kubernetes proxier_test 源码
kubernetes proxier_test 代码
文件路径：/pkg/proxy/iptables/proxier_test.go
/*
Copyright 2015 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package iptables
import (
"bytes"
"fmt"
"net"
"reflect"
"regexp"
stdruntime "runtime"
"sort"
"strconv"
"strings"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/lithammer/dedent"
"github.com/stretchr/testify/assert"
v1 "k8s.io/api/core/v1"
discovery "k8s.io/api/discovery/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/sets"
utilfeature "k8s.io/apiserver/pkg/util/feature"
featuregatetesting "k8s.io/component-base/featuregate/testing"
"k8s.io/component-base/metrics/testutil"
"k8s.io/klog/v2"
"k8s.io/kubernetes/pkg/features"
"k8s.io/kubernetes/pkg/proxy"
"k8s.io/kubernetes/pkg/proxy/metrics"
"k8s.io/kubernetes/pkg/proxy/healthcheck"
utilproxy "k8s.io/kubernetes/pkg/proxy/util"
proxyutiliptables "k8s.io/kubernetes/pkg/proxy/util/iptables"
utilproxytest "k8s.io/kubernetes/pkg/proxy/util/testing"
"k8s.io/kubernetes/pkg/util/async"
"k8s.io/kubernetes/pkg/util/conntrack"
utiliptables "k8s.io/kubernetes/pkg/util/iptables"
iptablestest "k8s.io/kubernetes/pkg/util/iptables/testing"
"k8s.io/utils/exec"
fakeexec "k8s.io/utils/exec/testing"
netutils "k8s.io/utils/net"
"k8s.io/utils/pointer"
)
func TestDeleteEndpointConnectionsIPv4(t *testing.T) {
const (
UDP = v1.ProtocolUDP
TCP = v1.ProtocolTCP
SCTP = v1.ProtocolSCTP
)
testCases := []struct {
description string
svcName string
svcIP string
svcPort int32
protocol v1.Protocol
endpoint string // IP:port endpoint
epSvcPair proxy.ServiceEndpoint // Will be generated by test
simulatedErr string
}{
{
description: "V4 UDP",
svcName: "v4-udp",
svcIP: "172.30.1.1",
svcPort: 80,
protocol: UDP,
endpoint: "10.240.0.3:80",
},
{
description: "V4 TCP",
svcName: "v4-tcp",
svcIP: "172.30.2.2",
svcPort: 80,
protocol: TCP,
endpoint: "10.240.0.4:80",
},
{
description: "V4 SCTP",
svcName: "v4-sctp",
svcIP: "172.30.3.3",
svcPort: 80,
protocol: SCTP,
endpoint: "10.240.0.5:80",
},
{
description: "V4 UDP, nothing to delete, benign error",
svcName: "v4-udp-nothing-to-delete",
svcIP: "172.30.1.1",
svcPort: 80,
protocol: UDP,
endpoint: "10.240.0.3:80",
simulatedErr: conntrack.NoConnectionToDelete,
},
{
description: "V4 UDP, unexpected error, should be glogged",
svcName: "v4-udp-simulated-error",
svcIP: "172.30.1.1",
svcPort: 80,
protocol: UDP,
endpoint: "10.240.0.3:80",
simulatedErr: "simulated error",
},
}
// Create a fake executor for the conntrack utility. This should only be
// invoked for UDP and SCTP connections, since no conntrack cleanup is needed for TCP
fcmd := fakeexec.FakeCmd{}
fexec := fakeexec.FakeExec{
LookPathFunc: func(cmd string) (string, error) { return cmd, nil },
}
execFunc := func(cmd string, args ...string) exec.Cmd {
return fakeexec.InitFakeCmd(&fcmd, cmd, args...)
}
for _, tc := range testCases {
if conntrack.IsClearConntrackNeeded(tc.protocol) {
var cmdOutput string
var simErr error
if tc.simulatedErr == "" {
cmdOutput = "1 flow entries have been deleted"
} else {
simErr = fmt.Errorf(tc.simulatedErr)
}
cmdFunc := func() ([]byte, []byte, error) { return []byte(cmdOutput), nil, simErr }
fcmd.CombinedOutputScript = append(fcmd.CombinedOutputScript, cmdFunc)
fexec.CommandScript = append(fexec.CommandScript, execFunc)
}
}
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.exec = &fexec
for _, tc := range testCases {
makeServiceMap(fp,
makeTestService("ns1", tc.svcName, func(svc *v1.Service) {
svc.Spec.ClusterIP = tc.svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: tc.svcPort,
Protocol: tc.protocol,
}}
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
}),
)
fp.serviceMap.Update(fp.serviceChanges)
}
// Run the test cases
for _, tc := range testCases {
priorExecs := fexec.CommandCalls
priorGlogErrs := klog.Stats.Error.Lines()
svc := proxy.ServicePortName{
NamespacedName: types.NamespacedName{Namespace: "ns1", Name: tc.svcName},
Port: "p80",
Protocol: tc.protocol,
}
input := []proxy.ServiceEndpoint{
{
Endpoint: tc.endpoint,
ServicePortName: svc,
},
}
fp.deleteEndpointConnections(input)
// For UDP and SCTP connections, check the executed conntrack command
var expExecs int
if conntrack.IsClearConntrackNeeded(tc.protocol) {
isIPv6 := func(ip string) bool {
netIP := netutils.ParseIPSloppy(ip)
return netIP.To4() == nil
}
endpointIP := utilproxy.IPPart(tc.endpoint)
expectCommand := fmt.Sprintf("conntrack -D --orig-dst %s --dst-nat %s -p %s", tc.svcIP, endpointIP, strings.ToLower(string((tc.protocol))))
if isIPv6(endpointIP) {
expectCommand += " -f ipv6"
}
actualCommand := strings.Join(fcmd.CombinedOutputLog[fexec.CommandCalls-1], " ")
if actualCommand != expectCommand {
t.Errorf("%s: Expected command: %s, but executed %s", tc.description, expectCommand, actualCommand)
}
expExecs = 1
}
// Check the number of times conntrack was executed
execs := fexec.CommandCalls - priorExecs
if execs != expExecs {
t.Errorf("%s: Expected conntrack to be executed %d times, but got %d", tc.description, expExecs, execs)
}
// Check the number of new glog errors
var expGlogErrs int64
if tc.simulatedErr != "" && tc.simulatedErr != conntrack.NoConnectionToDelete {
expGlogErrs = 1
}
glogErrs := klog.Stats.Error.Lines() - priorGlogErrs
if glogErrs != expGlogErrs {
t.Errorf("%s: Expected %d glogged errors, but got %d", tc.description, expGlogErrs, glogErrs)
}
}
}
func TestDeleteEndpointConnectionsIPv6(t *testing.T) {
const (
UDP = v1.ProtocolUDP
TCP = v1.ProtocolTCP
SCTP = v1.ProtocolSCTP
)
testCases := []struct {
description string
svcName string
svcIP string
svcPort int32
protocol v1.Protocol
endpoint string // IP:port endpoint
epSvcPair proxy.ServiceEndpoint // Will be generated by test
simulatedErr string
}{
{
description: "V6 UDP",
svcName: "v6-udp",
svcIP: "fd00:1234::20",
svcPort: 80,
protocol: UDP,
endpoint: "[2001:db8::2]:80",
},
{
description: "V6 TCP",
svcName: "v6-tcp",
svcIP: "fd00:1234::30",
svcPort: 80,
protocol: TCP,
endpoint: "[2001:db8::3]:80",
},
{
description: "V6 SCTP",
svcName: "v6-sctp",
svcIP: "fd00:1234::40",
svcPort: 80,
protocol: SCTP,
endpoint: "[2001:db8::4]:80",
},
}
// Create a fake executor for the conntrack utility. This should only be
// invoked for UDP and SCTP connections, since no conntrack cleanup is needed for TCP
fcmd := fakeexec.FakeCmd{}
fexec := fakeexec.FakeExec{
LookPathFunc: func(cmd string) (string, error) { return cmd, nil },
}
execFunc := func(cmd string, args ...string) exec.Cmd {
return fakeexec.InitFakeCmd(&fcmd, cmd, args...)
}
for _, tc := range testCases {
if conntrack.IsClearConntrackNeeded(tc.protocol) {
var cmdOutput string
var simErr error
if tc.simulatedErr == "" {
cmdOutput = "1 flow entries have been deleted"
} else {
simErr = fmt.Errorf(tc.simulatedErr)
}
cmdFunc := func() ([]byte, []byte, error) { return []byte(cmdOutput), nil, simErr }
fcmd.CombinedOutputScript = append(fcmd.CombinedOutputScript, cmdFunc)
fexec.CommandScript = append(fexec.CommandScript, execFunc)
}
}
ipt := iptablestest.NewIPv6Fake()
fp := NewFakeProxier(ipt)
fp.exec = &fexec
for _, tc := range testCases {
makeServiceMap(fp,
makeTestService("ns1", tc.svcName, func(svc *v1.Service) {
svc.Spec.ClusterIP = tc.svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: tc.svcPort,
Protocol: tc.protocol,
}}
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
}),
)
fp.serviceMap.Update(fp.serviceChanges)
}
// Run the test cases
for _, tc := range testCases {
priorExecs := fexec.CommandCalls
priorGlogErrs := klog.Stats.Error.Lines()
svc := proxy.ServicePortName{
NamespacedName: types.NamespacedName{Namespace: "ns1", Name: tc.svcName},
Port: "p80",
Protocol: tc.protocol,
}
input := []proxy.ServiceEndpoint{
{
Endpoint: tc.endpoint,
ServicePortName: svc,
},
}
fp.deleteEndpointConnections(input)
// For UDP and SCTP connections, check the executed conntrack command
var expExecs int
if conntrack.IsClearConntrackNeeded(tc.protocol) {
isIPv6 := func(ip string) bool {
netIP := netutils.ParseIPSloppy(ip)
return netIP.To4() == nil
}
endpointIP := utilproxy.IPPart(tc.endpoint)
expectCommand := fmt.Sprintf("conntrack -D --orig-dst %s --dst-nat %s -p %s", tc.svcIP, endpointIP, strings.ToLower(string((tc.protocol))))
if isIPv6(endpointIP) {
expectCommand += " -f ipv6"
}
actualCommand := strings.Join(fcmd.CombinedOutputLog[fexec.CommandCalls-1], " ")
if actualCommand != expectCommand {
t.Errorf("%s: Expected command: %s, but executed %s", tc.description, expectCommand, actualCommand)
}
expExecs = 1
}
// Check the number of times conntrack was executed
execs := fexec.CommandCalls - priorExecs
if execs != expExecs {
t.Errorf("%s: Expected conntrack to be executed %d times, but got %d", tc.description, expExecs, execs)
}
// Check the number of new glog errors
var expGlogErrs int64
if tc.simulatedErr != "" && tc.simulatedErr != conntrack.NoConnectionToDelete {
expGlogErrs = 1
}
glogErrs := klog.Stats.Error.Lines() - priorGlogErrs
if glogErrs != expGlogErrs {
t.Errorf("%s: Expected %d glogged errors, but got %d", tc.description, expGlogErrs, glogErrs)
}
}
}
// Conventions for tests using NewFakeProxier:
//
// Pod IPs: 10.0.0.0/8
// Service ClusterIPs: 172.30.0.0/16
// Node IPs: 192.168.0.0/24
// Local Node IP: 192.168.0.2
// Service ExternalIPs: 192.168.99.0/24
// LoadBalancer IPs: 1.2.3.4, 5.6.7.8, 9.10.11.12
// Non-cluster IPs: 203.0.113.0/24
// LB Source Range: 203.0.113.0/25
const testHostname = "test-hostname"
const testNodeIP = "192.168.0.2"
const testExternalClient = "203.0.113.2"
const testExternalClientBlocked = "203.0.113.130"
func NewFakeProxier(ipt utiliptables.Interface) *Proxier {
// TODO: Call NewProxier after refactoring out the goroutine
// invocation into a Run() method.
ipfamily := v1.IPv4Protocol
if ipt.IsIPv6() {
ipfamily = v1.IPv6Protocol
}
detectLocal, _ := proxyutiliptables.NewDetectLocalByCIDR("10.0.0.0/8", ipt)
networkInterfacer := utilproxytest.NewFakeNetwork()
itf := net.Interface{Index: 0, MTU: 0, Name: "lo", HardwareAddr: nil, Flags: 0}
addrs := []net.Addr{
&net.IPNet{IP: netutils.ParseIPSloppy("127.0.0.1"), Mask: net.CIDRMask(8, 32)},
&net.IPNet{IP: netutils.ParseIPSloppy("::1/128"), Mask: net.CIDRMask(128, 128)},
}
networkInterfacer.AddInterfaceAddr(&itf, addrs)
itf1 := net.Interface{Index: 1, MTU: 0, Name: "eth0", HardwareAddr: nil, Flags: 0}
addrs1 := []net.Addr{
&net.IPNet{IP: netutils.ParseIPSloppy(testNodeIP), Mask: net.CIDRMask(24, 32)},
}
networkInterfacer.AddInterfaceAddr(&itf1, addrs1)
p := &Proxier{
exec: &fakeexec.FakeExec{},
serviceMap: make(proxy.ServiceMap),
serviceChanges: proxy.NewServiceChangeTracker(newServiceInfo, ipfamily, nil, nil),
endpointsMap: make(proxy.EndpointsMap),
endpointsChanges: proxy.NewEndpointChangeTracker(testHostname, newEndpointInfo, ipfamily, nil, nil),
iptables: ipt,
masqueradeMark: "0x4000",
localDetector: detectLocal,
hostname: testHostname,
serviceHealthServer: healthcheck.NewFakeServiceHealthServer(),
precomputedProbabilities: make([]string, 0, 1001),
iptablesData: bytes.NewBuffer(nil),
existingFilterChainsData: bytes.NewBuffer(nil),
filterChains: utilproxy.LineBuffer{},
filterRules: utilproxy.LineBuffer{},
natChains: utilproxy.LineBuffer{},
natRules: utilproxy.LineBuffer{},
nodeIP: netutils.ParseIPSloppy(testNodeIP),
nodePortAddresses: make([]string, 0),
networkInterfacer: networkInterfacer,
}
p.setInitialized(true)
p.syncRunner = async.NewBoundedFrequencyRunner("test-sync-runner", p.syncProxyRules, 0, time.Minute, 1)
return p
}
// parseIPTablesData takes iptables-save output and returns a map of table name to array of lines.
func parseIPTablesData(ruleData string) (map[string][]string, error) {
// Split ruleData at the "COMMIT" lines; given valid input, this will result in
// one element for each table plus an extra empty element (since the ruleData
// should end with a "COMMIT" line).
rawTables := strings.Split(strings.TrimPrefix(ruleData, "\n"), "COMMIT\n")
nTables := len(rawTables) - 1
if nTables < 2 || rawTables[nTables] != "" {
return nil, fmt.Errorf("bad ruleData (%d tables)\n%s", nTables, ruleData)
}
tables := make(map[string][]string, nTables)
for i, table := range rawTables[:nTables] {
lines := strings.Split(strings.Trim(table, "\n"), "\n")
// The first line should be, eg, "*nat" or "*filter"
if lines[0][0] != '*' {
return nil, fmt.Errorf("bad ruleData (table %d starts with %q)", i+1, lines[0])
}
// add back the "COMMIT" line that got eaten by the strings.Split above
lines = append(lines, "COMMIT")
tables[lines[0][1:]] = lines
}
if tables["nat"] == nil {
return nil, fmt.Errorf("bad ruleData (no %q table)", "nat")
}
if tables["filter"] == nil {
return nil, fmt.Errorf("bad ruleData (no %q table)", "filter")
}
return tables, nil
}
func TestParseIPTablesData(t *testing.T) {
for _, tc := range []struct {
name string
input string
output map[string][]string
error string
}{
{
name: "basic test",
input: dedent.Dedent(`
*filter
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-NODEPORTS - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
COMMIT
`),
output: map[string][]string{
"filter": {
`*filter`,
`:KUBE-SERVICES - [0:0]`,
`:KUBE-EXTERNAL-SERVICES - [0:0]`,
`:KUBE-FORWARD - [0:0]`,
`:KUBE-NODEPORTS - [0:0]`,
`-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT`,
`-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP`,
`-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT`,
`-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT`,
`COMMIT`,
},
"nat": {
`*nat`,
`:KUBE-SERVICES - [0:0]`,
`:KUBE-NODEPORTS - [0:0]`,
`:KUBE-POSTROUTING - [0:0]`,
`:KUBE-MARK-MASQ - [0:0]`,
`:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]`,
`:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]`,
`-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN`,
`-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000`,
`-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE`,
`-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000`,
`-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O`,
`-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ`,
`-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -j KUBE-SEP-SXIVWICOYRO3J4NJ`,
`-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ`,
`-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80`,
`-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS`,
`COMMIT`,
},
},
},
{
name: "not enough tables",
input: dedent.Dedent(`
*filter
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
`),
error: "bad ruleData (1 tables)",
},
{
name: "trailing junk",
input: dedent.Dedent(`
*filter
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
junk
`),
error: "bad ruleData (2 tables)",
},
{
name: "bad start line",
input: dedent.Dedent(`
*filter
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
`),
error: `bad ruleData (table 2 starts with ":KUBE-SERVICES - [0:0]")`,
},
{
name: "no nat",
input: dedent.Dedent(`
*filter
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*mangle
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
`),
error: `bad ruleData (no "nat" table)`,
},
{
name: "no filter",
input: dedent.Dedent(`
*mangle
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
`),
error: `bad ruleData (no "filter" table)`,
},
} {
t.Run(tc.name, func(t *testing.T) {
out, err := parseIPTablesData(tc.input)
if err == nil {
if tc.error != "" {
t.Errorf("unexpectedly did not get error")
} else {
assert.Equal(t, tc.output, out)
}
} else {
if tc.error == "" {
t.Errorf("got unexpected error: %v", err)
} else if !strings.HasPrefix(err.Error(), tc.error) {
t.Errorf("got wrong error: %v (expected %q)", err, tc.error)
}
}
})
}
}
func countRules(tableName utiliptables.Table, ruleData string) int {
dump, err := iptablestest.ParseIPTablesDump(ruleData)
if err != nil {
klog.ErrorS(err, "error parsing iptables rules")
return -1
}
rules := 0
table, err := dump.GetTable(tableName)
if err != nil {
klog.ErrorS(err, "can't find table", "table", tableName)
return -1
}
for _, c := range table.Chains {
rules += len(c.Rules)
}
return rules
}
// findAllMatches takes an array of lines and a pattern with one parenthesized group, and
// returns a sorted array of all of the unique matches of the parenthesized group.
func findAllMatches(lines []string, pattern string) []string {
regex := regexp.MustCompile(pattern)
allMatches := sets.NewString()
for _, line := range lines {
match := regex.FindStringSubmatch(line)
if len(match) == 2 {
allMatches.Insert(match[1])
}
}
return allMatches.List()
}
// checkIPTablesRuleJumps checks that every `-j` in the given rules jumps to a chain
// that we created and added rules to
func checkIPTablesRuleJumps(ruleData string) error {
tables, err := parseIPTablesData(ruleData)
if err != nil {
return err
}
for tableName, lines := range tables {
// Find all of the lines like ":KUBE-SERVICES", indicating chains that
// iptables-restore would create when loading the data.
createdChains := sets.NewString(findAllMatches(lines, `^:([^ ]*)`)...)
// Find all of the lines like "-X KUBE-SERVICES ..." indicating chains
// that we are deleting because they are no longer used, and remove
// those chains from createdChains.
createdChains = createdChains.Delete(findAllMatches(lines, `-X ([^ ]*)`)...)
// Find all of the lines like "-A KUBE-SERVICES ..." indicating chains
// that we are adding at least one rule to.
filledChains := sets.NewString(findAllMatches(lines, `-A ([^ ]*)`)...)
// Find all of the chains that are jumped to by some rule so we can make
// sure we only jump to valid chains.
jumpedChains := sets.NewString(findAllMatches(lines, `-j ([^ ]*)`)...)
// Ignore jumps to chains that we expect to exist even if kube-proxy
// didn't create them itself.
jumpedChains.Delete("ACCEPT", "REJECT", "DROP", "MARK", "RETURN", "DNAT", "SNAT", "MASQUERADE")
// Find cases where we have "-A FOO ... -j BAR" but no ":BAR", meaning
// that we are jumping to a chain that was not created.
missingChains := jumpedChains.Difference(createdChains)
missingChains = missingChains.Union(filledChains.Difference(createdChains))
if len(missingChains) > 0 {
return fmt.Errorf("some chains in %s are used but were not created: %v", tableName, missingChains.List())
}
// Find cases where we have "-A FOO ... -j BAR", but no "-A BAR ...",
// meaning that we are jumping to a chain that we didn't write out any
// rules for, which is normally a bug. (Except that KUBE-SERVICES always
// jumps to KUBE-NODEPORTS, even when there are no NodePort rules.)
emptyChains := jumpedChains.Difference(filledChains)
emptyChains.Delete(string(kubeNodePortsChain))
if len(emptyChains) > 0 {
return fmt.Errorf("some chains in %s are jumped to but have no rules: %v", tableName, emptyChains.List())
}
// Find cases where we have ":BAR" but no "-A FOO ... -j BAR", meaning
// that we are creating an empty chain but not using it for anything.
extraChains := createdChains.Difference(jumpedChains)
extraChains.Delete(string(kubeServicesChain), string(kubeExternalServicesChain), string(kubeNodePortsChain), string(kubePostroutingChain), string(kubeForwardChain), string(kubeMarkMasqChain), string(kubeProxyFirewallChain))
if len(extraChains) > 0 {
return fmt.Errorf("some chains in %s are created but not used: %v", tableName, extraChains.List())
}
}
return nil
}
func TestCheckIPTablesRuleJumps(t *testing.T) {
for _, tc := range []struct {
name string
input string
error string
}{
{
name: "valid",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-MARK-MASQ - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 10.20.30.41 --dport 80 ! -s 10.0.0.0/24 -j KUBE-MARK-MASQ
COMMIT
`),
error: "",
},
{
name: "can't jump to chain that wasn't created",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
COMMIT
`),
error: "some chains in nat are used but were not created: [KUBE-SVC-XPGD46QRK7WJZT7O]",
},
{
name: "can't jump to chain that has no rules",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
COMMIT
`),
error: "some chains in nat are jumped to but have no rules: [KUBE-SVC-XPGD46QRK7WJZT7O]",
},
{
name: "can't add rules to a chain that wasn't created",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-MARK-MASQ - [0:0]
:KUBE-SERVICES - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" ...
