mirror of
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449 lines
16 KiB
Go
449 lines
16 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package replicationcontroller
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import (
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"fmt"
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"net/http/httptest"
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"reflect"
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"testing"
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"time"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/wait"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/tools/cache"
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"k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
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informers "k8s.io/kubernetes/pkg/client/informers/informers_generated/externalversions"
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"k8s.io/kubernetes/pkg/controller/replication"
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"k8s.io/kubernetes/test/integration/framework"
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)
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func testLabels() map[string]string {
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return map[string]string{"name": "test"}
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}
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func newRC(name, namespace string, replicas int) *v1.ReplicationController {
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replicasCopy := int32(replicas)
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return &v1.ReplicationController{
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TypeMeta: metav1.TypeMeta{
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Kind: "ReplicationController",
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APIVersion: "v1",
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},
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ObjectMeta: metav1.ObjectMeta{
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Namespace: namespace,
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Name: name,
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},
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Spec: v1.ReplicationControllerSpec{
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Selector: testLabels(),
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Replicas: &replicasCopy,
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Template: &v1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: testLabels(),
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "fake-name",
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Image: "fakeimage",
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},
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},
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},
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},
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},
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}
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}
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func newMatchingPod(podName, namespace string) *v1.Pod {
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return &v1.Pod{
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TypeMeta: metav1.TypeMeta{
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Kind: "Pod",
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APIVersion: "v1",
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},
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ObjectMeta: metav1.ObjectMeta{
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Name: podName,
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Namespace: namespace,
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Labels: testLabels(),
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},
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Spec: v1.PodSpec{
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Containers: []v1.Container{
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{
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Name: "fake-name",
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Image: "fakeimage",
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},
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},
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},
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Status: v1.PodStatus{
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Phase: v1.PodRunning,
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},
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}
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}
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// verifyRemainingObjects verifies if the number of the remaining replication
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// controllers and pods are rcNum and podNum. It returns error if the
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// communication with the API server fails.
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func verifyRemainingObjects(t *testing.T, clientSet clientset.Interface, namespace string, rcNum, podNum int) (bool, error) {
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rcClient := clientSet.Core().ReplicationControllers(namespace)
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podClient := clientSet.Core().Pods(namespace)
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pods, err := podClient.List(metav1.ListOptions{})
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if err != nil {
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return false, fmt.Errorf("Failed to list pods: %v", err)
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}
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var ret = true
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if len(pods.Items) != podNum {
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ret = false
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t.Logf("expect %d pods, got %d pods", podNum, len(pods.Items))
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}
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rcs, err := rcClient.List(metav1.ListOptions{})
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if err != nil {
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return false, fmt.Errorf("Failed to list replication controllers: %v", err)
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}
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if len(rcs.Items) != rcNum {
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ret = false
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t.Logf("expect %d RCs, got %d RCs", rcNum, len(rcs.Items))
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}
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return ret, nil
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}
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func rmSetup(t *testing.T, stopCh chan struct{}) (*httptest.Server, framework.CloseFunc, *replication.ReplicationManager, informers.SharedInformerFactory, clientset.Interface) {
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masterConfig := framework.NewIntegrationTestMasterConfig()
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_, s, closeFn := framework.RunAMaster(masterConfig)
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config := restclient.Config{Host: s.URL}
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clientSet, err := clientset.NewForConfig(&config)
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if err != nil {
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t.Fatalf("Error in create clientset: %v", err)
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}
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resyncPeriod := 12 * time.Hour
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informers := informers.NewSharedInformerFactory(clientSet, resyncPeriod)
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rm := replication.NewReplicationManager(informers.Core().V1().Pods(), informers.Core().V1().ReplicationControllers(), clientSet, replication.BurstReplicas)
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informers.Start(stopCh)
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return s, closeFn, rm, informers, clientSet
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}
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// wait for the podInformer to observe the pods. Call this function before
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// running the RC manager to prevent the rc manager from creating new pods
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// rather than adopting the existing ones.
