kubernetes audit_policy_test 源码
kubernetes audit_policy_test 代码
文件路径：/cluster/gce/gci/audit_policy_test.go
/*
Copyright 2019 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 gci
import (
"fmt"
"os"
"path/filepath"
"testing"
"k8s.io/apiserver/pkg/apis/audit"
auditinstall "k8s.io/apiserver/pkg/apis/audit/install"
auditpkg "k8s.io/apiserver/pkg/audit"
auditpolicy "k8s.io/apiserver/pkg/audit/policy"
"k8s.io/apiserver/pkg/authentication/serviceaccount"
"k8s.io/apiserver/pkg/authentication/user"
"k8s.io/apiserver/pkg/authorization/authorizer"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func init() {
// Register audit scheme to parse audit config.
auditinstall.Install(auditpkg.Scheme)
}
func TestCreateMasterAuditPolicy(t *testing.T) {
baseDir, err := os.MkdirTemp("", "configure-helper-test") // cleaned up by c.tearDown()
require.NoError(t, err, "Failed to create temp directory")
policyFile := filepath.Join(baseDir, "audit_policy.yaml")
c := ManifestTestCase{
t: t,
kubeHome: baseDir,
manifestFuncName: fmt.Sprintf("create-master-audit-policy %s", policyFile),
}
defer c.tearDown()
// Initialize required environment variables.
c.mustInvokeFunc(
kubeAPIServerEnv{KubeHome: c.kubeHome},
[]string{"configure-helper.sh"},
"base.template",
"testdata/kube-apiserver/base.template",
)
policy, err := auditpolicy.LoadPolicyFromFile(policyFile)
require.NoError(t, err, "Failed to load generated policy.")
// Users for test cases
var (
anonymous = newUserInfo(user.Anonymous, user.AllUnauthenticated)
kubeproxy = newUserInfo(user.KubeProxy, user.AllAuthenticated)
ingress = newUserInfo("system:unsecured", user.AllAuthenticated, user.SystemPrivilegedGroup)
kubelet = newUserInfo("kubelet", user.AllAuthenticated, user.NodesGroup)
node = newUserInfo("system:node:node-123", user.AllAuthenticated, user.NodesGroup)
controller = newUserInfo(user.KubeControllerManager, user.AllAuthenticated)
scheduler = newUserInfo(user.KubeScheduler, user.AllAuthenticated)
apiserver = newUserInfo(user.APIServerUser, user.SystemPrivilegedGroup)
autoscaler = newUserInfo("cluster-autoscaler", user.AllAuthenticated)
npd = newUserInfo("system:node-problem-detector", user.AllAuthenticated)
npdSA = serviceaccount.UserInfo("kube-system", "node-problem-detector", "")
namespaceController = serviceaccount.UserInfo("kube-system", "namespace-controller", "")
endpointController = serviceaccount.UserInfo("kube-system", "endpoint-controller", "")
defaultSA = serviceaccount.UserInfo("default", "default", "")
allUsers = []user.Info{anonymous, kubeproxy, ingress, kubelet, node, controller, scheduler, apiserver, autoscaler, npd, npdSA, namespaceController, endpointController, defaultSA}
)
// Resources for test cases
var (
nodes = resource("nodes")
nodeStatus = resource("nodes", "", "", "status")
endpoints = resource("endpoints", "default")
sysEndpoints = resource("endpoints", "kube-system")
services = resource("services", "default")
serviceStatus = resource("services", "default", "", "status")
configmaps = resource("configmaps", "default")
sysConfigmaps = resource("configmaps", "kube-system")
namespaces = resource("namespaces")
namespaceStatus = resource("namespaces", "", "", "status")
namespaceFinal = resource("namespaces", "", "", "finalize")
podMetrics = resource("podmetrics", "default", "metrics.k8s.io")
nodeMetrics = resource("nodemetrics", "", "metrics.k8s.io")
pods = resource("pods", "default")
podStatus = resource("pods", "default", "", "status")
secrets = resource("secrets", "default")
tokenReviews = resource("tokenreviews", "", "authentication.k8s.io")
deployments = resource("deployments", "default", "apps")
clusterRoles = resource("clusterroles", "", "rbac.authorization.k8s.io")
events = resource("events", "default")
foobars = resource("foos", "default", "example.com")
foobarbaz = resource("foos", "default", "example.com", "baz")
)
// Aliases
const (
none = audit.LevelNone
metadata = audit.LevelMetadata
request = audit.LevelRequest
response = audit.LevelRequestResponse
)
at := auditTester{
T: t,
evaluator: auditpolicy.NewPolicyRuleEvaluator(policy),
}
at.testResources(none, kubeproxy, "watch", endpoints, sysEndpoints, services, serviceStatus)
at.testResources(request, kubeproxy, "watch", nodes, pods)
at.testResources(none, ingress, "get", sysConfigmaps)
at.testResources(metadata, ingress, "get", configmaps)
at.testResources(none, kubelet, node, "get", nodes, nodeStatus)
at.testResources(metadata, kubelet, node, "get", sysConfigmaps, secrets)