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
COMMIT
`),
error: "some chains in nat are used but were not created: [KUBE-SVC-XPGD46QRK7WJZT7O]",
},
{
name: "can't jump to chain that wasn't created",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
COMMIT
`),
error: "some chains in nat are used but were not created: [KUBE-SVC-XPGD46QRK7WJZT7O]",
},
{
name: "can't jump to chain that has no rules",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
COMMIT
`),
error: "some chains in nat are jumped to but have no rules: [KUBE-SVC-XPGD46QRK7WJZT7O]",
},
{
name: "can't add rules to a chain that wasn't created",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-MARK-MASQ - [0:0]
:KUBE-SERVICES - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" ...
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
COMMIT
`),
error: "some chains in nat are used but were not created: [KUBE-SVC-XPGD46QRK7WJZT7O]",
},
{
name: "can't create chain and then not use it",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-MARK-MASQ - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" ...
COMMIT
`),
error: "some chains in nat are created but not used: [KUBE-SVC-XPGD46QRK7WJZT7O]",
},
} {
t.Run(tc.name, func(t *testing.T) {
err := checkIPTablesRuleJumps(tc.input)
if err == nil {
if tc.error != "" {
t.Errorf("unexpectedly did not get error")
}
} else {
if tc.error == "" {
t.Errorf("got unexpected error: %v", err)
} else if !strings.HasPrefix(err.Error(), tc.error) {
t.Errorf("got wrong error: %v (expected %q)", err, tc.error)
}
}
})
}
}
// orderByCommentServiceName is a helper function that orders two IPTables rules
// based on the service name in their comment. (If either rule has no comment then the
// return value is undefined.)
func orderByCommentServiceName(rule1, rule2 *iptablestest.Rule) bool {
if rule1.Comment == nil || rule2.Comment == nil {
return false
}
name1, name2 := rule1.Comment.Value, rule2.Comment.Value
// The service name is the comment up to the first space or colon
i := strings.IndexAny(name1, " :")
if i != -1 {
name1 = name1[:i]
}
i = strings.IndexAny(name2, " :")
if i != -1 {
name2 = name2[:i]
}
return name1 < name2
}
// sortIPTablesRules sorts `iptables-restore` output so as to not depend on the order that
// Services get processed in, while preserving the relative ordering of related rules.
func sortIPTablesRules(ruleData string) (string, error) {
dump, err := iptablestest.ParseIPTablesDump(ruleData)
if err != nil {
return "", err
}
// Sort tables
sort.Slice(dump.Tables, func(i, j int) bool {
return dump.Tables[i].Name < dump.Tables[j].Name
})
// Sort chains
for t := range dump.Tables {
table := &dump.Tables[t]
sort.Slice(table.Chains, func(i, j int) bool {
switch {
case table.Chains[i].Name == kubeNodePortsChain:
// KUBE-NODEPORTS comes before anything
return true
case table.Chains[j].Name == kubeNodePortsChain:
// anything goes after KUBE-NODEPORTS
return false
case table.Chains[i].Name == kubeServicesChain:
// KUBE-SERVICES comes before anything (except KUBE-NODEPORTS)
return true
case table.Chains[j].Name == kubeServicesChain:
// anything (except KUBE-NODEPORTS) goes after KUBE-SERVICES
return false
case strings.HasPrefix(string(table.Chains[i].Name), "KUBE-") && !strings.HasPrefix(string(table.Chains[j].Name), "KUBE-"):
// KUBE-* comes before non-KUBE-*
return true
case !strings.HasPrefix(string(table.Chains[i].Name), "KUBE-") && strings.HasPrefix(string(table.Chains[j].Name), "KUBE-"):
// non-KUBE-* goes after KUBE-*
return false
default:
// We have two KUBE-* chains or two non-KUBE-* chains; either
// way they sort alphabetically
return table.Chains[i].Name < table.Chains[j].Name
}
})
}
// Sort KUBE-NODEPORTS chains by service name
chain, _ := dump.GetChain(utiliptables.TableFilter, kubeNodePortsChain)
if chain != nil {
sort.SliceStable(chain.Rules, func(i, j int) bool {
return orderByCommentServiceName(chain.Rules[i], chain.Rules[j])
})
}
chain, _ = dump.GetChain(utiliptables.TableNAT, kubeNodePortsChain)
if chain != nil {
sort.SliceStable(chain.Rules, func(i, j int) bool {
return orderByCommentServiceName(chain.Rules[i], chain.Rules[j])
})
}
// Sort KUBE-SERVICES chains by service name (but keeping the "must be the last
// rule" rule in the "nat" table's KUBE-SERVICES chain last).
chain, _ = dump.GetChain(utiliptables.TableFilter, kubeServicesChain)
if chain != nil {
sort.SliceStable(chain.Rules, func(i, j int) bool {
return orderByCommentServiceName(chain.Rules[i], chain.Rules[j])
})
}
chain, _ = dump.GetChain(utiliptables.TableNAT, kubeServicesChain)
if chain != nil {
sort.SliceStable(chain.Rules, func(i, j int) bool {
if chain.Rules[i].Comment != nil && strings.Contains(chain.Rules[i].Comment.Value, "must be the last rule") {
return false
} else if chain.Rules[j].Comment != nil && strings.Contains(chain.Rules[j].Comment.Value, "must be the last rule") {
return true
}
return orderByCommentServiceName(chain.Rules[i], chain.Rules[j])
})
}
return dump.String(), nil
}
func TestSortIPTablesRules(t *testing.T) {
for _, tc := range []struct {
name string
input string
output string
error string
}{
{
name: "basic test using each match type",
input: dedent.Dedent(`
*filter
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m addrtype --dst-type LOCAL -m tcp -p tcp --dport 3001 -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A KUBE-PROXY-FIREWALL -m comment --comment "ns5/svc5:p80 traffic not accepted by KUBE-FW-NUKIZ6OKUXPJNT4C" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j DROP
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-NODEPORTS - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SVC-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-EXT-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-SVL-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-FW-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-SEP-RS4RBKLTHTF2IUXJ - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SEP-OYPFS5VJICHGATKP - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SEP-UKSFD7AGPMPPLUHC - [0:0]
:KUBE-SEP-C6EBXVWJJZMIWKLZ - [0:0]
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 external IP" -m tcp -p tcp -d 192.168.99.11 --dport 80 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-FW-GNZBNJ2PO5MGZ6GT
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment ns2/svc2:p80 -j KUBE-SEP-RS4RBKLTHTF2IUXJ
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -s 10.180.0.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
-A KUBE-FW-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 loadbalancer IP" -s 203.0.113.0/25 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-NODEPORTS -m comment --comment ns2/svc2:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "Redirect pods trying to reach external loadbalancer VIP to clusterIP" -s 10.0.0.0/8 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "masquerade LOCAL traffic for ns2/svc2:p80 LB IP" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "route LOCAL traffic for ns2/svc2:p80 LB IP to service chain" -m addrtype --src-type LOCAL -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -j KUBE-SVL-GNZBNJ2PO5MGZ6GT
-A KUBE-SVL-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 has no local endpoints" -j KUBE-MARK-DROP
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-NODEPORTS -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3002 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3002 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -j KUBE-SEP-OYPFS5VJICHGATKP
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -s 10.180.0.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 192.168.99.22 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-UKSFD7AGPMPPLUHC
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -j KUBE-SEP-C6EBXVWJJZMIWKLZ
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -s 10.180.0.4 -j KUBE-MARK-MASQ
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.4:80
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -s 10.180.0.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.5:80
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
COMMIT
`),
output: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m addrtype --dst-type LOCAL -m tcp -p tcp --dport 3001 -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A KUBE-PROXY-FIREWALL -m comment --comment "ns5/svc5:p80 traffic not accepted by KUBE-FW-NUKIZ6OKUXPJNT4C" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j DROP
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-FW-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-C6EBXVWJJZMIWKLZ - [0:0]
:KUBE-SEP-OYPFS5VJICHGATKP - [0:0]
:KUBE-SEP-RS4RBKLTHTF2IUXJ - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-UKSFD7AGPMPPLUHC - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SVC-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
:KUBE-SVL-GNZBNJ2PO5MGZ6GT - [0:0]
-A KUBE-NODEPORTS -m comment --comment ns2/svc2:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-NODEPORTS -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3002 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 external IP" -m tcp -p tcp -d 192.168.99.11 --dport 80 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-FW-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "Redirect pods trying to reach external loadbalancer VIP to clusterIP" -s 10.0.0.0/8 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "masquerade LOCAL traffic for ns2/svc2:p80 LB IP" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "route LOCAL traffic for ns2/svc2:p80 LB IP to service chain" -m addrtype --src-type LOCAL -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -j KUBE-SVL-GNZBNJ2PO5MGZ6GT
-A KUBE-FW-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 loadbalancer IP" -s 203.0.113.0/25 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -s 10.180.0.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.5:80
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -s 10.180.0.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -s 10.180.0.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -s 10.180.0.4 -j KUBE-MARK-MASQ
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.4:80
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 192.168.99.22 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-UKSFD7AGPMPPLUHC
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment ns4/svc4:p80 -j KUBE-SEP-C6EBXVWJJZMIWKLZ
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment ns2/svc2:p80 -j KUBE-SEP-RS4RBKLTHTF2IUXJ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3002 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment ns3/svc3:p80 -j KUBE-SEP-OYPFS5VJICHGATKP
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment ns1/svc1:p80 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SVL-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 has no local endpoints" -j KUBE-MARK-DROP
COMMIT
`),
},
{
name: "extra tables",
input: dedent.Dedent(`
*filter
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*mangle
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
`),
output: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*mangle
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
`),
},
{
name: "correctly match same service name in different styles of comments",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" svc2 line 1
-A KUBE-SERVICES -m comment --comment ns2/svc2 svc2 line 2
-A KUBE-SERVICES -m comment --comment "ns2/svc2 blah" svc2 line 3
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" svc1 line 1
-A KUBE-SERVICES -m comment --comment ns1/svc1 svc1 line 2
-A KUBE-SERVICES -m comment --comment "ns1/svc1 blah" svc1 line 3
-A KUBE-SERVICES -m comment --comment ns4/svc4 svc4 line 1
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" svc4 line 2
-A KUBE-SERVICES -m comment --comment "ns4/svc4 blah" svc4 line 3
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" svc3 line 1
-A KUBE-SERVICES -m comment --comment "ns3/svc3 blah" svc3 line 2
-A KUBE-SERVICES -m comment --comment ns3/svc3 svc3 line 3
COMMIT
`),
output: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" svc1 line 1
-A KUBE-SERVICES -m comment --comment ns1/svc1 svc1 line 2
-A KUBE-SERVICES -m comment --comment "ns1/svc1 blah" svc1 line 3
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" svc2 line 1
-A KUBE-SERVICES -m comment --comment ns2/svc2 svc2 line 2
-A KUBE-SERVICES -m comment --comment "ns2/svc2 blah" svc2 line 3
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" svc3 line 1
-A KUBE-SERVICES -m comment --comment "ns3/svc3 blah" svc3 line 2
-A KUBE-SERVICES -m comment --comment ns3/svc3 svc3 line 3
-A KUBE-SERVICES -m comment --comment ns4/svc4 svc4 line 1
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" svc4 line 2
-A KUBE-SERVICES -m comment --comment "ns4/svc4 blah" svc4 line 3
COMMIT
`),
},
{
name: "unexpected junk lines are preserved",
input: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-SEP-RS4RBKLTHTF2IUXJ - [0:0]
:KUBE-AAAAA - [0:0]
:KUBE-ZZZZZ - [0:0]
:WHY-IS-THIS-CHAIN-HERE - [0:0]
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" svc2 line 1
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
-A KUBE-ZZZZZ -m comment --comment "mystery chain number 1"
-A KUBE-SERVICES -m comment --comment ns2/svc2 svc2 line 2
-A WHY-IS-THIS-CHAIN-HERE -j ACCEPT
-A KUBE-SERVICES -m comment --comment "ns2/svc2 blah" svc2 line 3
-A KUBE-AAAAA -m comment --comment "mystery chain number 2"
COMMIT
`),
output: dedent.Dedent(`
*filter
COMMIT
*nat
:KUBE-SERVICES - [0:0]
:KUBE-AAAAA - [0:0]
:KUBE-SEP-RS4RBKLTHTF2IUXJ - [0:0]
:KUBE-ZZZZZ - [0:0]
:WHY-IS-THIS-CHAIN-HERE - [0:0]
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" svc2 line 1
-A KUBE-SERVICES -m comment --comment ns2/svc2 svc2 line 2
-A KUBE-SERVICES -m comment --comment "ns2/svc2 blah" svc2 line 3
-A KUBE-AAAAA -m comment --comment "mystery chain number 2"
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
-A KUBE-ZZZZZ -m comment --comment "mystery chain number 1"
-A WHY-IS-THIS-CHAIN-HERE -j ACCEPT
COMMIT
`),
},
} {
t.Run(tc.name, func(t *testing.T) {
out, err := sortIPTablesRules(tc.input)
if err == nil {
if tc.error != "" {
t.Errorf("unexpectedly did not get error")
} else {
assert.Equal(t, strings.TrimPrefix(tc.output, "\n"), out)
}
} else {
if tc.error == "" {
t.Errorf("got unexpected error: %v", err)
} else if !strings.HasPrefix(err.Error(), tc.error) {
t.Errorf("got wrong error: %v (expected %q)", err, tc.error)
}
}
})
}
}
// getLine returns the line number of the caller, if possible. This is useful in
// tests with a large number of cases - when something goes wrong you can find
// which case more easily.
func getLine() int {
_, _, line, ok := stdruntime.Caller(1)
if ok {
return line
}
return 0
}
// assertIPTablesRulesEqual asserts that the generated rules in result match the rules in
// expected, ignoring irrelevant ordering differences.
func assertIPTablesRulesEqual(t *testing.T, line int, expected, result string) {
expected = strings.TrimLeft(expected, " \t\n")
result, err := sortIPTablesRules(strings.TrimLeft(result, " \t\n"))
if err != nil {
t.Fatalf("%s", err)
}
lineStr := ""
if line != 0 {
lineStr = fmt.Sprintf(" (from line %d)", line)
}
if diff := cmp.Diff(expected, result); diff != "" {
t.Errorf("rules do not match%s:\ndiff:\n%s\nfull result:\n```\n%s```", lineStr, diff, result)
}
err = checkIPTablesRuleJumps(expected)
if err != nil {
t.Fatalf("%s", err)
}
}
// assertIPTablesRulesNotEqual asserts that the generated rules in result DON'T match the
// rules in expected, ignoring irrelevant ordering differences.
func assertIPTablesRulesNotEqual(t *testing.T, line int, expected, result string) {
expected = strings.TrimLeft(expected, " \t\n")
result, err := sortIPTablesRules(strings.TrimLeft(result, " \t\n"))
if err != nil {
t.Fatalf("%s", err)
}
lineStr := ""
if line != 0 {
lineStr = fmt.Sprintf(" (from line %d)", line)
}
if cmp.Equal(expected, result) {
t.Errorf("rules do not differ%s:\nfull result:\n```\n%s```", lineStr, result)
}
err = checkIPTablesRuleJumps(expected)
if err != nil {
t.Fatalf("%s", err)
}
err = checkIPTablesRuleJumps(result)
if err != nil {
t.Fatalf("%s", err)
}
}
// addressMatches helps test whether an iptables rule such as "! -s 192.168.0.0/16" matches
// ipStr. address.Value is either an IP address ("1.2.3.4") or a CIDR string
// ("1.2.3.0/24").
func addressMatches(t *testing.T, address *iptablestest.IPTablesValue, ipStr string) bool {
ip := netutils.ParseIPSloppy(ipStr)
if ip == nil {
t.Fatalf("Bad IP in test case: %s", ipStr)
}
var matches bool
if strings.Contains(address.Value, "/") {
_, cidr, err := netutils.ParseCIDRSloppy(address.Value)
if err != nil {
t.Errorf("Bad CIDR in kube-proxy output: %v", err)
}
matches = cidr.Contains(ip)
} else {
ip2 := netutils.ParseIPSloppy(address.Value)
if ip2 == nil {
t.Errorf("Bad IP/CIDR in kube-proxy output: %s", address.Value)
}
matches = ip.Equal(ip2)
}
return (!address.Negated && matches) || (address.Negated && !matches)
}
// iptablesTracer holds data used while virtually tracing a packet through a set of
// iptables rules
type iptablesTracer struct {
ipt *iptablestest.FakeIPTables
nodeIP string
t *testing.T
// matches accumulates the list of rules that were matched, for debugging purposes.
matches []string
// outputs accumulates the list of matched terminal rule targets (endpoint
// IP:ports, or a special target like "REJECT") and is eventually used to generate
// the return value of tracePacket.
outputs []string
// markMasq tracks whether the packet has been marked for masquerading
markMasq bool
}
// newIPTablesTracer creates an iptablesTracer. nodeIP is the IP to treat as the local
// node IP (for determining whether rules with "--src-type LOCAL" or "--dst-type LOCAL"
// match).
func newIPTablesTracer(t *testing.T, ipt *iptablestest.FakeIPTables, nodeIP string) *iptablesTracer {
return &iptablesTracer{
ipt: ipt,
nodeIP: nodeIP,
t: t,
}
}
// ruleMatches checks if the given iptables rule matches (at least probabilistically) a
// packet with the given sourceIP, destIP, and destPort. (Note that protocol is currently
// ignored.)
func (tracer *iptablesTracer) ruleMatches(rule *iptablestest.Rule, sourceIP, destIP, destPort string) bool {
// The sub-rules within an iptables rule are ANDed together, so the rule only
// matches if all of them match. So go through the subrules, and if any of them
// DON'T match, then fail.
if rule.SourceAddress != nil && !addressMatches(tracer.t, rule.SourceAddress, sourceIP) {
return false
}
if rule.SourceType != nil {
addrtype := "not-matched"
if sourceIP == tracer.nodeIP || sourceIP == "127.0.0.1" {
addrtype = "LOCAL"
}
if !rule.SourceType.Matches(addrtype) {
return false
}
}
if rule.DestinationAddress != nil && !addressMatches(tracer.t, rule.DestinationAddress, destIP) {
return false
}
if rule.DestinationType != nil {
addrtype := "not-matched"
if destIP == tracer.nodeIP || destIP == "127.0.0.1" {
addrtype = "LOCAL"
}
if !rule.DestinationType.Matches(addrtype) {
return false
}
}
if rule.DestinationPort != nil && !rule.DestinationPort.Matches(destPort) {
return false
}
// Any rule that checks for past state/history does not match
if rule.AffinityCheck != nil || rule.MarkCheck != nil || rule.CTStateCheck != nil {
return false
}
// Anything else is assumed to match
return true
}
// runChain runs the given packet through the rules in the given table and chain, updating
// tracer's internal state accordingly. It returns true if it hits a terminal action.
func (tracer *iptablesTracer) runChain(table utiliptables.Table, chain utiliptables.Chain, sourceIP, destIP, destPort string) bool {
c, _ := tracer.ipt.Dump.GetChain(table, chain)
if c == nil {
return false
}
for _, rule := range c.Rules {
if rule.Jump == nil {
// You _can_ have rules that don't end in `-j`, but we don't currently
// do that.
tracer.t.Errorf("Could not find jump target in rule %q", rule.Raw)
}
if !tracer.ruleMatches(rule, sourceIP, destIP, destPort) {
continue
}
// record the matched rule for debugging purposes
tracer.matches = append(tracer.matches, rule.Raw)
switch rule.Jump.Value {
case "KUBE-MARK-MASQ":
tracer.markMasq = true
continue
case "ACCEPT", "REJECT", "DROP":
// (only valid in filter)
tracer.outputs = append(tracer.outputs, rule.Jump.Value)
return true
case "DNAT":
// (only valid in nat)
tracer.outputs = append(tracer.outputs, rule.DNATDestination.Value)
return true
default:
// We got a "-j KUBE-SOMETHING", so process that chain
terminated := tracer.runChain(table, utiliptables.Chain(rule.Jump.Value), sourceIP, destIP, destPort)
// If the subchain hit a terminal rule AND the rule that sent us
// to that chain was non-probabilistic, then this chain terminates
// as well. But if we went there because of a --probability rule,
// then we want to keep accumulating further matches against this
// chain.
if terminated && rule.Probability == nil {
return true
}
}
}
return false
}
// tracePacket determines what would happen to a packet with the given sourceIP, destIP,
// and destPort, given the indicated iptables ruleData. nodeIP is the local node IP (for
// rules matching "LOCAL").