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func waitToObservePods(t *testing.T, podInformer cache.SharedIndexInformer, podNum int) {
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if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
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objects := podInformer.GetIndexer().List()
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if len(objects) == podNum {
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return true, nil
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} else {
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return false, nil
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}
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}); err != nil {
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t.Fatal(err)
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}
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}
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func TestAdoption(t *testing.T) {
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boolPtr := func(b bool) *bool { return &b }
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testCases := []struct {
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name string
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existingOwnerReferences func(rc *v1.ReplicationController) []metav1.OwnerReference
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expectedOwnerReferences func(rc *v1.ReplicationController) []metav1.OwnerReference
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}{
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{
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"pod refers rc as an owner, not a controller",
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{{UID: rc.UID, Name: rc.Name, APIVersion: "v1", Kind: "ReplicationController"}}
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},
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{{UID: rc.UID, Name: rc.Name, APIVersion: "v1", Kind: "ReplicationController", Controller: boolPtr(true), BlockOwnerDeletion: boolPtr(true)}}
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},
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},
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{
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"pod doesn't have owner references",
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{}
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},
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{{UID: rc.UID, Name: rc.Name, APIVersion: "v1", Kind: "ReplicationController", Controller: boolPtr(true), BlockOwnerDeletion: boolPtr(true)}}
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},
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},
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{
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"pod refers rc as a controller",
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{{UID: rc.UID, Name: rc.Name, APIVersion: "v1", Kind: "ReplicationController", Controller: boolPtr(true)}}
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},
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{{UID: rc.UID, Name: rc.Name, APIVersion: "v1", Kind: "ReplicationController", Controller: boolPtr(true)}}
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},
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},
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{
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"pod refers other rc as the controller, refers the rc as an owner",
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{
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{UID: "1", Name: "anotherRC", APIVersion: "v1", Kind: "ReplicationController", Controller: boolPtr(true)},
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{UID: rc.UID, Name: rc.Name, APIVersion: "v1", Kind: "ReplicationController"},
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}
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},
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func(rc *v1.ReplicationController) []metav1.OwnerReference {
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return []metav1.OwnerReference{
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{UID: "1", Name: "anotherRC", APIVersion: "v1", Kind: "ReplicationController", Controller: boolPtr(true)},
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{UID: rc.UID, Name: rc.Name, APIVersion: "v1", Kind: "ReplicationController"},
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}
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},
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},
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}
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for i, tc := range testCases {
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stopCh := make(chan struct{})
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s, closeFn, rm, informers, clientSet := rmSetup(t, stopCh)
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defer closeFn()
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ns := framework.CreateTestingNamespace(fmt.Sprintf("adoption-%d", i), s, t)
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defer framework.DeleteTestingNamespace(ns, s, t)
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rcClient := clientSet.Core().ReplicationControllers(ns.Name)
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podClient := clientSet.Core().Pods(ns.Name)
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const rcName = "rc"
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rc, err := rcClient.Create(newRC(rcName, ns.Name, 1))
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if err != nil {
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t.Fatalf("Failed to create replication controller: %v", err)
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}
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podName := fmt.Sprintf("pod%d", i)
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pod := newMatchingPod(podName, ns.Name)
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pod.OwnerReferences = tc.existingOwnerReferences(rc)
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_, err = podClient.Create(pod)
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if err != nil {
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t.Fatalf("Failed to create Pod: %v", err)
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}
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informers.Start(stopCh)
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waitToObservePods(t, informers.Core().V1().Pods().Informer(), 1)
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go rm.Run(5, stopCh)
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if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
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updatedPod, err := podClient.Get(pod.Name, metav1.GetOptions{})
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if err != nil {
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return false, err
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}
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if e, a := tc.expectedOwnerReferences(rc), updatedPod.OwnerReferences; reflect.DeepEqual(e, a) {
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return true, nil
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} else {
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t.Logf("ownerReferences don't match, expect %v, got %v", e, a)
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return false, nil
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}
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}); err != nil {
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t.Fatalf("test %q failed: %v", tc.name, err)
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}
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close(stopCh)
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}
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}
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func createRCsPods(t *testing.T, clientSet clientset.Interface, rcs []*v1.ReplicationController, pods []*v1.Pod, ns string) {
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rcClient := clientSet.Core().ReplicationControllers(ns)
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podClient := clientSet.Core().Pods(ns)
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for _, rc := range rcs {
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if _, err := rcClient.Create(rc); err != nil {
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t.Fatalf("Failed to create replication controller %s: %v", rc.Name, err)
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}
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}
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for _, pod := range pods {
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if _, err := podClient.Create(pod); err != nil {
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t.Fatalf("Failed to create pod %s: %v", pod.Name, err)
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}
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}
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}
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func waitRCStable(t *testing.T, clientSet clientset.Interface, rc *v1.ReplicationController, ns string) {
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rcClient := clientSet.Core().ReplicationControllers(ns)
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if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
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updatedRC, err := rcClient.Get(rc.Name, metav1.GetOptions{})
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if err != nil {
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return false, err
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}
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if updatedRC.Status.Replicas != *rc.Spec.Replicas {
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return false, nil
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} else {
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return true, nil
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}
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}); err != nil {
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t.Fatal(err)
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}
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}
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func TestUpdateSelectorToAdopt(t *testing.T) {
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// We have pod1, pod2 and rc. rc.spec.replicas=1. At first rc.Selector
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// matches pod1 only; change the selector to match pod2 as well. Verify
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// there is only one pod left.
