kubernetes options_test 源码

kubernetes options_test 代码

文件路径：/staging/src/k8s.io/controller-manager/pkg/leadermigration/options/options_test.go

/*
Copyright 2021 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 options

import (
	"io/ioutil"
	"os"
	"reflect"
	"testing"

	"github.com/spf13/pflag"

	"k8s.io/controller-manager/config"
	migrationconfig "k8s.io/controller-manager/pkg/leadermigration/config"
)

func TestLeaderMigrationOptions(t *testing.T) {
	testCases := []struct {
		name          string
		flags         []string
		configContent string
		expectEnabled bool
		expectErr     bool
		expectConfig  *config.LeaderMigrationConfiguration
	}{
		{
			name:          "enabled, with default configuration",
			flags:         []string{"--enable-leader-migration"},
			expectEnabled: true,
			expectErr:     false,
			expectConfig:  migrationconfig.DefaultLeaderMigrationConfiguration(),
		},
		{
			name:          "enabled, with custom configuration file",
			flags:         []string{"--enable-leader-migration"},
			expectEnabled: true,
			configContent: `
apiVersion: controllermanager.config.k8s.io/v1alpha1
kind: LeaderMigrationConfiguration
leaderName: test-leader-migration
resourceLock: leases
controllerLeaders: []
`,
			expectErr: false,
			expectConfig: &config.LeaderMigrationConfiguration{
				LeaderName:        "test-leader-migration",
				ResourceLock:      "leases",
				ControllerLeaders: []config.ControllerLeaderConfiguration{},
			},
		},
		{
			name:          "enabled, with custom configuration file (version v1beta1)",
			flags:         []string{"--enable-leader-migration"},
			expectEnabled: true,
			configContent: `
apiVersion: controllermanager.config.k8s.io/v1beta1
kind: LeaderMigrationConfiguration
leaderName: test-leader-migration
resourceLock: leases
controllerLeaders: []
`,
			expectErr: false,
			expectConfig: &config.LeaderMigrationConfiguration{
				LeaderName:        "test-leader-migration",
				ResourceLock:      "leases",
				ControllerLeaders: []config.ControllerLeaderConfiguration{},
			},
		},
		{
			name:          "enabled, with custom configuration file (version v1)",
			flags:         []string{"--enable-leader-migration"},
			expectEnabled: true,
			configContent: `
apiVersion: controllermanager.config.k8s.io/v1
kind: LeaderMigrationConfiguration
leaderName: test-leader-migration
controllerLeaders: []
`,
			expectErr: false,
			expectConfig: &config.LeaderMigrationConfiguration{
				LeaderName:        "test-leader-migration",
				ResourceLock:      "leases",
				ControllerLeaders: []config.ControllerLeaderConfiguration{},
			},
		},
		{
			name:          "enabled, with populated controllerLeaders (version v1)",
			flags:         []string{"--enable-leader-migration"},
			expectEnabled: true,
			configContent: `
apiVersion: controllermanager.config.k8s.io/v1
kind: LeaderMigrationConfiguration
leaderName: test-leader-migration
controllerLeaders:
  - name: route
    component: "*"
  - name: service
    component: "*"
  - name: cloud-node-lifecycle
    component: "*"
  - name: nodeipam
    component: "*"
`,
			expectErr: false,
			expectConfig: &config.LeaderMigrationConfiguration{
				LeaderName:   "test-leader-migration",
				ResourceLock: "leases",
				ControllerLeaders: []config.ControllerLeaderConfiguration{
					{
						Name:      "route",
						Component: "*",
					},
					{
						Name:      "service",
						Component: "*",
					},
					{
						Name:      "cloud-node-lifecycle",
						Component: "*",
					},
					{
						Name:      "nodeipam",
						Component: "*",
					},
				},
			},
		}, {
			name:          "enabled, with non-wildcard controllerLeaders (version v1)",
			flags:         []string{"--enable-leader-migration"},
			expectEnabled: true,
			configContent: `
apiVersion: controllermanager.config.k8s.io/v1
kind: LeaderMigrationConfiguration
leaderName: test-leader-migration
controllerLeaders:
  - name: route
    component: "cloud-controller-manager"
  - name: service
    component: "cloud-controller-manager"
  - name: cloud-node-lifecycle
    component: "cloud-controller-manager"
  - name: nodeipam
    component: "kube-controller-manager"
`,
			expectErr: false,
			expectConfig: &config.LeaderMigrationConfiguration{
				LeaderName:   "test-leader-migration",
				ResourceLock: "leases",
				ControllerLeaders: []config.ControllerLeaderConfiguration{
					{
						Name:      "route",
						Component: "cloud-controller-manager",
					},
					{
						Name:      "service",
						Component: "cloud-controller-manager",
					},
					{
						Name:      "cloud-node-lifecycle",
						Component: "cloud-controller-manager",
					},
					{
						Name:      "nodeipam",
						Component: "kube-controller-manager",
					},
				},
			},
		},
	}
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			flags := tc.flags
			if tc.configContent != "" {
				configFile, err := ioutil.TempFile("", tc.name)
				if err != nil {
					t.Fatal(err)
				}
				defer os.Remove(configFile.Name())
				err = ioutil.WriteFile(configFile.Name(), []byte(tc.configContent), os.FileMode(0755))
				if err != nil {
					t.Fatal(err)
				}
				flags = append(flags, "--leader-migration-config="+configFile.Name())
			}
			genericConfig := new(config.GenericControllerManagerConfiguration)
			options := new(LeaderMigrationOptions)
			fs := pflag.NewFlagSet("addflagstest", pflag.ContinueOnError)
			options.AddFlags(fs)
			err := fs.Parse(flags)
			if err != nil {
				t.Errorf("cannot parse leader-migration-config: %v", err)
				return
			}
			err = options.ApplyTo(genericConfig)
			if err != nil {
				if !tc.expectErr {
					t.Errorf("unexpected error: %v", err)
					return
				}
				// expect err and got err, finish the test case.
				return
			}
			if err == nil && tc.expectErr {
				t.Errorf("expected error but got nil")
				return
			}
			if genericConfig.LeaderMigrationEnabled != tc.expectEnabled {
				t.Errorf("expected Enabled=%v, got %v", tc.expectEnabled, options.Enabled)
				return
			}
			if tc.expectEnabled && !reflect.DeepEqual(tc.expectConfig, &genericConfig.LeaderMigration) {
				t.Errorf("expected config %#v but got %#v", tc.expectConfig, genericConfig.LeaderMigration)
			}
		})
	}

}

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