//
// The return values are: an array of matched rules (for debugging), the final packet
// destinations (a comma-separated list of IPs, or one of the special targets "ACCEPT",
// "DROP", or "REJECT"), and whether the packet would be masqueraded.
func tracePacket(t *testing.T, ipt *iptablestest.FakeIPTables, sourceIP, destIP, destPort, nodeIP string) ([]string, string, bool) {
tracer := newIPTablesTracer(t, ipt, nodeIP)
// nat:PREROUTING goes first
tracer.runChain(utiliptables.TableNAT, utiliptables.ChainPrerouting, sourceIP, destIP, destPort)
// After the PREROUTING rules run, pending DNATs are processed (which would affect
// the destination IP that later rules match against).
if len(tracer.outputs) != 0 {
destIP = strings.Split(tracer.outputs[0], ":")[0]
}
// Now the filter rules get run; exactly which ones depend on whether this is an
// inbound, outbound, or intra-host packet, which we don't know. So we just run
// the interesting tables manually. (Theoretically this could cause conflicts in
// the future in which case we'd have to do something more complicated.)
tracer.runChain(utiliptables.TableFilter, kubeServicesChain, sourceIP, destIP, destPort)
tracer.runChain(utiliptables.TableFilter, kubeExternalServicesChain, sourceIP, destIP, destPort)
tracer.runChain(utiliptables.TableFilter, kubeNodePortsChain, sourceIP, destIP, destPort)
tracer.runChain(utiliptables.TableFilter, kubeProxyFirewallChain, sourceIP, destIP, destPort)
// Finally, the nat:POSTROUTING rules run, but the only interesting thing that
// happens there is that the masquerade mark gets turned into actual masquerading.
return tracer.matches, strings.Join(tracer.outputs, ", "), tracer.markMasq
}
type packetFlowTest struct {
name string
sourceIP string
destIP string
destPort int
output string
masq bool
}
func runPacketFlowTests(t *testing.T, line int, ipt *iptablestest.FakeIPTables, nodeIP string, testCases []packetFlowTest) {
lineStr := ""
if line != 0 {
lineStr = fmt.Sprintf(" (from line %d)", line)
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
matches, output, masq := tracePacket(t, ipt, tc.sourceIP, tc.destIP, fmt.Sprintf("%d", tc.destPort), nodeIP)
var errors []string
if output != tc.output {
errors = append(errors, fmt.Sprintf("wrong output: expected %q got %q", tc.output, output))
}
if masq != tc.masq {
errors = append(errors, fmt.Sprintf("wrong masq: expected %v got %v", tc.masq, masq))
}
if errors != nil {
t.Errorf("Test %q of a packet from %s to %s:%d%s got result:\n%s\n\nBy matching:\n%s\n\n",
tc.name, tc.sourceIP, tc.destIP, tc.destPort, lineStr, strings.Join(errors, "\n"), strings.Join(matches, "\n"))
}
})
}
}
// This tests tracePackets against static data, just to make sure we match things in the
// way we expect to.
func TestTracePackets(t *testing.T) {
rules := dedent.Dedent(`
*filter
:INPUT - [0:0]
:FORWARD - [0:0]
:OUTPUT - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A INPUT -m comment --comment kubernetes health check service ports -j KUBE-NODEPORTS
-A INPUT -m conntrack --ctstate NEW -m comment --comment kubernetes externally-visible service portals -j KUBE-EXTERNAL-SERVICES
-A FORWARD -m comment --comment kubernetes forwarding rules -j KUBE-FORWARD
-A FORWARD -m conntrack --ctstate NEW -m comment --comment kubernetes service portals -j KUBE-SERVICES
-A FORWARD -m conntrack --ctstate NEW -m comment --comment kubernetes externally-visible service portals -j KUBE-EXTERNAL-SERVICES
-A OUTPUT -m conntrack --ctstate NEW -m comment --comment kubernetes service portals -j KUBE-SERVICES
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-SERVICES -m comment --comment "ns6/svc6:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.46 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m addrtype --dst-type LOCAL -m tcp -p tcp --dport 3001 -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A KUBE-PROXY-FIREWALL -m comment --comment "ns5/svc5:p80 traffic not accepted by KUBE-FW-NUKIZ6OKUXPJNT4C" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j DROP
COMMIT
*nat
:PREROUTING - [0:0]
:INPUT - [0:0]
:OUTPUT - [0:0]
:POSTROUTING - [0:0]
:KUBE-EXT-4SW47YFZTEDKD3PK - [0:0]
:KUBE-EXT-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-EXT-NUKIZ6OKUXPJNT4C - [0:0]
:KUBE-EXT-X27LE4BHSL4DOUIK - [0:0]
:KUBE-FW-NUKIZ6OKUXPJNT4C - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-NODEPORTS - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-C6EBXVWJJZMIWKLZ - [0:0]
:KUBE-SEP-I77PXRDZVX7PMWMN - [0:0]
:KUBE-SEP-OYPFS5VJICHGATKP - [0:0]
:KUBE-SEP-RS4RBKLTHTF2IUXJ - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-UKSFD7AGPMPPLUHC - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SVC-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-SVC-NUKIZ6OKUXPJNT4C - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A PREROUTING -m comment --comment kubernetes service portals -j KUBE-SERVICES
-A OUTPUT -m comment --comment kubernetes service portals -j KUBE-SERVICES
-A POSTROUTING -m comment --comment kubernetes postrouting rules -j KUBE-POSTROUTING
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-NODEPORTS -m comment --comment ns2/svc2:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-NODEPORTS -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3003 -j KUBE-EXT-X27LE4BHSL4DOUIK
-A KUBE-NODEPORTS -m comment --comment ns5/svc5:p80 -m tcp -p tcp --dport 3002 -j KUBE-EXT-NUKIZ6OKUXPJNT4C
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 external IP" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 192.168.99.33 --dport 80 -j KUBE-EXT-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "ns5/svc5:p80 cluster IP" -m tcp -p tcp -d 172.30.0.45 --dport 80 -j KUBE-SVC-NUKIZ6OKUXPJNT4C
-A KUBE-SERVICES -m comment --comment "ns5/svc5:p80 loadbalancer IP" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j KUBE-FW-NUKIZ6OKUXPJNT4C
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-4SW47YFZTEDKD3PK -m comment --comment "masquerade traffic for ns4/svc4:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-4SW47YFZTEDKD3PK -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "pod traffic for ns2/svc2:p80 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "masquerade LOCAL traffic for ns2/svc2:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "route LOCAL traffic for ns2/svc2:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-NUKIZ6OKUXPJNT4C -m comment --comment "masquerade traffic for ns5/svc5:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-NUKIZ6OKUXPJNT4C -j KUBE-SVC-NUKIZ6OKUXPJNT4C
-A KUBE-EXT-X27LE4BHSL4DOUIK -m comment --comment "masquerade traffic for ns3/svc3:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-X27LE4BHSL4DOUIK -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-FW-NUKIZ6OKUXPJNT4C -m comment --comment "ns5/svc5:p80 loadbalancer IP" -s 203.0.113.0/25 -j KUBE-EXT-NUKIZ6OKUXPJNT4C
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -s 10.180.0.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.5:80
-A KUBE-SEP-I77PXRDZVX7PMWMN -m comment --comment ns5/svc5:p80 -s 10.180.0.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-I77PXRDZVX7PMWMN -m comment --comment ns5/svc5:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -s 10.180.0.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -s 10.180.0.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -s 10.180.0.4 -j KUBE-MARK-MASQ
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.4:80
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.180.0.4:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-UKSFD7AGPMPPLUHC
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.180.0.5:80" -j KUBE-SEP-C6EBXVWJJZMIWKLZ
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 -> 10.180.0.2:80" -j KUBE-SEP-RS4RBKLTHTF2IUXJ
-A KUBE-SVC-NUKIZ6OKUXPJNT4C -m comment --comment "ns5/svc5:p80 cluster IP" -m tcp -p tcp -d 172.30.0.45 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-NUKIZ6OKUXPJNT4C -m comment --comment "ns5/svc5:p80 -> 10.180.0.3:80" -j KUBE-SEP-I77PXRDZVX7PMWMN
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.180.0.3:80" -j KUBE-SEP-OYPFS5VJICHGATKP
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -j KUBE-SEP-SXIVWICOYRO3J4NJ
COMMIT
`)
ipt := iptablestest.NewFake()
err := ipt.RestoreAll([]byte(rules), utiliptables.NoFlushTables, utiliptables.RestoreCounters)
if err != nil {
t.Fatalf("Restore of test data failed: %v", err)
}
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "no match",
sourceIP: "10.0.0.2",
destIP: "10.0.0.3",
destPort: 80,
output: "",
},
{
name: "single endpoint",
sourceIP: "10.0.0.2",
destIP: "172.30.0.41",
destPort: 80,
output: "10.180.0.1:80",
},
{
name: "multiple endpoints",
sourceIP: "10.0.0.2",
destIP: "172.30.0.44",
destPort: 80,
output: "10.180.0.4:80, 10.180.0.5:80",
},
{
name: "LOCAL, KUBE-MARK-MASQ",
sourceIP: testNodeIP,
destIP: "192.168.99.22",
destPort: 80,
output: "10.180.0.2:80",
masq: true,
},
{
name: "DROP",
sourceIP: testExternalClient,
destIP: "192.168.99.22",
destPort: 80,
output: "DROP",
},
{
name: "ACCEPT (NodePortHealthCheck)",
sourceIP: testNodeIP,
destIP: testNodeIP,
destPort: 30000,
output: "ACCEPT",
},
{
name: "REJECT",
sourceIP: "10.0.0.2",
destIP: "172.30.0.46",
destPort: 80,
output: "REJECT",
},
})
}
// TestOverallIPTablesRulesWithMultipleServices creates 4 types of services: ClusterIP,
// LoadBalancer, ExternalIP and NodePort and verifies if the NAT table rules created
// are exactly the same as what is expected. This test provides an overall view of how
// the NAT table rules look like with the different jumps.
func TestOverallIPTablesRulesWithMultipleServices(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
metrics.RegisterMetrics()
tcpProtocol := v1.ProtocolTCP
makeServiceMap(fp,
// create ClusterIP service
makeTestService("ns1", "svc1", func(svc *v1.Service) {
svc.Spec.ClusterIP = "172.30.0.41"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
}}
}),
// create LoadBalancer service with Local traffic policy
makeTestService("ns2", "svc2", func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Spec.ClusterIP = "172.30.0.42"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
NodePort: 3001,
}}
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: "1.2.3.4",
}}
svc.Spec.ExternalIPs = []string{"192.168.99.22"}
svc.Spec.HealthCheckNodePort = 30000
}),
// create NodePort service
makeTestService("ns3", "svc3", func(svc *v1.Service) {
svc.Spec.Type = "NodePort"
svc.Spec.ClusterIP = "172.30.0.43"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
NodePort: 3003,
}}
}),
// create ExternalIP service
makeTestService("ns4", "svc4", func(svc *v1.Service) {
svc.Spec.Type = "NodePort"
svc.Spec.ClusterIP = "172.30.0.44"
svc.Spec.ExternalIPs = []string{"192.168.99.33"}
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
TargetPort: intstr.FromInt(80),
}}
}),
// create LoadBalancer service with Cluster traffic policy and source ranges
makeTestService("ns5", "svc5", func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeCluster
svc.Spec.ClusterIP = "172.30.0.45"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
NodePort: 3002,
}}
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: "5.6.7.8",
}}
svc.Spec.HealthCheckNodePort = 30000
// Extra whitespace to ensure that invalid value will not result
// in a crash, for backward compatibility.
svc.Spec.LoadBalancerSourceRanges = []string{" 203.0.113.0/25"}
}),
// create ClusterIP service with no endpoints
makeTestService("ns6", "svc6", func(svc *v1.Service) {
svc.Spec.Type = "ClusterIP"
svc.Spec.ClusterIP = "172.30.0.46"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
TargetPort: intstr.FromInt(80),
}}
}),
)
populateEndpointSlices(fp,
// create ClusterIP service endpoints
makeTestEndpointSlice("ns1", "svc1", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.180.0.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
// create Local LoadBalancer endpoints. Note that since we aren't setting
// its NodeName, this endpoint will be considered non-local and ignored.
makeTestEndpointSlice("ns2", "svc2", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.180.0.2"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
// create NodePort service endpoints
makeTestEndpointSlice("ns3", "svc3", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.180.0.3"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
// create ExternalIP service endpoints
makeTestEndpointSlice("ns4", "svc4", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.180.0.4"},
}, {
Addresses: []string{"10.180.0.5"},
NodeName: pointer.String(testHostname),
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
// create Cluster LoadBalancer endpoints
makeTestEndpointSlice("ns5", "svc5", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.180.0.3"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns2/svc2:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-SERVICES -m comment --comment "ns6/svc6:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.46 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j DROP
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns2/svc2:p80 has no local endpoints" -m addrtype --dst-type LOCAL -m tcp -p tcp --dport 3001 -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A KUBE-PROXY-FIREWALL -m comment --comment "ns5/svc5:p80 traffic not accepted by KUBE-FW-NUKIZ6OKUXPJNT4C" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j DROP
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-4SW47YFZTEDKD3PK - [0:0]
:KUBE-EXT-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-EXT-NUKIZ6OKUXPJNT4C - [0:0]
:KUBE-EXT-X27LE4BHSL4DOUIK - [0:0]
:KUBE-FW-NUKIZ6OKUXPJNT4C - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-C6EBXVWJJZMIWKLZ - [0:0]
:KUBE-SEP-I77PXRDZVX7PMWMN - [0:0]
:KUBE-SEP-OYPFS5VJICHGATKP - [0:0]
:KUBE-SEP-RS4RBKLTHTF2IUXJ - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-UKSFD7AGPMPPLUHC - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SVC-GNZBNJ2PO5MGZ6GT - [0:0]
:KUBE-SVC-NUKIZ6OKUXPJNT4C - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-NODEPORTS -m comment --comment ns2/svc2:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-NODEPORTS -m comment --comment ns3/svc3:p80 -m tcp -p tcp --dport 3003 -j KUBE-EXT-X27LE4BHSL4DOUIK
-A KUBE-NODEPORTS -m comment --comment ns5/svc5:p80 -m tcp -p tcp --dport 3002 -j KUBE-EXT-NUKIZ6OKUXPJNT4C
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 external IP" -m tcp -p tcp -d 192.168.99.22 --dport 80 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p80 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-GNZBNJ2PO5MGZ6GT
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 external IP" -m tcp -p tcp -d 192.168.99.33 --dport 80 -j KUBE-EXT-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "ns5/svc5:p80 cluster IP" -m tcp -p tcp -d 172.30.0.45 --dport 80 -j KUBE-SVC-NUKIZ6OKUXPJNT4C
-A KUBE-SERVICES -m comment --comment "ns5/svc5:p80 loadbalancer IP" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j KUBE-FW-NUKIZ6OKUXPJNT4C
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-4SW47YFZTEDKD3PK -m comment --comment "masquerade traffic for ns4/svc4:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-4SW47YFZTEDKD3PK -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "pod traffic for ns2/svc2:p80 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "masquerade LOCAL traffic for ns2/svc2:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-GNZBNJ2PO5MGZ6GT -m comment --comment "route LOCAL traffic for ns2/svc2:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-GNZBNJ2PO5MGZ6GT
-A KUBE-EXT-NUKIZ6OKUXPJNT4C -m comment --comment "masquerade traffic for ns5/svc5:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-NUKIZ6OKUXPJNT4C -j KUBE-SVC-NUKIZ6OKUXPJNT4C
-A KUBE-EXT-X27LE4BHSL4DOUIK -m comment --comment "masquerade traffic for ns3/svc3:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-X27LE4BHSL4DOUIK -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-FW-NUKIZ6OKUXPJNT4C -m comment --comment "ns5/svc5:p80 loadbalancer IP" -s 203.0.113.0/25 -j KUBE-EXT-NUKIZ6OKUXPJNT4C
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -s 10.180.0.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-C6EBXVWJJZMIWKLZ -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.5:80
-A KUBE-SEP-I77PXRDZVX7PMWMN -m comment --comment ns5/svc5:p80 -s 10.180.0.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-I77PXRDZVX7PMWMN -m comment --comment ns5/svc5:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -s 10.180.0.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-OYPFS5VJICHGATKP -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.3:80
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -s 10.180.0.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-RS4RBKLTHTF2IUXJ -m comment --comment ns2/svc2:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.2:80
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -s 10.180.0.4 -j KUBE-MARK-MASQ
-A KUBE-SEP-UKSFD7AGPMPPLUHC -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.4:80
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.180.0.4:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-UKSFD7AGPMPPLUHC
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.180.0.5:80" -j KUBE-SEP-C6EBXVWJJZMIWKLZ
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-GNZBNJ2PO5MGZ6GT -m comment --comment "ns2/svc2:p80 -> 10.180.0.2:80" -j KUBE-SEP-RS4RBKLTHTF2IUXJ
-A KUBE-SVC-NUKIZ6OKUXPJNT4C -m comment --comment "ns5/svc5:p80 cluster IP" -m tcp -p tcp -d 172.30.0.45 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-NUKIZ6OKUXPJNT4C -m comment --comment "ns5/svc5:p80 -> 10.180.0.3:80" -j KUBE-SEP-I77PXRDZVX7PMWMN
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.180.0.3:80" -j KUBE-SEP-OYPFS5VJICHGATKP
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -j KUBE-SEP-SXIVWICOYRO3J4NJ
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
natRulesMetric, err := testutil.GetGaugeMetricValue(metrics.IptablesRulesTotal.WithLabelValues(string(utiliptables.TableNAT)))
if err != nil {
t.Errorf("failed to get %s value, err: %v", metrics.IptablesRulesTotal.Name, err)
}
nNatRules := int(natRulesMetric)
expectedNatRules := countRules(utiliptables.TableNAT, fp.iptablesData.String())
if nNatRules != expectedNatRules {
t.Fatalf("Wrong number of nat rules: expected %d received %d", expectedNatRules, nNatRules)
}
}
func TestClusterIPReject(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "cluster IP rejected",
sourceIP: "10.0.0.2",
destIP: "172.30.0.41",
destPort: 80,
output: "REJECT",
},
})
}
func TestClusterIPEndpointsJump(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
}}
}),
)
epIP := "10.180.0.1"
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -j KUBE-SEP-SXIVWICOYRO3J4NJ
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "cluster IP accepted",
sourceIP: "10.180.0.2",
destIP: "172.30.0.41",
destPort: 80,
output: "10.180.0.1:80",
masq: false,
},
{
name: "hairpin to cluster IP",
sourceIP: "10.180.0.1",
destIP: "172.30.0.41",
destPort: 80,
output: "10.180.0.1:80",
masq: true,
},
})
}
func TestLoadBalancer(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcNodePort := 3001
svcLBIP1 := "1.2.3.4"
svcLBIP2 := "5.6.7.8"
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(svcNodePort),
}}
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{
{IP: svcLBIP1},
{IP: svcLBIP2},
}
svc.Spec.LoadBalancerSourceRanges = []string{
"192.168.0.0/24",
// Regression test that excess whitespace gets ignored
" 203.0.113.0/25",
}
}),
)
epIP := "10.180.0.1"
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A KUBE-PROXY-FIREWALL -m comment --comment "ns1/svc1:p80 traffic not accepted by KUBE-FW-XPGD46QRK7WJZT7O" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j DROP
-A KUBE-PROXY-FIREWALL -m comment --comment "ns1/svc1:p80 traffic not accepted by KUBE-FW-XPGD46QRK7WJZT7O" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j DROP
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-XPGD46QRK7WJZT7O - [0:0]
:KUBE-FW-XPGD46QRK7WJZT7O - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-NODEPORTS -m comment --comment ns1/svc1:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-FW-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 loadbalancer IP" -m tcp -p tcp -d 5.6.7.8 --dport 80 -j KUBE-FW-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "masquerade traffic for ns1/svc1:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-XPGD46QRK7WJZT7O -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-FW-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 loadbalancer IP" -s 192.168.0.0/24 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-FW-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 loadbalancer IP" -s 203.0.113.0/25 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-FW-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 loadbalancer IP" -s 1.2.3.4 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-FW-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 loadbalancer IP" -s 5.6.7.8 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -j KUBE-SEP-SXIVWICOYRO3J4NJ
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "pod to cluster IP",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: false,
},
{
name: "external to nodePort",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "nodePort bypasses LoadBalancerSourceRanges",
sourceIP: testExternalClientBlocked,
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "accepted external to LB1",
sourceIP: testExternalClient,
destIP: svcLBIP1,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "accepted external to LB2",
sourceIP: testExternalClient,
destIP: svcLBIP2,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "blocked external to LB1",
sourceIP: testExternalClientBlocked,
destIP: svcLBIP1,
destPort: svcPort,
output: "DROP",
},
{
name: "blocked external to LB2",
sourceIP: testExternalClientBlocked,
destIP: svcLBIP2,
destPort: svcPort,
output: "DROP",
},
{
name: "pod to LB1 (blocked by LoadBalancerSourceRanges)",
sourceIP: "10.0.0.2",
destIP: svcLBIP1,
destPort: svcPort,
output: "DROP",
},
{
name: "pod to LB2 (blocked by LoadBalancerSourceRanges)",
sourceIP: "10.0.0.2",
destIP: svcLBIP2,
destPort: svcPort,
output: "DROP",
},
{
name: "node to LB1 (allowed by LoadBalancerSourceRanges)",
sourceIP: testNodeIP,
destIP: svcLBIP1,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "node to LB2 (allowed by LoadBalancerSourceRanges)",
sourceIP: testNodeIP,
destIP: svcLBIP2,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
// The LB rules assume that when you connect from a node to a LB IP, that
// something external to kube-proxy will cause the connection to be
// SNATted to the LB IP, so if the LoadBalancerSourceRanges include the
// node IP, then we add a rule allowing traffic from the LB IP as well...