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stopCh := make(chan struct{})
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s, closeFn, rm, _, clientSet := rmSetup(t, stopCh)
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defer closeFn()
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ns := framework.CreateTestingNamespace("update-selector-to-adopt", s, t)
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defer framework.DeleteTestingNamespace(ns, s, t)
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rc := newRC("rc", ns.Name, 1)
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// let rc's selector only match pod1
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rc.Spec.Selector["uniqueKey"] = "1"
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rc.Spec.Template.Labels["uniqueKey"] = "1"
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pod1 := newMatchingPod("pod1", ns.Name)
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pod1.Labels["uniqueKey"] = "1"
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pod2 := newMatchingPod("pod2", ns.Name)
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pod2.Labels["uniqueKey"] = "2"
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createRCsPods(t, clientSet, []*v1.ReplicationController{rc}, []*v1.Pod{pod1, pod2}, ns.Name)
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go rm.Run(5, stopCh)
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waitRCStable(t, clientSet, rc, ns.Name)
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// change the rc's selector to match both pods
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patch := `{"spec":{"selector":{"uniqueKey":null}}}`
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rcClient := clientSet.Core().ReplicationControllers(ns.Name)
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rc, err := rcClient.Patch(rc.Name, types.StrategicMergePatchType, []byte(patch))
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if err != nil {
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t.Fatalf("Failed to patch replication controller: %v", err)
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}
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t.Logf("patched rc = %#v", rc)
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// wait for the rc select both pods and delete one of them
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if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
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return verifyRemainingObjects(t, clientSet, ns.Name, 1, 1)
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}); err != nil {
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t.Fatal(err)
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}
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close(stopCh)
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}
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func TestUpdateSelectorToRemoveControllerRef(t *testing.T) {
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// We have pod1, pod2 and rc. rc.spec.replicas=2. At first rc.Selector
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// matches pod1 and pod2; change the selector to match only pod1. Verify
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// that rc creates one more pod, so there are 3 pods. Also verify that
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// pod2's controllerRef is cleared.
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stopCh := make(chan struct{})
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s, closeFn, rm, informers, clientSet := rmSetup(t, stopCh)
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defer closeFn()
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ns := framework.CreateTestingNamespace("update-selector-to-remove-controllerref", s, t)
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defer framework.DeleteTestingNamespace(ns, s, t)
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rc := newRC("rc", ns.Name, 2)
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pod1 := newMatchingPod("pod1", ns.Name)
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pod1.Labels["uniqueKey"] = "1"
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pod2 := newMatchingPod("pod2", ns.Name)
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pod2.Labels["uniqueKey"] = "2"
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createRCsPods(t, clientSet, []*v1.ReplicationController{rc}, []*v1.Pod{pod1, pod2}, ns.Name)
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waitToObservePods(t, informers.Core().V1().Pods().Informer(), 2)
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go rm.Run(5, stopCh)
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waitRCStable(t, clientSet, rc, ns.Name)
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// change the rc's selector to match both pods
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patch := `{"spec":{"selector":{"uniqueKey":"1"},"template":{"metadata":{"labels":{"uniqueKey":"1"}}}}}`
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rcClient := clientSet.Core().ReplicationControllers(ns.Name)
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rc, err := rcClient.Patch(rc.Name, types.StrategicMergePatchType, []byte(patch))
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if err != nil {
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t.Fatalf("Failed to patch replication controller: %v", err)
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}
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t.Logf("patched rc = %#v", rc)
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// wait for the rc to create one more pod
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if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
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return verifyRemainingObjects(t, clientSet, ns.Name, 1, 3)
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}); err != nil {
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t.Fatal(err)
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}
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podClient := clientSet.Core().Pods(ns.Name)
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pod2, err = podClient.Get(pod2.Name, metav1.GetOptions{})
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if err != nil {
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t.Fatalf("Failed to get pod2: %v", err)
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}
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if len(pod2.OwnerReferences) != 0 {
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t.Fatalf("ownerReferences of pod2 is not cleared, got %#v", pod2.OwnerReferences)
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}
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close(stopCh)
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}
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func TestUpdateLabelToRemoveControllerRef(t *testing.T) {
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// We have pod1, pod2 and rc. rc.spec.replicas=2. At first rc.Selector
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// matches pod1 and pod2; change pod2's labels to non-matching. Verify
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// that rc creates one more pod, so there are 3 pods. Also verify that
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// pod2's controllerRef is cleared.