at.testResources(response, kubelet, node, "create", deployments, pods)
at.testResources(none, controller, scheduler, endpointController, "get", "update", sysEndpoints)
at.testResources(request, controller, scheduler, endpointController, "get", endpoints)
at.testResources(response, controller, scheduler, endpointController, "update", endpoints)
at.testResources(none, apiserver, "get", namespaces, namespaceStatus, namespaceFinal)
at.testResources(metadata, apiserver, "get", "create", "update", sysConfigmaps, secrets)
at.testResources(none, autoscaler, "get", "update", sysConfigmaps, sysEndpoints)
at.testResources(metadata, autoscaler, "get", "update", configmaps)
at.testResources(response, autoscaler, "update", endpoints)
at.testResources(none, controller, "get", "list", podMetrics, nodeMetrics)
at.testNonResources(none, allUsers, "/healthz", "/healthz/etcd", "/swagger-2.0.0.json", "/swagger-2.0.0.pb-v1.gz", "/version")
at.testNonResources(metadata, allUsers, "/logs", "/openapi/v2", "/apis/policy", "/metrics", "/api")
at.testResources(none, node, apiserver, defaultSA, anonymous, "get", "list", "create", "patch", "update", "delete", events)
at.testResources(request, kubelet, node, npd, npdSA, "update", "patch", nodeStatus, podStatus)
at.testResources(request, namespaceController, "deletecollection", pods, namespaces)
at.testResources(metadata, defaultSA, anonymous, npd, namespaceController, "get", "create", "update", secrets, configmaps, sysConfigmaps, tokenReviews)
at.testResources(request, defaultSA, anonymous, npd, namespaceController, "get", "list", "watch", sysEndpoints, podMetrics, pods, clusterRoles, deployments)
at.testResources(response, defaultSA, anonymous, npd, namespaceController, "create", "update", "patch", "delete", sysEndpoints, podMetrics, pods, clusterRoles, deployments)
at.testResources(metadata, defaultSA, anonymous, npd, namespaceController, "get", "list", "watch", "create", "update", "patch", "delete", foobars, foobarbaz)
}
type auditTester struct {
*testing.T
evaluator auditpkg.PolicyRuleEvaluator
}
func (t *auditTester) testResources(level audit.Level, usrVerbRes ...interface{}) {
verbs := []string{}
users := []user.Info{}
resources := []Resource{}
for _, arg := range usrVerbRes {
switch v := arg.(type) {
case string:
verbs = append(verbs, v)
case user.Info:
users = append(users, v)
case Resource:
resources = append(resources, v)
default:
t.Fatalf("Invalid test argument: %+v", arg)
}
}
require.NotEmpty(t, verbs, "testcases must have a verb")
require.NotEmpty(t, users, "testcases must have a user")
require.NotEmpty(t, resources, "resource testcases must have a resource")
for _, usr := range users {
for _, verb := range verbs {
for _, res := range resources {
attrs := &authorizer.AttributesRecord{
User: usr,
Verb: verb,
Namespace: res.Namespace,
APIGroup: res.Group,
APIVersion: "v1",
Resource: res.Resource,
Subresource: res.Subresource,
ResourceRequest: true,
}
t.expectLevel(level, attrs)
}
}
}
}
func (t *auditTester) testNonResources(level audit.Level, users []user.Info, paths ...string) {
for _, usr := range users {
for _, verb := range []string{"get", "post"} {
for _, path := range paths {
attrs := &authorizer.AttributesRecord{
User: usr,
Verb: verb,
ResourceRequest: false,
Path: path,
}
t.expectLevel(level, attrs)
}
}
}
}
func (t *auditTester) expectLevel(expected audit.Level, attrs authorizer.Attributes) {
obj := attrs.GetPath()
if attrs.IsResourceRequest() {
obj = attrs.GetResource()
if attrs.GetNamespace() != "" {
obj = obj + ":" + attrs.GetNamespace()
}
}
name := fmt.Sprintf("%s.%s.%s", attrs.GetUser().GetName(), attrs.GetVerb(), obj)
evaluator := t.evaluator
t.Run(name, func(t *testing.T) {
auditConfig := evaluator.EvaluatePolicyRule(attrs)
assert.Equal(t, expected, auditConfig.Level)
if auditConfig.Level != audit.LevelNone {
assert.ElementsMatch(t, auditConfig.OmitStages, []audit.Stage{audit.StageRequestReceived})
}
})
}
func newUserInfo(name string, groups ...string) user.Info {
return &user.DefaultInfo{
Name: name,
Groups: groups,
}
}
type Resource struct {
Group, Resource, Subresource, Namespace string
}
func resource(kind string, nsGroupSub ...string) Resource {
res := Resource{Resource: kind}
if len(nsGroupSub) > 0 {
res.Namespace = nsGroupSub[0]
}
if len(nsGroupSub) > 1 {
res.Group = nsGroupSub[1]
}
if len(nsGroupSub) > 2 {
res.Subresource = nsGroupSub[2]
}
return res
}
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