{
name: "same node to LB1, SNATted to LB1 (implicitly allowed)",
sourceIP: svcLBIP1,
destIP: svcLBIP1,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "same node to LB2, SNATted to LB2 (implicitly allowed)",
sourceIP: svcLBIP2,
destIP: svcLBIP2,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
})
}
func TestNodePort(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcNodePort := 3001
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "NodePort"
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(svcNodePort),
}}
}),
)
epIP := "10.180.0.1"
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-XPGD46QRK7WJZT7O - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-NODEPORTS -m comment --comment ns1/svc1:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "masquerade traffic for ns1/svc1:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-XPGD46QRK7WJZT7O -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -j KUBE-SEP-SXIVWICOYRO3J4NJ
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "pod to cluster IP",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: false,
},
{
name: "external to nodePort",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "node to nodePort",
sourceIP: testNodeIP,
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
{
name: "localhost to nodePort gets masqueraded",
sourceIP: "127.0.0.1",
destIP: "127.0.0.1",
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP, svcPort),
masq: true,
},
})
}
func TestHealthCheckNodePort(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.nodePortAddresses = []string{"127.0.0.0/8"}
svcIP := "172.30.0.42"
svcPort := 80
svcNodePort := 3001
svcHealthCheckNodePort := 30000
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
svc := makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(svcNodePort),
}}
svc.Spec.HealthCheckNodePort = int32(svcHealthCheckNodePort)
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
})
makeServiceMap(fp, svc)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.42 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m addrtype --dst-type LOCAL -m tcp -p tcp --dport 3001 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -d 127.0.0.1 -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "firewall accepts HealthCheckNodePort",
sourceIP: "1.2.3.4",
destIP: testNodeIP,
destPort: svcHealthCheckNodePort,
output: "ACCEPT",
masq: false,
},
})
fp.OnServiceDelete(svc)
fp.syncProxyRules()
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "HealthCheckNodePort no longer has any rule",
sourceIP: "1.2.3.4",
destIP: testNodeIP,
destPort: svcHealthCheckNodePort,
output: "",
},
})
}
func TestMasqueradeRule(t *testing.T) {
for _, testcase := range []bool{false, true} {
ipt := iptablestest.NewFake().SetHasRandomFully(testcase)
fp := NewFakeProxier(ipt)
fp.syncProxyRules()
expectedFmt := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE%s
COMMIT
`)
var expected string
if testcase {
expected = fmt.Sprintf(expectedFmt, " --random-fully")
} else {
expected = fmt.Sprintf(expectedFmt, "")
}
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
}
}
func TestExternalIPsReject(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcExternalIPs := "192.168.99.11"
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "ClusterIP"
svc.Spec.ClusterIP = svcIP
svc.Spec.ExternalIPs = []string{svcExternalIPs}
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
TargetPort: intstr.FromInt(svcPort),
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m tcp -p tcp -d 192.168.99.11 --dport 80 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "cluster IP with no endpoints",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: "REJECT",
},
{
name: "external IP with no endpoints",
sourceIP: testExternalClient,
destIP: svcExternalIPs,
destPort: svcPort,
output: "REJECT",
},
})
}
func TestOnlyLocalExternalIPs(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcExternalIPs := "192.168.99.11"
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "NodePort"
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Spec.ClusterIP = svcIP
svc.Spec.ExternalIPs = []string{svcExternalIPs}
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
TargetPort: intstr.FromInt(svcPort),
}}
}),
)
epIP1 := "10.180.0.1"
epIP2 := "10.180.2.1"
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP1},
}, {
Addresses: []string{epIP2},
NodeName: pointer.String(testHostname),
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-XPGD46QRK7WJZT7O - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-ZX7GRIZKSNUQ3LAJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
:KUBE-SVL-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 external IP" -m tcp -p tcp -d 192.168.99.11 --dport 80 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "pod traffic for ns1/svc1:p80 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "masquerade LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "route LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-EXT-XPGD46QRK7WJZT7O -j KUBE-SVL-XPGD46QRK7WJZT7O
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -s 10.180.2.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.2.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
-A KUBE-SVL-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "cluster IP hits both endpoints",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: fmt.Sprintf("%s:%d, %s:%d", epIP1, svcPort, epIP2, svcPort),
masq: false,
},
{
name: "external IP hits only local endpoint, unmasqueraded",
sourceIP: testExternalClient,
destIP: svcExternalIPs,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP2, svcPort),
masq: false,
},
})
}
// TestNonLocalExternalIPs tests if we add the masquerade rule into svcChain in order to
// SNAT packets to external IPs if externalTrafficPolicy is cluster and the traffic is NOT Local.
func TestNonLocalExternalIPs(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcExternalIPs := "192.168.99.11"
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.ClusterIP = svcIP
svc.Spec.ExternalIPs = []string{svcExternalIPs}
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
TargetPort: intstr.FromInt(svcPort),
}}
}),
)
epIP1 := "10.180.0.1"
epIP2 := "10.180.2.1"
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP1},
NodeName: nil,
}, {
Addresses: []string{epIP2},
NodeName: pointer.String(testHostname),
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-XPGD46QRK7WJZT7O - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-ZX7GRIZKSNUQ3LAJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 external IP" -m tcp -p tcp -d 192.168.99.11 --dport 80 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "masquerade traffic for ns1/svc1:p80 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-XPGD46QRK7WJZT7O -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -s 10.180.2.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.2.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "pod to cluster IP",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: fmt.Sprintf("%s:%d, %s:%d", epIP1, svcPort, epIP2, svcPort),
masq: false,
},
{
name: "external to external IP",
sourceIP: testExternalClient,
destIP: svcExternalIPs,
destPort: svcPort,
output: fmt.Sprintf("%s:%d, %s:%d", epIP1, svcPort, epIP2, svcPort),
masq: true,
},
})
}
func TestNodePortReject(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcNodePort := 3001
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "NodePort"
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(svcNodePort),
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m addrtype --dst-type LOCAL -m tcp -p tcp --dport 3001 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "pod to cluster IP",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: "REJECT",
},
{
name: "pod to NodePort",
sourceIP: "10.0.0.2",
destIP: testNodeIP,
destPort: svcNodePort,
output: "REJECT",
},
{
name: "external to NodePort",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: svcNodePort,
output: "REJECT",
},
})
}
func TestLoadBalancerReject(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcNodePort := 3001
svcHealthCheckNodePort := 30000
svcLBIP := "1.2.3.4"
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
svcSessionAffinityTimeout := int32(10800)
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(svcNodePort),
}}
svc.Spec.HealthCheckNodePort = int32(svcHealthCheckNodePort)
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: svcLBIP,
}}
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Spec.SessionAffinity = v1.ServiceAffinityClientIP
svc.Spec.SessionAffinityConfig = &v1.SessionAffinityConfig{
ClientIP: &v1.ClientIPConfig{TimeoutSeconds: &svcSessionAffinityTimeout},
}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1:p80 has no endpoints" -m addrtype --dst-type LOCAL -m tcp -p tcp --dport 3001 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "pod to cluster IP",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: "REJECT",
},
{
name: "pod to LoadBalancer IP",
sourceIP: "10.0.0.2",
destIP: svcLBIP,
destPort: svcPort,
output: "REJECT",
},
{
name: "external to LoadBalancer IP",
sourceIP: testExternalClient,
destIP: svcLBIP,
destPort: svcPort,
output: "REJECT",
},
})
}
func TestOnlyLocalLoadBalancing(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
svcIP := "172.30.0.41"
svcPort := 80
svcNodePort := 3001
svcHealthCheckNodePort := 30000
svcLBIP := "1.2.3.4"
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
svcSessionAffinityTimeout := int32(10800)
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(svcNodePort),
}}
svc.Spec.HealthCheckNodePort = int32(svcHealthCheckNodePort)
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: svcLBIP,
}}
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Spec.SessionAffinity = v1.ServiceAffinityClientIP
svc.Spec.SessionAffinityConfig = &v1.SessionAffinityConfig{
ClientIP: &v1.ClientIPConfig{TimeoutSeconds: &svcSessionAffinityTimeout},
}
}),
)
epIP1 := "10.180.0.1"
epIP2 := "10.180.2.1"
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP1},
}, {
Addresses: []string{epIP2},
NodeName: pointer.String(testHostname),
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1:p80 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-XPGD46QRK7WJZT7O - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-ZX7GRIZKSNUQ3LAJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
:KUBE-SVL-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-NODEPORTS -m comment --comment ns1/svc1:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "pod traffic for ns1/svc1:p80 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "masquerade LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "route LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-EXT-XPGD46QRK7WJZT7O -j KUBE-SVL-XPGD46QRK7WJZT7O
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m recent --name KUBE-SEP-SXIVWICOYRO3J4NJ --set -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -s 10.180.2.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -m recent --name KUBE-SEP-ZX7GRIZKSNUQ3LAJ --set -m tcp -p tcp -j DNAT --to-destination 10.180.2.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -m recent --name KUBE-SEP-SXIVWICOYRO3J4NJ --rcheck --seconds 10800 --reap -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -m recent --name KUBE-SEP-ZX7GRIZKSNUQ3LAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
-A KUBE-SVL-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -m recent --name KUBE-SEP-ZX7GRIZKSNUQ3LAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
-A KUBE-SVL-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
runPacketFlowTests(t, getLine(), ipt, testNodeIP, []packetFlowTest{
{
name: "pod to cluster IP hits both endpoints",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: fmt.Sprintf("%s:%d, %s:%d", epIP1, svcPort, epIP2, svcPort),
masq: false,
},
{
name: "external to LB IP hits only local endpoint, unmasqueraded",
sourceIP: testExternalClient,
destIP: svcLBIP,
destPort: svcPort,
output: fmt.Sprintf("%s:%d", epIP2, svcPort),
masq: false,
},
{
name: "external to NodePort hits only local endpoint, unmasqueraded",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP2, svcPort),
masq: false,
},
})
}
func TestOnlyLocalNodePortsNoClusterCIDR(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.localDetector = proxyutiliptables.NewNoOpLocalDetector()
fp.nodePortAddresses = []string{"192.168.0.0/24"}
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-XPGD46QRK7WJZT7O - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-ZX7GRIZKSNUQ3LAJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
:KUBE-SVL-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-NODEPORTS -m comment --comment ns1/svc1:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -d 192.168.0.2 -j KUBE-NODEPORTS
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "masquerade LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "route LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-EXT-XPGD46QRK7WJZT7O -j KUBE-SVL-XPGD46QRK7WJZT7O
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -s 10.180.2.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.2.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
-A KUBE-SVL-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
COMMIT
`)
onlyLocalNodePorts(t, fp, ipt, expected, getLine())
}
func TestOnlyLocalNodePorts(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.nodePortAddresses = []string{"192.168.0.0/24"}
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-XPGD46QRK7WJZT7O - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SXIVWICOYRO3J4NJ - [0:0]
:KUBE-SEP-ZX7GRIZKSNUQ3LAJ - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
:KUBE-SVL-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-NODEPORTS -m comment --comment ns1/svc1:p80 -m tcp -p tcp --dport 3001 -j KUBE-EXT-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -d 192.168.0.2 -j KUBE-NODEPORTS
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "pod traffic for ns1/svc1:p80 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "masquerade LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-XPGD46QRK7WJZT7O -m comment --comment "route LOCAL traffic for ns1/svc1:p80 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-EXT-XPGD46QRK7WJZT7O -j KUBE-SVL-XPGD46QRK7WJZT7O
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -s 10.180.0.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SXIVWICOYRO3J4NJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.0.1:80
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -s 10.180.2.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-ZX7GRIZKSNUQ3LAJ -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.180.2.1:80
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.0.1:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-SXIVWICOYRO3J4NJ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
-A KUBE-SVL-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.180.2.1:80" -j KUBE-SEP-ZX7GRIZKSNUQ3LAJ
COMMIT
`)
onlyLocalNodePorts(t, fp, ipt, expected, getLine())
}
func onlyLocalNodePorts(t *testing.T, fp *Proxier, ipt *iptablestest.FakeIPTables, expected string, line int) {
svcIP := "172.30.0.41"
svcPort := 80
svcNodePort := 3001
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.Type = "NodePort"
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(svcNodePort),
}}
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
}),
)
epIP1 := "10.180.0.1"
epIP2 := "10.180.2.1"
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP1},
NodeName: nil,
}, {
Addresses: []string{epIP2},
NodeName: pointer.String(testHostname),
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
assertIPTablesRulesEqual(t, line, expected, fp.iptablesData.String())
runPacketFlowTests(t, line, ipt, testNodeIP, []packetFlowTest{
{
name: "pod to cluster IP hit both endpoints",
sourceIP: "10.0.0.2",
destIP: svcIP,
destPort: svcPort,
output: fmt.Sprintf("%s:%d, %s:%d", epIP1, svcPort, epIP2, svcPort),
masq: false,
},
{
name: "external to NodePort hits only local endpoint",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP2, svcPort),
masq: false,
},
{
name: "pod to localhost doesn't work because localhost is not in nodePortAddresses",
sourceIP: "10.0.0.2",
destIP: "127.0.0.1",
destPort: svcNodePort,
output: "",
},
})
if fp.localDetector.IsImplemented() {
// pod-to-NodePort is treated as internal traffic, so we see both endpoints
runPacketFlowTests(t, line, ipt, testNodeIP, []packetFlowTest{
{
name: "pod to NodePort hits both endpoints",
sourceIP: "10.0.0.2",
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d, %s:%d", epIP1, svcPort, epIP2, svcPort),
masq: false,
},
})
} else {
// pod-to-NodePort is (incorrectly) treated as external traffic
// when there is no LocalTrafficDetector.
runPacketFlowTests(t, line, ipt, testNodeIP, []packetFlowTest{
{
name: "pod to NodePort hits only local endpoint",
sourceIP: "10.0.0.2",
destIP: testNodeIP,
destPort: svcNodePort,
output: fmt.Sprintf("%s:%d", epIP2, svcPort),
masq: false,
},
})
}
}
func TestComputeProbability(t *testing.T) {
expectedProbabilities := map[int]string{
1: "1.0000000000",
2: "0.5000000000",
10: "0.1000000000",
100: "0.0100000000",
1000: "0.0010000000",
10000: "0.0001000000",
100000: "0.0000100000",
100001: "0.0000099999",
}
for num, expected := range expectedProbabilities {
actual := computeProbability(num)
if actual != expected {
t.Errorf("Expected computeProbability(%d) to be %s, got: %s", num, expected, actual)
}
}
prevProbability := float64(0)
for i := 100000; i > 1; i-- {
currProbability, err := strconv.ParseFloat(computeProbability(i), 64)
if err != nil {
t.Fatalf("Error parsing float probability for %d: %v", i, err)
}
if currProbability <= prevProbability {
t.Fatalf("Probability unexpectedly <= to previous probability for %d: (%0.10f <= %0.10f)", i, currProbability, prevProbability)
}
prevProbability = currProbability
}
}
func makeTestService(namespace, name string, svcFunc func(*v1.Service)) *v1.Service {
svc := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: name,
Namespace: namespace,
Annotations: map[string]string{},
},
Spec: v1.ServiceSpec{},
Status: v1.ServiceStatus{},
}
svcFunc(svc)
return svc
}
func addTestPort(array []v1.ServicePort, name string, protocol v1.Protocol, port, nodeport int32, targetPort int) []v1.ServicePort {
svcPort := v1.ServicePort{
Name: name,
Protocol: protocol,
Port: port,
NodePort: nodeport,
TargetPort: intstr.FromInt(targetPort),
}
return append(array, svcPort)
}
func TestBuildServiceMapAddRemove(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
services := []*v1.Service{
makeTestService("somewhere-else", "cluster-ip", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.55.4"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "something", "UDP", 1234, 4321, 0)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "somethingelse", "UDP", 1235, 5321, 0)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "sctpport", "SCTP", 1236, 6321, 0)
}),
makeTestService("somewhere-else", "node-port", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeNodePort
svc.Spec.ClusterIP = "172.30.55.10"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "blahblah", "UDP", 345, 678, 0)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "moreblahblah", "TCP", 344, 677, 0)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "muchmoreblah", "SCTP", 343, 676, 0)
}),
makeTestService("somewhere", "load-balancer", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeLoadBalancer
svc.Spec.ClusterIP = "172.30.55.11"
svc.Spec.LoadBalancerIP = "1.2.3.4"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "foobar", "UDP", 8675, 30061, 7000)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "baz", "UDP", 8676, 30062, 7001)
svc.Status.LoadBalancer = v1.LoadBalancerStatus{
Ingress: []v1.LoadBalancerIngress{
{IP: "1.2.3.4"},
},
}
}),
makeTestService("somewhere", "only-local-load-balancer", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeLoadBalancer
svc.Spec.ClusterIP = "172.30.55.12"
svc.Spec.LoadBalancerIP = "5.6.7.8"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "foobar2", "UDP", 8677, 30063, 7002)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "baz", "UDP", 8678, 30064, 7003)
svc.Status.LoadBalancer = v1.LoadBalancerStatus{
Ingress: []v1.LoadBalancerIngress{
{IP: "5.6.7.8"},
},
}
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Spec.HealthCheckNodePort = 345
}),
}
for i := range services {
fp.OnServiceAdd(services[i])
}
result := fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 10 {
t.Errorf("expected service map length 10, got %v", fp.serviceMap)
}
// The only-local-loadbalancer ones get added
if len(result.HCServiceNodePorts) != 1 {
t.Errorf("expected 1 healthcheck port, got %v", result.HCServiceNodePorts)
} else {
nsn := makeNSN("somewhere", "only-local-load-balancer")
if port, found := result.HCServiceNodePorts[nsn]; !found || port != 345 {
t.Errorf("expected healthcheck port [%q]=345: got %v", nsn, result.HCServiceNodePorts)
}
}
if len(result.UDPStaleClusterIP) != 0 {
// Services only added, so nothing stale yet
t.Errorf("expected stale UDP services length 0, got %d", len(result.UDPStaleClusterIP))
}
// Remove some stuff
// oneService is a modification of services[0] with removed first port.
oneService := makeTestService("somewhere-else", "cluster-ip", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.55.4"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "somethingelse", "UDP", 1235, 5321, 0)
})
fp.OnServiceUpdate(services[0], oneService)
fp.OnServiceDelete(services[1])
fp.OnServiceDelete(services[2])
fp.OnServiceDelete(services[3])
result = fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 1 {
t.Errorf("expected service map length 1, got %v", fp.serviceMap)
}
if len(result.HCServiceNodePorts) != 0 {
t.Errorf("expected 0 healthcheck ports, got %v", result.HCServiceNodePorts)
}
// All services but one were deleted. While you'd expect only the ClusterIPs
// from the three deleted services here, we still have the ClusterIP for
// the not-deleted service, because one of it's ServicePorts was deleted.
expectedStaleUDPServices := []string{"172.30.55.10", "172.30.55.4", "172.30.55.11", "172.30.55.12"}
if len(result.UDPStaleClusterIP) != len(expectedStaleUDPServices) {
t.Errorf("expected stale UDP services length %d, got %v", len(expectedStaleUDPServices), result.UDPStaleClusterIP.UnsortedList())
}
for _, ip := range expectedStaleUDPServices {
if !result.UDPStaleClusterIP.Has(ip) {
t.Errorf("expected stale UDP service service %s", ip)
}
}
}
func TestBuildServiceMapServiceHeadless(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
makeServiceMap(fp,
makeTestService("somewhere-else", "headless", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = v1.ClusterIPNone
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "rpc", "UDP", 1234, 0, 0)
}),
makeTestService("somewhere-else", "headless-without-port", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = v1.ClusterIPNone
}),
)
// Headless service should be ignored
result := fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 0 {
t.Errorf("expected service map length 0, got %d", len(fp.serviceMap))
}
// No proxied services, so no healthchecks
if len(result.HCServiceNodePorts) != 0 {
t.Errorf("expected healthcheck ports length 0, got %d", len(result.HCServiceNodePorts))
}
if len(result.UDPStaleClusterIP) != 0 {
t.Errorf("expected stale UDP services length 0, got %d", len(result.UDPStaleClusterIP))
}
}
func TestBuildServiceMapServiceTypeExternalName(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
makeServiceMap(fp,
makeTestService("somewhere-else", "external-name", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeExternalName
svc.Spec.ClusterIP = "172.30.55.4" // Should be ignored
svc.Spec.ExternalName = "foo2.bar.com"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "blah", "UDP", 1235, 5321, 0)
}),
)
result := fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 0 {
t.Errorf("expected service map length 0, got %v", fp.serviceMap)
}
// No proxied services, so no healthchecks
if len(result.HCServiceNodePorts) != 0 {
t.Errorf("expected healthcheck ports length 0, got %v", result.HCServiceNodePorts)
}
if len(result.UDPStaleClusterIP) != 0 {
t.Errorf("expected stale UDP services length 0, got %v", result.UDPStaleClusterIP)
}
}
func TestBuildServiceMapServiceUpdate(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
servicev1 := makeTestService("somewhere", "some-service", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.55.4"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "something", "UDP", 1234, 4321, 0)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "somethingelse", "TCP", 1235, 5321, 0)
})
servicev2 := makeTestService("somewhere", "some-service", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeLoadBalancer
svc.Spec.ClusterIP = "172.30.55.4"
svc.Spec.LoadBalancerIP = "1.2.3.4"
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "something", "UDP", 1234, 4321, 7002)
svc.Spec.Ports = addTestPort(svc.Spec.Ports, "somethingelse", "TCP", 1235, 5321, 7003)
svc.Status.LoadBalancer = v1.LoadBalancerStatus{
Ingress: []v1.LoadBalancerIngress{
{IP: "1.2.3.4"},
},
}
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Spec.HealthCheckNodePort = 345
})
fp.OnServiceAdd(servicev1)
result := fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 2 {
t.Errorf("expected service map length 2, got %v", fp.serviceMap)
}
if len(result.HCServiceNodePorts) != 0 {
t.Errorf("expected healthcheck ports length 0, got %v", result.HCServiceNodePorts)
}
if len(result.UDPStaleClusterIP) != 0 {
// Services only added, so nothing stale yet
t.Errorf("expected stale UDP services length 0, got %d", len(result.UDPStaleClusterIP))
}
// Change service to load-balancer
fp.OnServiceUpdate(servicev1, servicev2)
result = fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 2 {
t.Errorf("expected service map length 2, got %v", fp.serviceMap)
}
if len(result.HCServiceNodePorts) != 1 {
t.Errorf("expected healthcheck ports length 1, got %v", result.HCServiceNodePorts)
}
if len(result.UDPStaleClusterIP) != 0 {
t.Errorf("expected stale UDP services length 0, got %v", result.UDPStaleClusterIP.UnsortedList())
}
// No change; make sure the service map stays the same and there are
// no health-check changes
fp.OnServiceUpdate(servicev2, servicev2)
result = fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 2 {
t.Errorf("expected service map length 2, got %v", fp.serviceMap)
}
if len(result.HCServiceNodePorts) != 1 {
t.Errorf("expected healthcheck ports length 1, got %v", result.HCServiceNodePorts)
}
if len(result.UDPStaleClusterIP) != 0 {
t.Errorf("expected stale UDP services length 0, got %v", result.UDPStaleClusterIP.UnsortedList())
}
// And back to ClusterIP
fp.OnServiceUpdate(servicev2, servicev1)
result = fp.serviceMap.Update(fp.serviceChanges)
if len(fp.serviceMap) != 2 {
t.Errorf("expected service map length 2, got %v", fp.serviceMap)
}
if len(result.HCServiceNodePorts) != 0 {
t.Errorf("expected healthcheck ports length 0, got %v", result.HCServiceNodePorts)
}
if len(result.UDPStaleClusterIP) != 0 {
// Services only added, so nothing stale yet
t.Errorf("expected stale UDP services length 0, got %d", len(result.UDPStaleClusterIP))
}
}
func populateEndpointSlices(proxier *Proxier, allEndpointSlices ...*discovery.EndpointSlice) {
for i := range allEndpointSlices {
proxier.OnEndpointSliceAdd(allEndpointSlices[i])
}
}
func makeTestEndpointSlice(namespace, name string, sliceNum int, epsFunc func(*discovery.EndpointSlice)) *discovery.EndpointSlice {
eps := &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-%d", name, sliceNum),
Namespace: namespace,
Labels: map[string]string{discovery.LabelServiceName: name},
},
}
epsFunc(eps)
return eps
}
func makeNSN(namespace, name string) types.NamespacedName {
return types.NamespacedName{Namespace: namespace, Name: name}
}
func makeServicePortName(ns, name, port string, protocol v1.Protocol) proxy.ServicePortName {
return proxy.ServicePortName{
NamespacedName: makeNSN(ns, name),
Port: port,
Protocol: protocol,
}
}
func makeServiceMap(proxier *Proxier, allServices ...*v1.Service) {
for i := range allServices {
proxier.OnServiceAdd(allServices[i])
}
proxier.mu.Lock()
defer proxier.mu.Unlock()
proxier.servicesSynced = true
}
func compareEndpointsMapsExceptChainName(t *testing.T, tci int, newMap proxy.EndpointsMap, expected map[proxy.ServicePortName][]*endpointsInfo) {
if len(newMap) != len(expected) {
t.Errorf("[%d] expected %d results, got %d: %v", tci, len(expected), len(newMap), newMap)
}
for x := range expected {
if len(newMap[x]) != len(expected[x]) {
t.Errorf("[%d] expected %d endpoints for %v, got %d", tci, len(expected[x]), x, len(newMap[x]))
} else {
for i := range expected[x] {
newEp, ok := newMap[x][i].(*endpointsInfo)
if !ok {
t.Errorf("Failed to cast endpointsInfo")
continue
}
if newEp.Endpoint != expected[x][i].Endpoint ||
newEp.IsLocal != expected[x][i].IsLocal {
t.Errorf("[%d] expected new[%v][%d] to be %v, got %v", tci, x, i, expected[x][i], newEp)
}
}
}
}
}
func TestUpdateEndpointsMap(t *testing.T) {
var nodeName = testHostname
udpProtocol := v1.ProtocolUDP
emptyEndpointSlices := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, func(*discovery.EndpointSlice) {}),
}
subset1 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11"),
Port: pointer.Int32(11),
Protocol: &udpProtocol,
}}
}
subset2 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.2"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p12"),
Port: pointer.Int32(12),
Protocol: &udpProtocol,
}}
}
namedPortLocal := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1,
func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11"),
Port: pointer.Int32(11),
Protocol: &udpProtocol,
}}
}),
}
namedPort := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, subset1),
}
namedPortRenamed := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1,
func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11-2"),
Port: pointer.Int32(11),
Protocol: &udpProtocol,
}}
}),
}
namedPortRenumbered := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1,
func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11"),
Port: pointer.Int32(22),
Protocol: &udpProtocol,
}}
}),
}
namedPortsLocalNoLocal := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1,
func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
}, {
Addresses: []string{"10.1.1.2"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11"),
Port: pointer.Int32(11),
Protocol: &udpProtocol,
}, {
Name: pointer.String("p12"),
Port: pointer.Int32(12),
Protocol: &udpProtocol,
}}
}),
}
multipleSubsets := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, subset1),
makeTestEndpointSlice("ns1", "ep1", 2, subset2),
}
subsetLocal := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.2"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p12"),
Port: pointer.Int32(12),
Protocol: &udpProtocol,
}}
}
multipleSubsetsWithLocal := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, subset1),
makeTestEndpointSlice("ns1", "ep1", 2, subsetLocal),
}
subsetMultiplePortsLocal := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11"),
Port: pointer.Int32(11),
Protocol: &udpProtocol,
}, {
Name: pointer.String("p12"),
Port: pointer.Int32(12),
Protocol: &udpProtocol,
}}
}
subset3 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.3"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p13"),
Port: pointer.Int32(13),
Protocol: &udpProtocol,
}}
}
multipleSubsetsMultiplePortsLocal := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, subsetMultiplePortsLocal),
makeTestEndpointSlice("ns1", "ep1", 2, subset3),
}
subsetMultipleIPsPorts1 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
}, {
Addresses: []string{"10.1.1.2"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11"),
Port: pointer.Int32(11),
Protocol: &udpProtocol,
}, {
Name: pointer.String("p12"),
Port: pointer.Int32(12),
Protocol: &udpProtocol,
}}
}
subsetMultipleIPsPorts2 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.3"},
}, {
Addresses: []string{"10.1.1.4"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p13"),
Port: pointer.Int32(13),
Protocol: &udpProtocol,
}, {
Name: pointer.String("p14"),
Port: pointer.Int32(14),
Protocol: &udpProtocol,
}}
}
subsetMultipleIPsPorts3 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.2.2.1"},
}, {
Addresses: []string{"10.2.2.2"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p21"),
Port: pointer.Int32(21),
Protocol: &udpProtocol,
}, {
Name: pointer.String("p22"),
Port: pointer.Int32(22),
Protocol: &udpProtocol,
}}
}
multipleSubsetsIPsPorts := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, subsetMultipleIPsPorts1),
makeTestEndpointSlice("ns1", "ep1", 2, subsetMultipleIPsPorts2),
makeTestEndpointSlice("ns2", "ep2", 1, subsetMultipleIPsPorts3),
}
complexSubset1 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.2.2.2"},
NodeName: &nodeName,
}, {
Addresses: []string{"10.2.2.22"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p22"),
Port: pointer.Int32(22),
Protocol: &udpProtocol,
}}
}
complexSubset2 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.2.2.3"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p23"),
Port: pointer.Int32(23),
Protocol: &udpProtocol,
}}
}
complexSubset3 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.4.4.4"},
NodeName: &nodeName,
}, {
Addresses: []string{"10.4.4.5"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p44"),
Port: pointer.Int32(44),
Protocol: &udpProtocol,
}}
}
complexSubset4 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.4.4.6"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p45"),
Port: pointer.Int32(45),
Protocol: &udpProtocol,
}}
}
complexSubset5 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.1"},
}, {
Addresses: []string{"10.1.1.11"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p11"),
Port: pointer.Int32(11),
Protocol: &udpProtocol,
}}
}
complexSubset6 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.1.1.2"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p12"),
Port: pointer.Int32(12),
Protocol: &udpProtocol,
}, {
Name: pointer.String("p122"),
Port: pointer.Int32(122),
Protocol: &udpProtocol,
}}
}
complexSubset7 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.3.3.3"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p33"),
Port: pointer.Int32(33),
Protocol: &udpProtocol,
}}
}
complexSubset8 := func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.4.4.4"},
NodeName: &nodeName,
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p44"),
Port: pointer.Int32(44),
Protocol: &udpProtocol,
}}
}
complexBefore := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, subset1),
nil,
makeTestEndpointSlice("ns2", "ep2", 1, complexSubset1),
makeTestEndpointSlice("ns2", "ep2", 2, complexSubset2),
nil,
makeTestEndpointSlice("ns4", "ep4", 1, complexSubset3),
makeTestEndpointSlice("ns4", "ep4", 2, complexSubset4),
}
complexAfter := []*discovery.EndpointSlice{
makeTestEndpointSlice("ns1", "ep1", 1, complexSubset5),
makeTestEndpointSlice("ns1", "ep1", 2, complexSubset6),
nil,
nil,
makeTestEndpointSlice("ns3", "ep3", 1, complexSubset7),
makeTestEndpointSlice("ns4", "ep4", 1, complexSubset8),
nil,
}
testCases := []struct {
// previousEndpoints and currentEndpoints are used to call appropriate
// handlers OnEndpoints* (based on whether corresponding values are nil
// or non-nil) and must be of equal length.
name string
previousEndpoints []*discovery.EndpointSlice
currentEndpoints []*discovery.EndpointSlice
oldEndpoints map[proxy.ServicePortName][]*endpointsInfo
expectedResult map[proxy.ServicePortName][]*endpointsInfo
expectedStaleEndpoints []proxy.ServiceEndpoint
expectedStaleServiceNames map[proxy.ServicePortName]bool
expectedHealthchecks map[types.NamespacedName]int
}{{
// Case[0]: nothing
name: "nothing",
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{},
}, {
// Case[1]: no change, named port, local
name: "no change, named port, local",
previousEndpoints: namedPortLocal,
currentEndpoints: namedPortLocal,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{
makeNSN("ns1", "ep1"): 1,
},
}, {
// Case[2]: no change, multiple subsets
name: "no change, multiple subsets",
previousEndpoints: multipleSubsets,
currentEndpoints: multipleSubsets,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{},
}, {
// Case[3]: no change, multiple subsets, multiple ports, local
name: "no change, multiple subsets, multiple ports, local",
previousEndpoints: multipleSubsetsMultiplePortsLocal,
currentEndpoints: multipleSubsetsMultiplePortsLocal,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:12", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p13", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.3:13", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:12", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p13", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.3:13", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{
makeNSN("ns1", "ep1"): 1,
},
}, {
// Case[4]: no change, multiple endpoints, subsets, IPs, and ports
name: "no change, multiple endpoints, subsets, IPs, and ports",
previousEndpoints: multipleSubsetsIPsPorts,
currentEndpoints: multipleSubsetsIPsPorts,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p13", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.3:13", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.4:13", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p14", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.3:14", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.4:14", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns2", "ep2", "p21", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.1:21", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.2:21", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns2", "ep2", "p22", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.1:22", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.2:22", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p13", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.3:13", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.4:13", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p14", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.3:14", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.4:14", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns2", "ep2", "p21", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.1:21", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.2:21", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns2", "ep2", "p22", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.1:22", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.2:22", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{
makeNSN("ns1", "ep1"): 2,
makeNSN("ns2", "ep2"): 1,
},
}, {
// Case[5]: add an Endpoints
name: "add an Endpoints",
previousEndpoints: []*discovery.EndpointSlice{nil},
currentEndpoints: namedPortLocal,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): true,
},
expectedHealthchecks: map[types.NamespacedName]int{
makeNSN("ns1", "ep1"): 1,
},
}, {
// Case[6]: remove an Endpoints
name: "remove an Endpoints",
previousEndpoints: namedPortLocal,
currentEndpoints: []*discovery.EndpointSlice{nil},
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{},
expectedStaleEndpoints: []proxy.ServiceEndpoint{{
Endpoint: "10.1.1.1:11",
ServicePortName: makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP),
}},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{},
}, {
// Case[7]: add an IP and port
name: "add an IP and port",
previousEndpoints: namedPort,
currentEndpoints: namedPortsLocalNoLocal,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): true,
},
expectedHealthchecks: map[types.NamespacedName]int{
makeNSN("ns1", "ep1"): 1,
},
}, {
// Case[8]: remove an IP and port
name: "remove an IP and port",
previousEndpoints: namedPortsLocalNoLocal,
currentEndpoints: namedPort,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:11", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{{
Endpoint: "10.1.1.2:11",
ServicePortName: makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP),
}, {
Endpoint: "10.1.1.1:12",
ServicePortName: makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP),
}, {
Endpoint: "10.1.1.2:12",
ServicePortName: makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP),
}},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{},
}, {
// Case[9]: add a subset
name: "add a subset",
previousEndpoints: []*discovery.EndpointSlice{namedPort[0], nil},
currentEndpoints: multipleSubsetsWithLocal,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): true,
},
expectedHealthchecks: map[types.NamespacedName]int{
makeNSN("ns1", "ep1"): 1,
},
}, {
// Case[10]: remove a subset
name: "remove a subset",
previousEndpoints: multipleSubsets,
currentEndpoints: []*discovery.EndpointSlice{namedPort[0], nil},
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{{
Endpoint: "10.1.1.2:12",
ServicePortName: makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP),
}},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{},
}, {
// Case[11]: rename a port
name: "rename a port",
previousEndpoints: namedPort,
currentEndpoints: namedPortRenamed,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11-2", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{{
Endpoint: "10.1.1.1:11",
ServicePortName: makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP),
}},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{
makeServicePortName("ns1", "ep1", "p11-2", v1.ProtocolUDP): true,
},
expectedHealthchecks: map[types.NamespacedName]int{},
}, {
// Case[12]: renumber a port
name: "renumber a port",
previousEndpoints: namedPort,
currentEndpoints: namedPortRenumbered,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:22", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{{
Endpoint: "10.1.1.1:11",
ServicePortName: makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP),
}},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{},
expectedHealthchecks: map[types.NamespacedName]int{},
}, {
// Case[13]: complex add and remove
name: "complex add and remove",
previousEndpoints: complexBefore,
currentEndpoints: complexAfter,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns2", "ep2", "p22", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.22:22", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.2:22", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns2", "ep2", "p23", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.2.2.3:23", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns4", "ep4", "p44", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.4.4.4:44", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.4.4.5:44", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns4", "ep4", "p45", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.4.4.6:45", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.11:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:12", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns1", "ep1", "p122", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.2:122", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns3", "ep3", "p33", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.3.3.3:33", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
makeServicePortName("ns4", "ep4", "p44", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.4.4.4:44", IsLocal: true, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{{
Endpoint: "10.2.2.2:22",
ServicePortName: makeServicePortName("ns2", "ep2", "p22", v1.ProtocolUDP),
}, {
Endpoint: "10.2.2.22:22",
ServicePortName: makeServicePortName("ns2", "ep2", "p22", v1.ProtocolUDP),
}, {
Endpoint: "10.2.2.3:23",
ServicePortName: makeServicePortName("ns2", "ep2", "p23", v1.ProtocolUDP),
}, {
Endpoint: "10.4.4.5:44",
ServicePortName: makeServicePortName("ns4", "ep4", "p44", v1.ProtocolUDP),
}, {
Endpoint: "10.4.4.6:45",
ServicePortName: makeServicePortName("ns4", "ep4", "p45", v1.ProtocolUDP),
}},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{
makeServicePortName("ns1", "ep1", "p12", v1.ProtocolUDP): true,
makeServicePortName("ns1", "ep1", "p122", v1.ProtocolUDP): true,
makeServicePortName("ns3", "ep3", "p33", v1.ProtocolUDP): true,
},
expectedHealthchecks: map[types.NamespacedName]int{
makeNSN("ns4", "ep4"): 1,
},
}, {
// Case[14]: change from 0 endpoint address to 1 unnamed port
name: "change from 0 endpoint address to 1 unnamed port",
previousEndpoints: emptyEndpointSlices,
currentEndpoints: namedPort,
oldEndpoints: map[proxy.ServicePortName][]*endpointsInfo{},
expectedResult: map[proxy.ServicePortName][]*endpointsInfo{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): {
{BaseEndpointInfo: &proxy.BaseEndpointInfo{Endpoint: "10.1.1.1:11", IsLocal: false, Ready: true, Serving: true, Terminating: false}},
},
},
expectedStaleEndpoints: []proxy.ServiceEndpoint{},
expectedStaleServiceNames: map[proxy.ServicePortName]bool{
makeServicePortName("ns1", "ep1", "p11", v1.ProtocolUDP): true,
},
expectedHealthchecks: map[types.NamespacedName]int{},
},
}
for tci, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.hostname = nodeName
// First check that after adding all previous versions of endpoints,
// the fp.oldEndpoints is as we expect.
for i := range tc.previousEndpoints {
if tc.previousEndpoints[i] != nil {
fp.OnEndpointSliceAdd(tc.previousEndpoints[i])
}
}
fp.endpointsMap.Update(fp.endpointsChanges)
compareEndpointsMapsExceptChainName(t, tci, fp.endpointsMap, tc.oldEndpoints)
// Now let's call appropriate handlers to get to state we want to be.
if len(tc.previousEndpoints) != len(tc.currentEndpoints) {
t.Fatalf("[%d] different lengths of previous and current endpoints", tci)
}
for i := range tc.previousEndpoints {
prev, curr := tc.previousEndpoints[i], tc.currentEndpoints[i]
switch {
case prev == nil:
fp.OnEndpointSliceAdd(curr)
case curr == nil:
fp.OnEndpointSliceDelete(prev)
default:
fp.OnEndpointSliceUpdate(prev, curr)
}
}
result := fp.endpointsMap.Update(fp.endpointsChanges)
newMap := fp.endpointsMap
compareEndpointsMapsExceptChainName(t, tci, newMap, tc.expectedResult)
if len(result.StaleEndpoints) != len(tc.expectedStaleEndpoints) {
t.Errorf("[%d] expected %d staleEndpoints, got %d: %v", tci, len(tc.expectedStaleEndpoints), len(result.StaleEndpoints), result.StaleEndpoints)
}
for _, x := range tc.expectedStaleEndpoints {
found := false
for _, stale := range result.StaleEndpoints {
if stale == x {
found = true
break
}
}
if !found {
t.Errorf("[%d] expected staleEndpoints[%v], but didn't find it: %v", tci, x, result.StaleEndpoints)
}
}
if len(result.StaleServiceNames) != len(tc.expectedStaleServiceNames) {
t.Errorf("[%d] expected %d staleServiceNames, got %d: %v", tci, len(tc.expectedStaleServiceNames), len(result.StaleServiceNames), result.StaleServiceNames)
}
for svcName := range tc.expectedStaleServiceNames {
found := false
for _, stale := range result.StaleServiceNames {
if stale == svcName {
found = true
}
}
if !found {
t.Errorf("[%d] expected staleServiceNames[%v], but didn't find it: %v", tci, svcName, result.StaleServiceNames)
}
}
if !reflect.DeepEqual(result.HCEndpointsLocalIPSize, tc.expectedHealthchecks) {
t.Errorf("[%d] expected healthchecks %v, got %v", tci, tc.expectedHealthchecks, result.HCEndpointsLocalIPSize)
}
})
}
}
// The majority of EndpointSlice specific tests are not iptables specific and focus on
// the shared EndpointChangeTracker and EndpointSliceCache. This test ensures that the
// iptables proxier supports translating EndpointSlices to iptables output.
func TestEndpointSliceE2E(t *testing.T) {
expectedIPTablesWithSlice := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-3JOIVZTXZZRGORX4 - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SEP-XGJFVO3L2O5SRFNT - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 0 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -s 10.0.1.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -m tcp -p tcp -j DNAT --to-destination 10.0.1.3:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 0 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.3:80" -j KUBE-SEP-XGJFVO3L2O5SRFNT
COMMIT
`)
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.OnServiceSynced()
fp.OnEndpointSlicesSynced()
serviceName := "svc1"
namespaceName := "ns1"
fp.OnServiceAdd(&v1.Service{
ObjectMeta: metav1.ObjectMeta{Name: serviceName, Namespace: namespaceName},
Spec: v1.ServiceSpec{
ClusterIP: "172.30.1.1",
Selector: map[string]string{"foo": "bar"},
Ports: []v1.ServicePort{{Name: "", TargetPort: intstr.FromInt(80), Protocol: v1.ProtocolTCP}},
},
})
tcpProtocol := v1.ProtocolTCP
endpointSlice := &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", serviceName),
Namespace: namespaceName,
Labels: map[string]string{discovery.LabelServiceName: serviceName},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String(testHostname),
}, {
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String("node2"),
}, {
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String("node3"),
}, {
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(false)},
NodeName: pointer.String("node4"),
}},
}
fp.OnEndpointSliceAdd(endpointSlice)
fp.syncProxyRules()
assertIPTablesRulesEqual(t, getLine(), expectedIPTablesWithSlice, fp.iptablesData.String())
fp.OnEndpointSliceDelete(endpointSlice)
fp.syncProxyRules()
assertIPTablesRulesNotEqual(t, getLine(), expectedIPTablesWithSlice, fp.iptablesData.String())
}
// TestHealthCheckNodePortWhenTerminating tests that health check node ports are not enabled when all local endpoints are terminating
func TestHealthCheckNodePortWhenTerminating(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.OnServiceSynced()
fp.OnEndpointSlicesSynced()
serviceName := "svc1"
namespaceName := "ns1"
fp.OnServiceAdd(&v1.Service{
ObjectMeta: metav1.ObjectMeta{Name: serviceName, Namespace: namespaceName},
Spec: v1.ServiceSpec{
ClusterIP: "172.30.1.1",
Selector: map[string]string{"foo": "bar"},
Ports: []v1.ServicePort{{Name: "", TargetPort: intstr.FromInt(80), Protocol: v1.ProtocolTCP}},
},
})
tcpProtocol := v1.ProtocolTCP
endpointSlice := &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", serviceName),
Namespace: namespaceName,
Labels: map[string]string{discovery.LabelServiceName: serviceName},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String(testHostname),
}, {
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String(testHostname),
}, {
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String(testHostname),
}, { // not ready endpoints should be ignored
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(false)},
NodeName: pointer.String(testHostname),
}},
}
fp.OnEndpointSliceAdd(endpointSlice)
result := fp.endpointsMap.Update(fp.endpointsChanges)
if len(result.HCEndpointsLocalIPSize) != 1 {
t.Errorf("unexpected number of health check node ports, expected 1 but got: %d", len(result.HCEndpointsLocalIPSize))
}
// set all endpoints to terminating
endpointSliceTerminating := &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", serviceName),
Namespace: namespaceName,
Labels: map[string]string{discovery.LabelServiceName: serviceName},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
}, {
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
}, {
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
}, { // not ready endpoints should be ignored
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
}},
}
fp.OnEndpointSliceUpdate(endpointSlice, endpointSliceTerminating)
result = fp.endpointsMap.Update(fp.endpointsChanges)
if len(result.HCEndpointsLocalIPSize) != 0 {
t.Errorf("unexpected number of health check node ports, expected 0 but got: %d", len(result.HCEndpointsLocalIPSize))
}
}
func TestProxierDeleteNodePortStaleUDP(t *testing.T) {
fcmd := fakeexec.FakeCmd{}
fexec := fakeexec.FakeExec{
LookPathFunc: func(cmd string) (string, error) { return cmd, nil },
}
execFunc := func(cmd string, args ...string) exec.Cmd {
return fakeexec.InitFakeCmd(&fcmd, cmd, args...)
}
cmdOutput := "1 flow entries have been deleted"
cmdFunc := func() ([]byte, []byte, error) { return []byte(cmdOutput), nil, nil }
// Delete ClusterIP entries
fcmd.CombinedOutputScript = append(fcmd.CombinedOutputScript, cmdFunc)
fexec.CommandScript = append(fexec.CommandScript, execFunc)
// Delete ExternalIP entries
fcmd.CombinedOutputScript = append(fcmd.CombinedOutputScript, cmdFunc)
fexec.CommandScript = append(fexec.CommandScript, execFunc)
// Delete LoadBalancerIP entries
fcmd.CombinedOutputScript = append(fcmd.CombinedOutputScript, cmdFunc)
fexec.CommandScript = append(fexec.CommandScript, execFunc)
// Delete NodePort entries
fcmd.CombinedOutputScript = append(fcmd.CombinedOutputScript, cmdFunc)
fexec.CommandScript = append(fexec.CommandScript, execFunc)
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.exec = &fexec
svcIP := "172.30.0.41"
extIP := "192.168.99.11"
lbIngressIP := "1.2.3.4"
svcPort := 80
nodePort := 31201
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolUDP,
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.ClusterIP = svcIP
svc.Spec.ExternalIPs = []string{extIP}
svc.Spec.Type = "LoadBalancer"
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolUDP,
NodePort: int32(nodePort),
}}
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: lbIngressIP,
}}
}),
)
fp.syncProxyRules()
if fexec.CommandCalls != 0 {
t.Fatalf("Created service without endpoints must not clear conntrack entries")
}
epIP := "10.180.0.1"
udpProtocol := v1.ProtocolUDP
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &udpProtocol,
}}
}),
)
fp.syncProxyRules()
if fexec.CommandCalls != 0 {
t.Fatalf("Updated UDP service with not ready endpoints must not clear UDP entries")
}
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{epIP},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &udpProtocol,
}}
}),
)
fp.syncProxyRules()
if fexec.CommandCalls != 4 {
t.Fatalf("Updated UDP service with new endpoints must clear UDP entries 4 times: ClusterIP, NodePort, ExternalIP and LB")
}
// the order is not guaranteed so we have to compare the strings in any order
expectedCommands := []string{
// Delete ClusterIP Conntrack entries
fmt.Sprintf("conntrack -D --orig-dst %s -p %s", svcIP, strings.ToLower(string((v1.ProtocolUDP)))),
// Delete ExternalIP Conntrack entries
fmt.Sprintf("conntrack -D --orig-dst %s -p %s", extIP, strings.ToLower(string((v1.ProtocolUDP)))),
// Delete LoadBalancerIP Conntrack entries
fmt.Sprintf("conntrack -D --orig-dst %s -p %s", lbIngressIP, strings.ToLower(string((v1.ProtocolUDP)))),
// Delete NodePort Conntrack entrie
fmt.Sprintf("conntrack -D -p %s --dport %d", strings.ToLower(string((v1.ProtocolUDP))), nodePort),
}
actualCommands := []string{
strings.Join(fcmd.CombinedOutputLog[0], " "),
strings.Join(fcmd.CombinedOutputLog[1], " "),
strings.Join(fcmd.CombinedOutputLog[2], " "),
strings.Join(fcmd.CombinedOutputLog[3], " "),
}
sort.Strings(expectedCommands)
sort.Strings(actualCommands)
if !reflect.DeepEqual(expectedCommands, actualCommands) {
t.Errorf("Expected commands: %v, but executed %v", expectedCommands, actualCommands)
}
}
func TestProxierMetricsIptablesTotalRules(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
tcpProtocol := v1.ProtocolTCP
metrics.RegisterMetrics()
svcIP := "172.30.0.41"
svcPort := 80
nodePort := 31201
svcPortName := proxy.ServicePortName{
NamespacedName: makeNSN("ns1", "svc1"),
Port: "p80",
Protocol: v1.ProtocolTCP,
}
makeServiceMap(fp,
makeTestService(svcPortName.Namespace, svcPortName.Name, func(svc *v1.Service) {
svc.Spec.ClusterIP = svcIP
svc.Spec.Ports = []v1.ServicePort{{
Name: svcPortName.Port,
Port: int32(svcPort),
Protocol: v1.ProtocolTCP,
NodePort: int32(nodePort),
}}
}),
)
fp.syncProxyRules()
iptablesData := fp.iptablesData.String()
nFilterRulesMetric, err := testutil.GetGaugeMetricValue(metrics.IptablesRulesTotal.WithLabelValues(string(utiliptables.TableFilter)))
if err != nil {
t.Errorf("failed to get %s value, err: %v", metrics.IptablesRulesTotal.Name, err)
}
nFilterRules := int(nFilterRulesMetric)
expectedFilterRules := countRules(utiliptables.TableFilter, iptablesData)
if nFilterRules != expectedFilterRules {
t.Fatalf("Wrong number of filter rule: expected %d got %d\n%s", expectedFilterRules, nFilterRules, iptablesData)
}
nNatRulesMetric, err := testutil.GetGaugeMetricValue(metrics.IptablesRulesTotal.WithLabelValues(string(utiliptables.TableNAT)))
if err != nil {
t.Errorf("failed to get %s value, err: %v", metrics.IptablesRulesTotal.Name, err)
}
nNatRules := int(nNatRulesMetric)
expectedNatRules := countRules(utiliptables.TableNAT, iptablesData)
if nNatRules != expectedNatRules {
t.Fatalf("Wrong number of nat rules: expected %d got %d\n%s", expectedNatRules, nNatRules, iptablesData)
}
populateEndpointSlices(fp,
makeTestEndpointSlice(svcPortName.Namespace, svcPortName.Name, 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.0.0.2"},
}, {
Addresses: []string{"10.0.0.5"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String(svcPortName.Port),
Port: pointer.Int32(int32(svcPort)),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
iptablesData = fp.iptablesData.String()
nFilterRulesMetric, err = testutil.GetGaugeMetricValue(metrics.IptablesRulesTotal.WithLabelValues(string(utiliptables.TableFilter)))
if err != nil {
t.Errorf("failed to get %s value, err: %v", metrics.IptablesRulesTotal.Name, err)
}
nFilterRules = int(nFilterRulesMetric)
expectedFilterRules = countRules(utiliptables.TableFilter, iptablesData)
if nFilterRules != expectedFilterRules {
t.Fatalf("Wrong number of filter rule: expected %d got %d\n%s", expectedFilterRules, nFilterRules, iptablesData)
}
nNatRulesMetric, err = testutil.GetGaugeMetricValue(metrics.IptablesRulesTotal.WithLabelValues(string(utiliptables.TableNAT)))
if err != nil {
t.Errorf("failed to get %s value, err: %v", metrics.IptablesRulesTotal.Name, err)
}
nNatRules = int(nNatRulesMetric)
expectedNatRules = countRules(utiliptables.TableNAT, iptablesData)
if nNatRules != expectedNatRules {
t.Fatalf("Wrong number of nat rules: expected %d got %d\n%s", expectedNatRules, nNatRules, iptablesData)
}
}
// TODO(thockin): add *more* tests for syncProxyRules() or break it down further and test the pieces.
// This test ensures that the iptables proxier supports translating Endpoints to
// iptables output when internalTrafficPolicy is specified
func TestInternalTrafficPolicyE2E(t *testing.T) {
type endpoint struct {
ip string
hostname string
}
cluster := v1.ServiceInternalTrafficPolicyCluster
local := v1.ServiceInternalTrafficPolicyLocal
clusterExpectedIPTables := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-3JOIVZTXZZRGORX4 - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SEP-XGJFVO3L2O5SRFNT - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -s 10.0.1.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -m tcp -p tcp -j DNAT --to-destination 10.0.1.3:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.3:80" -j KUBE-SEP-XGJFVO3L2O5SRFNT
COMMIT
`)
testCases := []struct {
name string
line int
internalTrafficPolicy *v1.ServiceInternalTrafficPolicyType
featureGateOn bool
endpoints []endpoint
expectEndpointRule bool
expectedIPTablesWithSlice string
flowTests []packetFlowTest
}{
{
name: "internalTrafficPolicy is cluster",
line: getLine(),
internalTrafficPolicy: &cluster,
featureGateOn: true,
endpoints: []endpoint{
{"10.0.1.1", testHostname},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
expectEndpointRule: true,
expectedIPTablesWithSlice: clusterExpectedIPTables,
flowTests: []packetFlowTest{
{
name: "pod to ClusterIP hits all endpoints",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.3:80",
masq: false,
},
},
},
{
name: "internalTrafficPolicy is local and there are local endpoints",
line: getLine(),
internalTrafficPolicy: &local,
featureGateOn: true,
endpoints: []endpoint{
{"10.0.1.1", testHostname},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
expectEndpointRule: true,
expectedIPTablesWithSlice: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-3JOIVZTXZZRGORX4 - [0:0]
:KUBE-SVL-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVL-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -j KUBE-SEP-3JOIVZTXZZRGORX4
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to ClusterIP hits only local endpoint",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.1:80",
masq: false,
},
},
},
{
name: "internalTrafficPolicy is local and there are no local endpoints",
line: getLine(),
internalTrafficPolicy: &local,
featureGateOn: true,
endpoints: []endpoint{
{"10.0.1.1", "host0"},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
expectEndpointRule: false,
expectedIPTablesWithSlice: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 has no local endpoints" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "no endpoints",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "DROP",
},
},
},
{
name: "Local internalTrafficPolicy is ignored when feature gate is off",
line: getLine(),
internalTrafficPolicy: &local,
featureGateOn: false,
endpoints: []endpoint{
{"10.0.1.1", testHostname},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
expectEndpointRule: false,
expectedIPTablesWithSlice: clusterExpectedIPTables,
flowTests: []packetFlowTest{
{
name: "pod to ClusterIP hits all endpoints",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.3:80",
masq: false,
},
},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceInternalTrafficPolicy, tc.featureGateOn)()
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.OnServiceSynced()
fp.OnEndpointSlicesSynced()
serviceName := "svc1"
namespaceName := "ns1"
svc := &v1.Service{
ObjectMeta: metav1.ObjectMeta{Name: serviceName, Namespace: namespaceName},
Spec: v1.ServiceSpec{
ClusterIP: "172.30.1.1",
Selector: map[string]string{"foo": "bar"},
Ports: []v1.ServicePort{{Name: "", Port: 80, Protocol: v1.ProtocolTCP}},
},
}
if tc.internalTrafficPolicy != nil {
svc.Spec.InternalTrafficPolicy = tc.internalTrafficPolicy
}
fp.OnServiceAdd(svc)
tcpProtocol := v1.ProtocolTCP
endpointSlice := &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", serviceName),
Namespace: namespaceName,
Labels: map[string]string{discovery.LabelServiceName: serviceName},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
}
for _, ep := range tc.endpoints {
endpointSlice.Endpoints = append(endpointSlice.Endpoints, discovery.Endpoint{
Addresses: []string{ep.ip},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String(ep.hostname),
})
}
fp.OnEndpointSliceAdd(endpointSlice)
fp.syncProxyRules()
assertIPTablesRulesEqual(t, tc.line, tc.expectedIPTablesWithSlice, fp.iptablesData.String())
runPacketFlowTests(t, tc.line, ipt, testNodeIP, tc.flowTests)
fp.OnEndpointSliceDelete(endpointSlice)
fp.syncProxyRules()
if tc.expectEndpointRule {
fp.OnEndpointSliceDelete(endpointSlice)
fp.syncProxyRules()
assertIPTablesRulesNotEqual(t, tc.line, tc.expectedIPTablesWithSlice, fp.iptablesData.String())
}
runPacketFlowTests(t, tc.line, ipt, testNodeIP, []packetFlowTest{
{
name: "endpoints deleted",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "REJECT",
},
})
})
}
}
// TestEndpointSliceWithTerminatingEndpointsTrafficPolicyLocal tests that when there are local ready and ready + terminating
// endpoints, only the ready endpoints are used.
func TestEndpointSliceWithTerminatingEndpointsTrafficPolicyLocal(t *testing.T) {
tcpProtocol := v1.ProtocolTCP
timeout := v1.DefaultClientIPServiceAffinitySeconds
service := &v1.Service{
ObjectMeta: metav1.ObjectMeta{Name: "svc1", Namespace: "ns1"},
Spec: v1.ServiceSpec{
ClusterIP: "172.30.1.1",
Type: v1.ServiceTypeLoadBalancer,
ExternalTrafficPolicy: v1.ServiceExternalTrafficPolicyTypeLocal,
Selector: map[string]string{"foo": "bar"},
Ports: []v1.ServicePort{
{
Name: "",
TargetPort: intstr.FromInt(80),
Port: 80,
Protocol: v1.ProtocolTCP,
},
},
HealthCheckNodePort: 30000,
SessionAffinity: v1.ServiceAffinityClientIP,
SessionAffinityConfig: &v1.SessionAffinityConfig{
ClientIP: &v1.ClientIPConfig{
TimeoutSeconds: &timeout,
},
},
},
Status: v1.ServiceStatus{
LoadBalancer: v1.LoadBalancerStatus{
Ingress: []v1.LoadBalancerIngress{
{IP: "1.2.3.4"},
},
},
},
}
testcases := []struct {
name string
line int
terminatingFeatureGate bool
endpointslice *discovery.EndpointSlice
expectedIPTables string
noUsableEndpoints bool
flowTests []packetFlowTest
}{
{
name: "feature gate ProxyTerminatingEndpoints enabled, ready endpoints exist",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored for external since there are ready non-terminating endpoints
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored for external since there are ready non-terminating endpoints
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored for external since it's not local
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String("host-1"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-3JOIVZTXZZRGORX4 - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-SVL-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "pod traffic for ns1/svc1 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "route LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -j KUBE-SVL-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --rcheck --seconds 10800 --reap -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --rcheck --seconds 10800 --reap -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -j KUBE-SEP-IO5XOSKPAXIFQXAJ
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80",
masq: false,
},
},
},
{
name: "feature gate ProxyTerminatingEndpoints disabled, ready endpoints exist",
line: getLine(),
terminatingFeatureGate: false,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored since it is not ready and the feature gate is off
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored since it is not ready and the feature gate is off
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored for external since it's not local
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String("host-1"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-3JOIVZTXZZRGORX4 - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-SVL-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "pod traffic for ns1/svc1 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "route LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -j KUBE-SVL-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --rcheck --seconds 10800 --reap -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --rcheck --seconds 10800 --reap -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -j KUBE-SEP-IO5XOSKPAXIFQXAJ
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80",
masq: false,
},
},
},
{
name: "feature gate ProxyTerminatingEndpoints enabled, only terminating endpoints exist",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
// this endpoint should be used since there are only ready terminating endpoints
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be used since there are only ready terminating endpoints
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should not be used since it is both terminating and not ready.
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored for external since it's not local
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String("host-1"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SEP-XGJFVO3L2O5SRFNT - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-SVL-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "pod traffic for ns1/svc1 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "route LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -j KUBE-SVL-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -s 10.0.1.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-XGJFVO3L2O5SRFNT --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.3:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.3:80" -m recent --name KUBE-SEP-XGJFVO3L2O5SRFNT --rcheck --seconds 10800 --reap -j KUBE-SEP-XGJFVO3L2O5SRFNT
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVL-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.3:80" -j KUBE-SEP-XGJFVO3L2O5SRFNT
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.0.1.2:80, 10.0.1.3:80",
masq: false,
},
},
},
{
name: "with ProxyTerminatingEndpoints disabled, only non-local and terminating endpoints exist",
line: getLine(),
terminatingFeatureGate: false,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String("host-1"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1 has no local endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "pod traffic for ns1/svc1 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "route LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "DROP",
},
},
},
{
name: "ProxyTerminatingEndpoints enabled, terminating endpoints on remote node",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
// this endpoint won't be used because it's not local,
// but it will prevent a REJECT rule from being created
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("host-1"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1 has no local endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "pod traffic for ns1/svc1 external destinations" -s 10.0.0.0/8 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "route LOCAL traffic for ns1/svc1 external destinations" -m addrtype --src-type LOCAL -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.5:80",
},
{
name: "external to LB, no locally-usable endpoints",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "DROP",
},
},
},
{
name: "no usable endpoints on any node",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
// Local but not ready or serving
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// Remote and not ready or serving
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("host-1"),
},
},
},
noUsableEndpoints: true,
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-NODEPORTS -m comment --comment "ns1/svc1 health check node port" -m tcp -p tcp --dport 30000 -j ACCEPT
-A KUBE-SERVICES -m comment --comment "ns1/svc1 has no endpoints" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1 has no endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP, no usable endpoints",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "REJECT",
},
{
name: "external to LB, no usable endpoints",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "REJECT",
},
},
},
}
for _, testcase := range testcases {
t.Run(testcase.name, func(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ProxyTerminatingEndpoints, testcase.terminatingFeatureGate)()
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.OnServiceSynced()
fp.OnEndpointSlicesSynced()
fp.OnServiceAdd(service)
fp.OnEndpointSliceAdd(testcase.endpointslice)
fp.syncProxyRules()
assertIPTablesRulesEqual(t, testcase.line, testcase.expectedIPTables, fp.iptablesData.String())
runPacketFlowTests(t, testcase.line, ipt, testNodeIP, testcase.flowTests)
fp.OnEndpointSliceDelete(testcase.endpointslice)
fp.syncProxyRules()
if testcase.noUsableEndpoints {
// Deleting the EndpointSlice should have had no effect
assertIPTablesRulesEqual(t, testcase.line, testcase.expectedIPTables, fp.iptablesData.String())
} else {
assertIPTablesRulesNotEqual(t, testcase.line, testcase.expectedIPTables, fp.iptablesData.String())
}
runPacketFlowTests(t, testcase.line, ipt, testNodeIP, []packetFlowTest{
{
name: "pod to clusterIP after endpoints deleted",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "REJECT",
},
{
name: "external to LB after endpoints deleted",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "REJECT",
},
})
})
}
}
// TestEndpointSliceWithTerminatingEndpointsTrafficPolicyCluster tests that when there are cluster-wide ready and ready + terminating
// endpoints, only the ready endpoints are used.
func TestEndpointSliceWithTerminatingEndpointsTrafficPolicyCluster(t *testing.T) {
tcpProtocol := v1.ProtocolTCP
timeout := v1.DefaultClientIPServiceAffinitySeconds
service := &v1.Service{
ObjectMeta: metav1.ObjectMeta{Name: "svc1", Namespace: "ns1"},
Spec: v1.ServiceSpec{
ClusterIP: "172.30.1.1",
Type: v1.ServiceTypeLoadBalancer,
ExternalTrafficPolicy: v1.ServiceExternalTrafficPolicyTypeCluster,
Selector: map[string]string{"foo": "bar"},
Ports: []v1.ServicePort{
{
Name: "",
TargetPort: intstr.FromInt(80),
Port: 80,
Protocol: v1.ProtocolTCP,
},
},
HealthCheckNodePort: 30000,
SessionAffinity: v1.ServiceAffinityClientIP,
SessionAffinityConfig: &v1.SessionAffinityConfig{
ClientIP: &v1.ClientIPConfig{
TimeoutSeconds: &timeout,
},
},
},
Status: v1.ServiceStatus{
LoadBalancer: v1.LoadBalancerStatus{
Ingress: []v1.LoadBalancerIngress{
{IP: "1.2.3.4"},
},
},
},
}
testcases := []struct {
name string
line int
terminatingFeatureGate bool
endpointslice *discovery.EndpointSlice
expectedIPTables string
noUsableEndpoints bool
flowTests []packetFlowTest
}{
{
name: "feature gate ProxyTerminatingEndpoints enabled, ready endpoints exist",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be ignored since there are ready non-terminating endpoints
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
{
// this endpoint should be ignored since it is not "serving"
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
{
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String("another-host"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-3JOIVZTXZZRGORX4 - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade traffic for ns1/svc1 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --rcheck --seconds 10800 --reap -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.5:80",
masq: true,
},
},
},
{
name: "feature gate ProxyTerminatingEndpoints disabled, ready endpoints exist",
line: getLine(),
terminatingFeatureGate: false,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String(testHostname),
},
{
// always ignored since feature gate is disabled
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
{
// always ignored since serving=false
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
{
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(true),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(false),
},
NodeName: pointer.String("another-host"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-3JOIVZTXZZRGORX4 - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade traffic for ns1/svc1 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-3JOIVZTXZZRGORX4 -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m recent --name KUBE-SEP-3JOIVZTXZZRGORX4 --rcheck --seconds 10800 --reap -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.1:80" -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-3JOIVZTXZZRGORX4
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.0.1.1:80, 10.0.1.2:80, 10.0.1.5:80",
masq: true,
},
},
},
{
name: "feature gate ProxyTerminatingEndpoints enabled, only terminating endpoints exist",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
// this endpoint should be used since there are only ready terminating endpoints
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should be used since there are only ready terminating endpoints
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// this endpoint should not be used since it is both terminating and not ready.
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
{
// this endpoint should be used since there are only ready terminating endpoints
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SEP-IO5XOSKPAXIFQXAJ - [0:0]
:KUBE-SEP-XGJFVO3L2O5SRFNT - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade traffic for ns1/svc1 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -s 10.0.1.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-IO5XOSKPAXIFQXAJ -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.2:80
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -s 10.0.1.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-XGJFVO3L2O5SRFNT -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-XGJFVO3L2O5SRFNT --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.3:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m recent --name KUBE-SEP-IO5XOSKPAXIFQXAJ --rcheck --seconds 10800 --reap -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.3:80" -m recent --name KUBE-SEP-XGJFVO3L2O5SRFNT --rcheck --seconds 10800 --reap -j KUBE-SEP-XGJFVO3L2O5SRFNT
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.2:80" -m statistic --mode random --probability 0.3333333333 -j KUBE-SEP-IO5XOSKPAXIFQXAJ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.3:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-XGJFVO3L2O5SRFNT
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.2:80, 10.0.1.3:80, 10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.0.1.2:80, 10.0.1.3:80, 10.0.1.5:80",
masq: true,
},
},
},
{
name: "with ProxyTerminatingEndpoints disabled, only terminating endpoints exist",
line: getLine(),
terminatingFeatureGate: false,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
Addresses: []string{"10.0.1.1"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.2"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.0.1.3"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
{
Addresses: []string{"10.0.1.4"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
{
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("another-host"),
},
},
},
noUsableEndpoints: true,
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 has no endpoints" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1 has no endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "REJECT",
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "REJECT",
},
},
},
{
name: "ProxyTerminatingEndpoints enabled, terminating endpoints on remote node",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(true),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("host-1"),
},
},
},
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXT-AQI2S6QIMU7PVVRP - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-EQCHZ7S2PJ72OHAY - [0:0]
:KUBE-SVC-AQI2S6QIMU7PVVRP - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "ns1/svc1 loadbalancer IP" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j KUBE-EXT-AQI2S6QIMU7PVVRP
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-EXT-AQI2S6QIMU7PVVRP -m comment --comment "masquerade traffic for ns1/svc1 external destinations" -j KUBE-MARK-MASQ
-A KUBE-EXT-AQI2S6QIMU7PVVRP -j KUBE-SVC-AQI2S6QIMU7PVVRP
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -s 10.0.1.5 -j KUBE-MARK-MASQ
-A KUBE-SEP-EQCHZ7S2PJ72OHAY -m comment --comment ns1/svc1 -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --set -m tcp -p tcp -j DNAT --to-destination 10.0.1.5:80
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 cluster IP" -m tcp -p tcp -d 172.30.1.1 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -m recent --name KUBE-SEP-EQCHZ7S2PJ72OHAY --rcheck --seconds 10800 --reap -j KUBE-SEP-EQCHZ7S2PJ72OHAY
-A KUBE-SVC-AQI2S6QIMU7PVVRP -m comment --comment "ns1/svc1 -> 10.0.1.5:80" -j KUBE-SEP-EQCHZ7S2PJ72OHAY
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "10.0.1.5:80",
masq: false,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.0.1.5:80",
masq: true,
},
},
},
{
name: "no usable endpoints on any node",
line: getLine(),
terminatingFeatureGate: true,
endpointslice: &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", "svc1"),
Namespace: "ns1",
Labels: map[string]string{discovery.LabelServiceName: "svc1"},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
Endpoints: []discovery.Endpoint{
{
// Local, not ready or serving
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String(testHostname),
},
{
// Remote, not ready or serving
Addresses: []string{"10.0.1.5"},
Conditions: discovery.EndpointConditions{
Ready: pointer.Bool(false),
Serving: pointer.Bool(false),
Terminating: pointer.Bool(true),
},
NodeName: pointer.String("host-1"),
},
},
},
noUsableEndpoints: true,
expectedIPTables: dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1 has no endpoints" -m tcp -p tcp -d 172.30.1.1 --dport 80 -j REJECT
-A KUBE-EXTERNAL-SERVICES -m comment --comment "ns1/svc1 has no endpoints" -m tcp -p tcp -d 1.2.3.4 --dport 80 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
COMMIT
`),
flowTests: []packetFlowTest{
{
name: "pod to clusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "REJECT",
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "REJECT",
},
},
},
}
for _, testcase := range testcases {
t.Run(testcase.name, func(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ProxyTerminatingEndpoints, testcase.terminatingFeatureGate)()
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.OnServiceSynced()
fp.OnEndpointSlicesSynced()
fp.OnServiceAdd(service)
fp.OnEndpointSliceAdd(testcase.endpointslice)
fp.syncProxyRules()
assertIPTablesRulesEqual(t, testcase.line, testcase.expectedIPTables, fp.iptablesData.String())
runPacketFlowTests(t, testcase.line, ipt, testNodeIP, testcase.flowTests)
fp.OnEndpointSliceDelete(testcase.endpointslice)
fp.syncProxyRules()
if testcase.noUsableEndpoints {
// Deleting the EndpointSlice should have had no effect
assertIPTablesRulesEqual(t, testcase.line, testcase.expectedIPTables, fp.iptablesData.String())
} else {
assertIPTablesRulesNotEqual(t, testcase.line, testcase.expectedIPTables, fp.iptablesData.String())
}
runPacketFlowTests(t, testcase.line, ipt, testNodeIP, []packetFlowTest{
{
name: "pod to clusterIP after endpoints deleted",
sourceIP: "10.0.0.2",
destIP: "172.30.1.1",
destPort: 80,
output: "REJECT",
},
{
name: "external to LB after endpoints deleted",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "REJECT",
},
})
})
}
}
func TestInternalExternalMasquerade(t *testing.T) {
// (Put the test setup code in an internal function so we can have it here at the
// top, before the test cases that will be run against it.)
setupTest := func(fp *Proxier) {
local := v1.ServiceInternalTrafficPolicyLocal
tcpProtocol := v1.ProtocolTCP
makeServiceMap(fp,
makeTestService("ns1", "svc1", func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ClusterIP = "172.30.0.41"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
NodePort: int32(3001),
}}
svc.Spec.HealthCheckNodePort = 30001
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: "1.2.3.4",
}}
}),
makeTestService("ns2", "svc2", func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ClusterIP = "172.30.0.42"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
NodePort: int32(3002),
}}
svc.Spec.HealthCheckNodePort = 30002
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: "5.6.7.8",
}}
}),
makeTestService("ns3", "svc3", func(svc *v1.Service) {
svc.Spec.Type = "LoadBalancer"
svc.Spec.ClusterIP = "172.30.0.43"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
NodePort: int32(3003),
}}
svc.Spec.HealthCheckNodePort = 30003
svc.Spec.InternalTrafficPolicy = &local
svc.Status.LoadBalancer.Ingress = []v1.LoadBalancerIngress{{
IP: "9.10.11.12",
}}
}),
)
populateEndpointSlices(fp,
makeTestEndpointSlice("ns1", "svc1", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{
{
Addresses: []string{"10.180.0.1"},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.180.1.1"},
NodeName: pointer.String("remote"),
},
}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
makeTestEndpointSlice("ns2", "svc2", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{
{
Addresses: []string{"10.180.0.2"},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.180.1.2"},
NodeName: pointer.String("remote"),
},
}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
makeTestEndpointSlice("ns3", "svc3", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{
{
Addresses: []string{"10.180.0.3"},
NodeName: pointer.String(testHostname),
},
{
Addresses: []string{"10.180.1.3"},
NodeName: pointer.String("remote"),
},
}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
}
// We use the same flowTests for all of the testCases. The "output" and "masq"
// values here represent the normal case (working localDetector, no masqueradeAll)
flowTests := []packetFlowTest{
{
name: "pod to ClusterIP",
sourceIP: "10.0.0.2",
destIP: "172.30.0.41",
destPort: 80,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: false,
},
{
name: "pod to NodePort",
sourceIP: "10.0.0.2",
destIP: testNodeIP,
destPort: 3001,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "pod to LB",
sourceIP: "10.0.0.2",
destIP: "1.2.3.4",
destPort: 80,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "node to ClusterIP",
sourceIP: testNodeIP,
destIP: "172.30.0.41",
destPort: 80,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "node to NodePort",
sourceIP: testNodeIP,
destIP: testNodeIP,
destPort: 3001,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "localhost to NodePort",
sourceIP: "127.0.0.1",
destIP: "127.0.0.1",
destPort: 3001,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "node to LB",
sourceIP: testNodeIP,
destIP: "1.2.3.4",
destPort: 80,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "external to ClusterIP",
sourceIP: testExternalClient,
destIP: "172.30.0.41",
destPort: 80,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "external to NodePort",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: 3001,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "external to LB",
sourceIP: testExternalClient,
destIP: "1.2.3.4",
destPort: 80,
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "pod to ClusterIP with eTP:Local",
sourceIP: "10.0.0.2",
destIP: "172.30.0.42",
destPort: 80,
// externalTrafficPolicy does not apply to ClusterIP traffic, so same
// as "Pod to ClusterIP"
output: "10.180.0.2:80, 10.180.1.2:80",
masq: false,
},
{
name: "pod to NodePort with eTP:Local",
sourceIP: "10.0.0.2",
destIP: testNodeIP,
destPort: 3002,
// FIXME: The short-circuit rule means we potentially send to a remote
// endpoint without masquerading, which is inconsistent with the
// eTP:Cluster case. We should either be masquerading here, or NOT
// masquerading in the "pod to NodePort" case above.
output: "10.180.0.2:80, 10.180.1.2:80",
masq: false,
},
{
name: "pod to LB with eTP:Local",
sourceIP: "10.0.0.2",
destIP: "5.6.7.8",
destPort: 80,
// FIXME: The short-circuit rule means we potentially send to a remote
// endpoint without masquerading, which is inconsistent with the
// eTP:Cluster case. We should either be masquerading here, or NOT
// masquerading in the "pod to LB" case above.
output: "10.180.0.2:80, 10.180.1.2:80",
masq: false,
},
{
name: "node to ClusterIP with eTP:Local",
sourceIP: testNodeIP,
destIP: "172.30.0.42",
destPort: 80,
// externalTrafficPolicy does not apply to ClusterIP traffic, so same
// as "node to ClusterIP"
output: "10.180.0.2:80, 10.180.1.2:80",
masq: true,
},
{
name: "node to NodePort with eTP:Local",
sourceIP: testNodeIP,
destIP: testNodeIP,
destPort: 3001,
// The traffic gets short-circuited, ignoring externalTrafficPolicy, so
// same as "node to NodePort" above.
output: "10.180.0.1:80, 10.180.1.1:80",
masq: true,
},
{
name: "localhost to NodePort with eTP:Local",
sourceIP: "127.0.0.1",
destIP: "127.0.0.1",
destPort: 3002,
// The traffic gets short-circuited, ignoring externalTrafficPolicy, so
// same as "localhost to NodePort" above.
output: "10.180.0.2:80, 10.180.1.2:80",
masq: true,
},
{
name: "node to LB with eTP:Local",
sourceIP: testNodeIP,
destIP: "5.6.7.8",
destPort: 80,
// The traffic gets short-circuited, ignoring externalTrafficPolicy, so
// same as "node to LB" above.
output: "10.180.0.2:80, 10.180.1.2:80",
masq: true,
},
{
name: "external to ClusterIP with eTP:Local",
sourceIP: testExternalClient,
destIP: "172.30.0.42",
destPort: 80,
// externalTrafficPolicy does not apply to ClusterIP traffic, so same
// as "external to ClusterIP" above.
output: "10.180.0.2:80, 10.180.1.2:80",
masq: true,
},
{
name: "external to NodePort with eTP:Local",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: 3002,
// externalTrafficPolicy applies; only the local endpoint is
// selected, and we don't masquerade.
output: "10.180.0.2:80",
masq: false,
},
{
name: "external to LB with eTP:Local",
sourceIP: testExternalClient,
destIP: "5.6.7.8",
destPort: 80,
// externalTrafficPolicy applies; only the local endpoint is
// selected, and we don't masquerade.
output: "10.180.0.2:80",
masq: false,
},
{
name: "pod to ClusterIP with iTP:Local",
sourceIP: "10.0.0.2",
destIP: "172.30.0.43",
destPort: 80,
// internalTrafficPolicy applies; only the local endpoint is
// selected.
output: "10.180.0.3:80",
masq: false,
},
{
name: "pod to NodePort with iTP:Local",
sourceIP: "10.0.0.2",
destIP: testNodeIP,
destPort: 3003,
// internalTrafficPolicy does not apply to NodePort traffic, so same as
// "pod to NodePort" above.
output: "10.180.0.3:80, 10.180.1.3:80",
masq: true,
},
{
name: "pod to LB with iTP:Local",
sourceIP: "10.0.0.2",
destIP: "9.10.11.12",
destPort: 80,
// internalTrafficPolicy does not apply to LoadBalancer traffic, so
// same as "pod to LB" above.
output: "10.180.0.3:80, 10.180.1.3:80",
masq: true,
},
{
name: "node to ClusterIP with iTP:Local",
sourceIP: testNodeIP,
destIP: "172.30.0.43",
destPort: 80,
// internalTrafficPolicy applies; only the local endpoint is selected.
// Traffic is masqueraded as in the "node to ClusterIP" case because
// internalTrafficPolicy does not affect masquerading.
output: "10.180.0.3:80",
masq: true,
},
{
name: "node to NodePort with iTP:Local",
sourceIP: testNodeIP,
destIP: testNodeIP,
destPort: 3003,
// internalTrafficPolicy does not apply to NodePort traffic, so same as
// "node to NodePort" above.
output: "10.180.0.3:80, 10.180.1.3:80",
masq: true,
},
{
name: "localhost to NodePort with iTP:Local",
sourceIP: "127.0.0.1",
destIP: "127.0.0.1",
destPort: 3003,
// internalTrafficPolicy does not apply to NodePort traffic, so same as
// "localhost to NodePort" above.
output: "10.180.0.3:80, 10.180.1.3:80",
masq: true,
},
{
name: "node to LB with iTP:Local",
sourceIP: testNodeIP,
destIP: "9.10.11.12",
destPort: 80,
// internalTrafficPolicy does not apply to LoadBalancer traffic, so
// same as "node to LB" above.
output: "10.180.0.3:80, 10.180.1.3:80",
masq: true,
},
{
name: "external to ClusterIP with iTP:Local",
sourceIP: testExternalClient,
destIP: "172.30.0.43",
destPort: 80,
// internalTrafficPolicy applies; only the local endpoint is selected.
// Traffic is masqueraded as in the "external to ClusterIP" case
// because internalTrafficPolicy does not affect masquerading.
output: "10.180.0.3:80",
masq: true,
},
{
name: "external to NodePort with iTP:Local",
sourceIP: testExternalClient,
destIP: testNodeIP,
destPort: 3003,
// internalTrafficPolicy does not apply to NodePort traffic, so same as
// "external to NodePort" above.
output: "10.180.0.3:80, 10.180.1.3:80",
masq: true,
},
{
name: "external to LB with iTP:Local",
sourceIP: testExternalClient,
destIP: "9.10.11.12",
destPort: 80,
// internalTrafficPolicy does not apply to LoadBalancer traffic, so
// same as "external to LB" above.
output: "10.180.0.3:80, 10.180.1.3:80",
masq: true,
},
}
type packetFlowTestOverride struct {
output *string
masq *bool
}
testCases := []struct {
name string
line int
masqueradeAll bool
localDetector bool
overrides map[string]packetFlowTestOverride
}{
{
name: "base",
line: getLine(),
masqueradeAll: false,
localDetector: true,
overrides: nil,
},
{
name: "no LocalTrafficDetector",
line: getLine(),
masqueradeAll: false,
localDetector: false,
overrides: map[string]packetFlowTestOverride{
// With no LocalTrafficDetector, all traffic to a
// ClusterIP is assumed to be from a pod, and thus to not
// require masquerading.
"node to ClusterIP": {
masq: pointer.Bool(false),
},
"node to ClusterIP with eTP:Local": {
masq: pointer.Bool(false),
},
"node to ClusterIP with iTP:Local": {
masq: pointer.Bool(false),
},
"external to ClusterIP": {
masq: pointer.Bool(false),
},
"external to ClusterIP with eTP:Local": {
masq: pointer.Bool(false),
},
"external to ClusterIP with iTP:Local": {
masq: pointer.Bool(false),
},
// And there's no eTP:Local short-circuit for pod traffic,
// so pods get only the local endpoints.
"pod to NodePort with eTP:Local": {
output: pointer.String("10.180.0.2:80"),
},
"pod to LB with eTP:Local": {
output: pointer.String("10.180.0.2:80"),
},
},
},
{
name: "masqueradeAll",
line: getLine(),
masqueradeAll: true,
localDetector: true,
overrides: map[string]packetFlowTestOverride{
// All "to ClusterIP" traffic gets masqueraded when using
// --masquerade-all.
"pod to ClusterIP": {
masq: pointer.Bool(true),
},
"pod to ClusterIP with eTP:Local": {
masq: pointer.Bool(true),
},
"pod to ClusterIP with iTP:Local": {
masq: pointer.Bool(true),
},
},
},
{
name: "masqueradeAll, no LocalTrafficDetector",
line: getLine(),
masqueradeAll: true,
localDetector: false,
overrides: map[string]packetFlowTestOverride{
// As in "masqueradeAll"
"pod to ClusterIP": {
masq: pointer.Bool(true),
},
"pod to ClusterIP with eTP:Local": {
masq: pointer.Bool(true),
},
"pod to ClusterIP with iTP:Local": {
masq: pointer.Bool(true),
},
// As in "no LocalTrafficDetector"
"pod to NodePort with eTP:Local": {
output: pointer.String("10.180.0.2:80"),
},
"pod to LB with eTP:Local": {
output: pointer.String("10.180.0.2:80"),
},
},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceInternalTrafficPolicy, true)()
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.masqueradeAll = tc.masqueradeAll
if !tc.localDetector {
fp.localDetector = proxyutiliptables.NewNoOpLocalDetector()
}
setupTest(fp)
// Merge base flowTests with per-test-case overrides
tcFlowTests := make([]packetFlowTest, len(flowTests))
overridesApplied := 0
for i := range flowTests {
tcFlowTests[i] = flowTests[i]
if overrides, set := tc.overrides[flowTests[i].name]; set {
overridesApplied++
if overrides.masq != nil {
if tcFlowTests[i].masq == *overrides.masq {
t.Errorf("%q override value for masq is same as base value", flowTests[i].name)
}
tcFlowTests[i].masq = *overrides.masq
}
if overrides.output != nil {
if tcFlowTests[i].output == *overrides.output {
t.Errorf("%q override value for output is same as base value", flowTests[i].name)
}
tcFlowTests[i].output = *overrides.output
}
}
}
if overridesApplied != len(tc.overrides) {
t.Errorf("%d overrides did not match any test case name!", len(tc.overrides)-overridesApplied)
}
runPacketFlowTests(t, tc.line, ipt, testNodeIP, tcFlowTests)
})
}
}
func countEndpointsAndComments(iptablesData string, matchEndpoint string) (string, int, int) {
var numEndpoints, numComments int
var matched string
for _, line := range strings.Split(iptablesData, "\n") {
if strings.HasPrefix(line, "-A KUBE-SEP-") && strings.Contains(line, "-j DNAT") {
numEndpoints++
if strings.Contains(line, "--comment") {
numComments++
}
if strings.Contains(line, matchEndpoint) {
matched = line
}
}
}
return matched, numEndpoints, numComments
}
func TestSyncProxyRulesLargeClusterMode(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.masqueradeAll = true
fp.syncPeriod = 30 * time.Second
makeServiceMap(fp,
makeTestService("ns1", "svc1", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.41"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
}}
}),
makeTestService("ns2", "svc2", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.42"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p8080",
Port: 8080,
Protocol: v1.ProtocolTCP,
}}
}),
makeTestService("ns3", "svc3", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.43"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p8081",
Port: 8081,
Protocol: v1.ProtocolTCP,
}}
}),
)
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice("ns1", "svc1", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = make([]discovery.Endpoint, largeClusterEndpointsThreshold/2-1)
for i := range eps.Endpoints {
eps.Endpoints[i].Addresses = []string{fmt.Sprintf("10.0.%d.%d", i%256, i/256)}
}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
makeTestEndpointSlice("ns2", "svc2", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = make([]discovery.Endpoint, largeClusterEndpointsThreshold/2-1)
for i := range eps.Endpoints {
eps.Endpoints[i].Addresses = []string{fmt.Sprintf("10.1.%d.%d", i%256, i/256)}
}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p8080"),
Port: pointer.Int32(8080),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expectedEndpoints := 2 * (largeClusterEndpointsThreshold/2 - 1)
firstEndpoint, numEndpoints, numComments := countEndpointsAndComments(fp.iptablesData.String(), "10.0.0.0")
assert.Equal(t, "-A KUBE-SEP-DKGQUZGBKLTPAR56 -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.0.0:80", firstEndpoint)
if numEndpoints != expectedEndpoints {
t.Errorf("Found wrong number of endpoints: expected %d, got %d", expectedEndpoints, numEndpoints)
}
if numComments != numEndpoints {
t.Errorf("numComments (%d) != numEndpoints (%d) when numEndpoints < threshold (%d)", numComments, numEndpoints, largeClusterEndpointsThreshold)
}
fp.OnEndpointSliceAdd(makeTestEndpointSlice("ns3", "svc3", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"203.0.113.4"},
}, {
Addresses: []string{"203.0.113.8"},
}, {
Addresses: []string{"203.0.113.12"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p8081"),
Port: pointer.Int32(8081),
Protocol: &tcpProtocol,
}}
}))
fp.syncProxyRules()
expectedEndpoints += 3
firstEndpoint, numEndpoints, numComments = countEndpointsAndComments(fp.iptablesData.String(), "10.0.0.0")
assert.Equal(t, "-A KUBE-SEP-DKGQUZGBKLTPAR56 -m tcp -p tcp -j DNAT --to-destination 10.0.0.0:80", firstEndpoint)
if numEndpoints != expectedEndpoints {
t.Errorf("Found wrong number of endpoints: expected %d, got %d", expectedEndpoints, numEndpoints)
}
if numComments != 0 {
t.Errorf("numComments (%d) != 0 when numEndpoints (%d) > threshold (%d)", numComments, numEndpoints, largeClusterEndpointsThreshold)
}
// Now test service deletion; we have to create another service to do this though,
// because if we deleted any of the existing services, we'd fall back out of large
// cluster mode.
svc4 := makeTestService("ns4", "svc4", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.44"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p8082",
Port: 8082,
Protocol: v1.ProtocolTCP,
}}
})
fp.OnServiceAdd(svc4)
fp.OnEndpointSliceAdd(makeTestEndpointSlice("ns4", "svc4", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.4.0.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p8082"),
Port: pointer.Int32(8082),
Protocol: &tcpProtocol,
}}
}))
fp.syncProxyRules()
expectedEndpoints += 1
svc4Endpoint, numEndpoints, _ := countEndpointsAndComments(fp.iptablesData.String(), "10.4.0.1")
assert.Equal(t, "-A KUBE-SEP-SU5STNODRYEWJAUF -m tcp -p tcp -j DNAT --to-destination 10.4.0.1:8082", svc4Endpoint, "svc4 endpoint was not created")
if numEndpoints != expectedEndpoints {
t.Errorf("Found wrong number of endpoints after svc4 creation: expected %d, got %d", expectedEndpoints, numEndpoints)
}
// In large-cluster mode, if we delete a service, it will not re-sync its chains
// but it will not delete them immediately either.
fp.lastIPTablesCleanup = time.Now()
fp.OnServiceDelete(svc4)
fp.syncProxyRules()
expectedEndpoints -= 1
svc4Endpoint, numEndpoints, _ = countEndpointsAndComments(fp.iptablesData.String(), "10.4.0.1")
assert.Equal(t, "", svc4Endpoint, "svc4 endpoint was still created!")
if numEndpoints != expectedEndpoints {
t.Errorf("Found wrong number of endpoints after service deletion: expected %d, got %d", expectedEndpoints, numEndpoints)
}
assert.NotContains(t, fp.iptablesData.String(), "-X ", "iptables data unexpectedly contains chain deletions")
// But resyncing after a long-enough delay will delete the stale chains
fp.lastIPTablesCleanup = time.Now().Add(-fp.syncPeriod).Add(-1)
fp.syncProxyRules()
svc4Endpoint, numEndpoints, _ = countEndpointsAndComments(fp.iptablesData.String(), "10.4.0.1")
assert.Equal(t, "", svc4Endpoint, "svc4 endpoint was still created!")
if numEndpoints != expectedEndpoints {
t.Errorf("Found wrong number of endpoints after delayed resync: expected %d, got %d", expectedEndpoints, numEndpoints)
}
assert.Contains(t, fp.iptablesData.String(), "-X KUBE-SVC-EBDQOQU5SJFXRIL3", "iptables data does not contain chain deletion")
assert.Contains(t, fp.iptablesData.String(), "-X KUBE-SEP-SU5STNODRYEWJAUF", "iptables data does not contain endpoint deletions")
}
// Test calling syncProxyRules() multiple times with various changes
func TestSyncProxyRulesRepeated(t *testing.T) {
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
// Create initial state
var svc2 *v1.Service
makeServiceMap(fp,
makeTestService("ns1", "svc1", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.41"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
}}
}),
makeTestService("ns2", "svc2", func(svc *v1.Service) {
svc2 = svc
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.42"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p8080",
Port: 8080,
Protocol: v1.ProtocolTCP,
}}
}),
)
tcpProtocol := v1.ProtocolTCP
populateEndpointSlices(fp,
makeTestEndpointSlice("ns1", "svc1", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.0.1.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
makeTestEndpointSlice("ns2", "svc2", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.0.2.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p8080"),
Port: pointer.Int32(8080),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected := dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SEP-UHEGFW77JX3KXTOV - [0:0]
:KUBE-SVC-2VJB64SDSIJUP5T6 - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p8080 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 8080 -j KUBE-SVC-2VJB64SDSIJUP5T6
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-UHEGFW77JX3KXTOV -m comment --comment ns2/svc2:p8080 -s 10.0.2.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-UHEGFW77JX3KXTOV -m comment --comment ns2/svc2:p8080 -m tcp -p tcp -j DNAT --to-destination 10.0.2.1:8080
-A KUBE-SVC-2VJB64SDSIJUP5T6 -m comment --comment "ns2/svc2:p8080 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 8080 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-2VJB64SDSIJUP5T6 -m comment --comment "ns2/svc2:p8080 -> 10.0.2.1:8080" -j KUBE-SEP-UHEGFW77JX3KXTOV
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
// Add a new service and its endpoints
makeServiceMap(fp,
makeTestService("ns3", "svc3", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.43"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
}}
}),
)
var eps3 *discovery.EndpointSlice
populateEndpointSlices(fp,
makeTestEndpointSlice("ns3", "svc3", 1, func(eps *discovery.EndpointSlice) {
eps3 = eps
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.0.3.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected = dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-BSWRHOQ77KEXZLNL - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SEP-UHEGFW77JX3KXTOV - [0:0]
:KUBE-SVC-2VJB64SDSIJUP5T6 - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns2/svc2:p8080 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 8080 -j KUBE-SVC-2VJB64SDSIJUP5T6
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -s 10.0.3.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.1:80
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SEP-UHEGFW77JX3KXTOV -m comment --comment ns2/svc2:p8080 -s 10.0.2.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-UHEGFW77JX3KXTOV -m comment --comment ns2/svc2:p8080 -m tcp -p tcp -j DNAT --to-destination 10.0.2.1:8080
-A KUBE-SVC-2VJB64SDSIJUP5T6 -m comment --comment "ns2/svc2:p8080 cluster IP" -m tcp -p tcp -d 172.30.0.42 --dport 8080 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-2VJB64SDSIJUP5T6 -m comment --comment "ns2/svc2:p8080 -> 10.0.2.1:8080" -j KUBE-SEP-UHEGFW77JX3KXTOV
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.1:80" -j KUBE-SEP-BSWRHOQ77KEXZLNL
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
// Delete a service
fp.OnServiceDelete(svc2)
fp.syncProxyRules()
expected = dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-BSWRHOQ77KEXZLNL - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SEP-UHEGFW77JX3KXTOV - [0:0]
:KUBE-SVC-2VJB64SDSIJUP5T6 - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -s 10.0.3.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.1:80
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.1:80" -j KUBE-SEP-BSWRHOQ77KEXZLNL
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
-X KUBE-SEP-UHEGFW77JX3KXTOV
-X KUBE-SVC-2VJB64SDSIJUP5T6
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
// Add a service, sync, then add its endpoints
makeServiceMap(fp,
makeTestService("ns4", "svc4", func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeClusterIP
svc.Spec.ClusterIP = "172.30.0.44"
svc.Spec.Ports = []v1.ServicePort{{
Name: "p80",
Port: 80,
Protocol: v1.ProtocolTCP,
}}
}),
)
fp.syncProxyRules()
expected = dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 has no endpoints" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j REJECT
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-BSWRHOQ77KEXZLNL - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -s 10.0.3.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.1:80
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.1:80" -j KUBE-SEP-BSWRHOQ77KEXZLNL
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
populateEndpointSlices(fp,
makeTestEndpointSlice("ns4", "svc4", 1, func(eps *discovery.EndpointSlice) {
eps.AddressType = discovery.AddressTypeIPv4
eps.Endpoints = []discovery.Endpoint{{
Addresses: []string{"10.0.4.1"},
}}
eps.Ports = []discovery.EndpointPort{{
Name: pointer.String("p80"),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}}
}),
)
fp.syncProxyRules()
expected = dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-AYCN5HPXMIRJNJXU - [0:0]
:KUBE-SEP-BSWRHOQ77KEXZLNL - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -s 10.0.4.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.4.1:80
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -s 10.0.3.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-BSWRHOQ77KEXZLNL -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.1:80
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.0.4.1:80" -j KUBE-SEP-AYCN5HPXMIRJNJXU
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.1:80" -j KUBE-SEP-BSWRHOQ77KEXZLNL
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
// Change an endpoint of an existing service
eps3update := eps3.DeepCopy()
eps3update.Endpoints[0].Addresses[0] = "10.0.3.2"
fp.OnEndpointSliceUpdate(eps3, eps3update)
fp.syncProxyRules()
expected = dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-AYCN5HPXMIRJNJXU - [0:0]
:KUBE-SEP-BSWRHOQ77KEXZLNL - [0:0]
:KUBE-SEP-DKCFIS26GWF2WLWC - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -s 10.0.4.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.4.1:80
-A KUBE-SEP-DKCFIS26GWF2WLWC -m comment --comment ns3/svc3:p80 -s 10.0.3.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-DKCFIS26GWF2WLWC -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.2:80
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.0.4.1:80" -j KUBE-SEP-AYCN5HPXMIRJNJXU
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.2:80" -j KUBE-SEP-DKCFIS26GWF2WLWC
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
-X KUBE-SEP-BSWRHOQ77KEXZLNL
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
// Add an endpoint to a service
eps3update2 := eps3update.DeepCopy()
eps3update2.Endpoints = append(eps3update2.Endpoints, discovery.Endpoint{Addresses: []string{"10.0.3.3"}})
fp.OnEndpointSliceUpdate(eps3update, eps3update2)
fp.syncProxyRules()
expected = dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-AYCN5HPXMIRJNJXU - [0:0]
:KUBE-SEP-DKCFIS26GWF2WLWC - [0:0]
:KUBE-SEP-JVVZVJ7BSEPPRNBS - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -s 10.0.4.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.4.1:80
-A KUBE-SEP-DKCFIS26GWF2WLWC -m comment --comment ns3/svc3:p80 -s 10.0.3.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-DKCFIS26GWF2WLWC -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.2:80
-A KUBE-SEP-JVVZVJ7BSEPPRNBS -m comment --comment ns3/svc3:p80 -s 10.0.3.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-JVVZVJ7BSEPPRNBS -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.3:80
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.0.4.1:80" -j KUBE-SEP-AYCN5HPXMIRJNJXU
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-DKCFIS26GWF2WLWC
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.3:80" -j KUBE-SEP-JVVZVJ7BSEPPRNBS
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
// Sync with no new changes...
fp.syncProxyRules()
expected = dedent.Dedent(`
*filter
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-EXTERNAL-SERVICES - [0:0]
:KUBE-FORWARD - [0:0]
:KUBE-PROXY-FIREWALL - [0:0]
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
COMMIT
*nat
:KUBE-NODEPORTS - [0:0]
:KUBE-SERVICES - [0:0]
:KUBE-MARK-MASQ - [0:0]
:KUBE-POSTROUTING - [0:0]
:KUBE-SEP-AYCN5HPXMIRJNJXU - [0:0]
:KUBE-SEP-DKCFIS26GWF2WLWC - [0:0]
:KUBE-SEP-JVVZVJ7BSEPPRNBS - [0:0]
:KUBE-SEP-SNQ3ZNILQDEJNDQO - [0:0]
:KUBE-SVC-4SW47YFZTEDKD3PK - [0:0]
:KUBE-SVC-X27LE4BHSL4DOUIK - [0:0]
:KUBE-SVC-XPGD46QRK7WJZT7O - [0:0]
-A KUBE-SERVICES -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 -j KUBE-SVC-XPGD46QRK7WJZT7O
-A KUBE-SERVICES -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 -j KUBE-SVC-X27LE4BHSL4DOUIK
-A KUBE-SERVICES -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 -j KUBE-SVC-4SW47YFZTEDKD3PK
-A KUBE-SERVICES -m comment --comment "kubernetes service nodeports; NOTE: this must be the last rule in this chain" -m addrtype --dst-type LOCAL -j KUBE-NODEPORTS
-A KUBE-MARK-MASQ -j MARK --or-mark 0x4000
-A KUBE-POSTROUTING -m mark ! --mark 0x4000/0x4000 -j RETURN
-A KUBE-POSTROUTING -j MARK --xor-mark 0x4000
-A KUBE-POSTROUTING -m comment --comment "kubernetes service traffic requiring SNAT" -j MASQUERADE
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -s 10.0.4.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-AYCN5HPXMIRJNJXU -m comment --comment ns4/svc4:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.4.1:80
-A KUBE-SEP-DKCFIS26GWF2WLWC -m comment --comment ns3/svc3:p80 -s 10.0.3.2 -j KUBE-MARK-MASQ
-A KUBE-SEP-DKCFIS26GWF2WLWC -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.2:80
-A KUBE-SEP-JVVZVJ7BSEPPRNBS -m comment --comment ns3/svc3:p80 -s 10.0.3.3 -j KUBE-MARK-MASQ
-A KUBE-SEP-JVVZVJ7BSEPPRNBS -m comment --comment ns3/svc3:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.3.3:80
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -s 10.0.1.1 -j KUBE-MARK-MASQ
-A KUBE-SEP-SNQ3ZNILQDEJNDQO -m comment --comment ns1/svc1:p80 -m tcp -p tcp -j DNAT --to-destination 10.0.1.1:80
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 cluster IP" -m tcp -p tcp -d 172.30.0.44 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-4SW47YFZTEDKD3PK -m comment --comment "ns4/svc4:p80 -> 10.0.4.1:80" -j KUBE-SEP-AYCN5HPXMIRJNJXU
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 cluster IP" -m tcp -p tcp -d 172.30.0.43 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.2:80" -m statistic --mode random --probability 0.5000000000 -j KUBE-SEP-DKCFIS26GWF2WLWC
-A KUBE-SVC-X27LE4BHSL4DOUIK -m comment --comment "ns3/svc3:p80 -> 10.0.3.3:80" -j KUBE-SEP-JVVZVJ7BSEPPRNBS
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 cluster IP" -m tcp -p tcp -d 172.30.0.41 --dport 80 ! -s 10.0.0.0/8 -j KUBE-MARK-MASQ
-A KUBE-SVC-XPGD46QRK7WJZT7O -m comment --comment "ns1/svc1:p80 -> 10.0.1.1:80" -j KUBE-SEP-SNQ3ZNILQDEJNDQO
COMMIT
`)
assertIPTablesRulesEqual(t, getLine(), expected, fp.iptablesData.String())
}
func TestNoEndpointsMetric(t *testing.T) {
type endpoint struct {
ip string
hostname string
}
internalTrafficPolicyLocal := v1.ServiceInternalTrafficPolicyLocal
externalTrafficPolicyLocal := v1.ServiceExternalTrafficPolicyTypeLocal
metrics.RegisterMetrics()
testCases := []struct {
name string
internalTrafficPolicy *v1.ServiceInternalTrafficPolicyType
externalTrafficPolicy v1.ServiceExternalTrafficPolicyType
endpoints []endpoint
expectedSyncProxyRulesNoLocalEndpointsTotalInternal int
expectedSyncProxyRulesNoLocalEndpointsTotalExternal int
}{
{
name: "internalTrafficPolicy is set and there are local endpoints",
internalTrafficPolicy: &internalTrafficPolicyLocal,
endpoints: []endpoint{
{"10.0.1.1", testHostname},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
},
{
name: "externalTrafficPolicy is set and there are local endpoints",
externalTrafficPolicy: externalTrafficPolicyLocal,
endpoints: []endpoint{
{"10.0.1.1", testHostname},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
},
{
name: "both policies are set and there are local endpoints",
internalTrafficPolicy: &internalTrafficPolicyLocal,
externalTrafficPolicy: externalTrafficPolicyLocal,
endpoints: []endpoint{
{"10.0.1.1", testHostname},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
},
{
name: "internalTrafficPolicy is set and there are no local endpoints",
internalTrafficPolicy: &internalTrafficPolicyLocal,
endpoints: []endpoint{
{"10.0.1.1", "host0"},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
expectedSyncProxyRulesNoLocalEndpointsTotalInternal: 1,
},
{
name: "externalTrafficPolicy is set and there are no local endpoints",
externalTrafficPolicy: externalTrafficPolicyLocal,
endpoints: []endpoint{
{"10.0.1.1", "host0"},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
expectedSyncProxyRulesNoLocalEndpointsTotalExternal: 1,
},
{
name: "both policies are set and there are no local endpoints",
internalTrafficPolicy: &internalTrafficPolicyLocal,
externalTrafficPolicy: externalTrafficPolicyLocal,
endpoints: []endpoint{
{"10.0.1.1", "host0"},
{"10.0.1.2", "host1"},
{"10.0.1.3", "host2"},
},
expectedSyncProxyRulesNoLocalEndpointsTotalInternal: 1,
expectedSyncProxyRulesNoLocalEndpointsTotalExternal: 1,
},
{
name: "both policies are set and there are no endpoints at all",
internalTrafficPolicy: &internalTrafficPolicyLocal,
externalTrafficPolicy: externalTrafficPolicyLocal,
endpoints: []endpoint{},
expectedSyncProxyRulesNoLocalEndpointsTotalInternal: 0,
expectedSyncProxyRulesNoLocalEndpointsTotalExternal: 0,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
defer featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ServiceInternalTrafficPolicy, true)()
ipt := iptablestest.NewFake()
fp := NewFakeProxier(ipt)
fp.OnServiceSynced()
fp.OnEndpointSlicesSynced()
serviceName := "svc1"
namespaceName := "ns1"
svc := &v1.Service{
ObjectMeta: metav1.ObjectMeta{Name: serviceName, Namespace: namespaceName},
Spec: v1.ServiceSpec{
ClusterIP: "172.30.1.1",
Selector: map[string]string{"foo": "bar"},
Ports: []v1.ServicePort{{Name: "", Port: 80, Protocol: v1.ProtocolTCP, NodePort: 123}},
},
}
if tc.internalTrafficPolicy != nil {
svc.Spec.InternalTrafficPolicy = tc.internalTrafficPolicy
}
if tc.externalTrafficPolicy != "" {
svc.Spec.Type = v1.ServiceTypeNodePort
svc.Spec.ExternalTrafficPolicy = tc.externalTrafficPolicy
}
fp.OnServiceAdd(svc)
tcpProtocol := v1.ProtocolTCP
endpointSlice := &discovery.EndpointSlice{
ObjectMeta: metav1.ObjectMeta{
Name: fmt.Sprintf("%s-1", serviceName),
Namespace: namespaceName,
Labels: map[string]string{discovery.LabelServiceName: serviceName},
},
Ports: []discovery.EndpointPort{{
Name: pointer.String(""),
Port: pointer.Int32(80),
Protocol: &tcpProtocol,
}},
AddressType: discovery.AddressTypeIPv4,
}
for _, ep := range tc.endpoints {
endpointSlice.Endpoints = append(endpointSlice.Endpoints, discovery.Endpoint{
Addresses: []string{ep.ip},
Conditions: discovery.EndpointConditions{Ready: pointer.Bool(true)},
NodeName: pointer.String(ep.hostname),
})
}
fp.OnEndpointSliceAdd(endpointSlice)
fp.syncProxyRules()
syncProxyRulesNoLocalEndpointsTotalInternal, err := testutil.GetGaugeMetricValue(metrics.SyncProxyRulesNoLocalEndpointsTotal.WithLabelValues("internal"))
if err != nil {
t.Errorf("failed to get %s value, err: %v", metrics.SyncProxyRulesNoLocalEndpointsTotal.Name, err)
}
if tc.expectedSyncProxyRulesNoLocalEndpointsTotalInternal != int(syncProxyRulesNoLocalEndpointsTotalInternal) {
t.Errorf("sync_proxy_rules_no_endpoints_total metric mismatch(internal): got=%d, expected %d", int(syncProxyRulesNoLocalEndpointsTotalInternal), tc.expectedSyncProxyRulesNoLocalEndpointsTotalInternal)
}
syncProxyRulesNoLocalEndpointsTotalExternal, err := testutil.GetGaugeMetricValue(metrics.SyncProxyRulesNoLocalEndpointsTotal.WithLabelValues("external"))
if err != nil {
t.Errorf("failed to get %s value(external), err: %v", metrics.SyncProxyRulesNoLocalEndpointsTotal.Name, err)
}
if tc.expectedSyncProxyRulesNoLocalEndpointsTotalExternal != int(syncProxyRulesNoLocalEndpointsTotalExternal) {
t.Errorf("sync_proxy_rules_no_endpoints_total metric mismatch(internal): got=%d, expected %d", int(syncProxyRulesNoLocalEndpointsTotalExternal), tc.expectedSyncProxyRulesNoLocalEndpointsTotalExternal)
}
})
}
}
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