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stopCh := make(chan struct{})
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s, closeFn, rm, _, clientSet := rmSetup(t, stopCh)
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defer closeFn()
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ns := framework.CreateTestingNamespace("update-label-to-remove-controllerref", s, t)
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defer framework.DeleteTestingNamespace(ns, s, t)
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rc := newRC("rc", ns.Name, 2)
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pod1 := newMatchingPod("pod1", ns.Name)
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pod2 := newMatchingPod("pod2", ns.Name)
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createRCsPods(t, clientSet, []*v1.ReplicationController{rc}, []*v1.Pod{pod1, pod2}, ns.Name)
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go rm.Run(5, stopCh)
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waitRCStable(t, clientSet, rc, ns.Name)
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// change the rc's selector to match both pods
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patch := `{"metadata":{"labels":{"name":null}}}`
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podClient := clientSet.Core().Pods(ns.Name)
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pod2, err := podClient.Patch(pod2.Name, types.StrategicMergePatchType, []byte(patch))
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if err != nil {
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t.Fatalf("Failed to patch pod2: %v", err)
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}
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t.Logf("patched pod2 = %#v", pod2)
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// wait for the rc to create one more pod
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if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
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return verifyRemainingObjects(t, clientSet, ns.Name, 1, 3)
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}); err != nil {
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t.Fatal(err)
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}
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pod2, err = podClient.Get(pod2.Name, metav1.GetOptions{})
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if err != nil {
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t.Fatalf("Failed to get pod2: %v", err)
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}
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if len(pod2.OwnerReferences) != 0 {
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t.Fatalf("ownerReferences of pod2 is not cleared, got %#v", pod2.OwnerReferences)
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}
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close(stopCh)
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}
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func TestUpdateLabelToBeAdopted(t *testing.T) {
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// We have pod1, pod2 and rc. rc.spec.replicas=1. At first rc.Selector
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// matches pod1 only; change pod2's labels to be matching. Verify the RC
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// controller adopts pod2 and delete one of them, so there is only 1 pod
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// left.
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stopCh := make(chan struct{})
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s, closeFn, rm, _, clientSet := rmSetup(t, stopCh)
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defer closeFn()
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ns := framework.CreateTestingNamespace("update-label-to-be-adopted", s, t)
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defer framework.DeleteTestingNamespace(ns, s, t)
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rc := newRC("rc", ns.Name, 1)
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// let rc's selector only matches pod1
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rc.Spec.Selector["uniqueKey"] = "1"
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rc.Spec.Template.Labels["uniqueKey"] = "1"
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pod1 := newMatchingPod("pod1", ns.Name)
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pod1.Labels["uniqueKey"] = "1"
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pod2 := newMatchingPod("pod2", ns.Name)
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pod2.Labels["uniqueKey"] = "2"
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createRCsPods(t, clientSet, []*v1.ReplicationController{rc}, []*v1.Pod{pod1, pod2}, ns.Name)
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go rm.Run(5, stopCh)
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waitRCStable(t, clientSet, rc, ns.Name)
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// change the rc's selector to match both pods
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patch := `{"metadata":{"labels":{"uniqueKey":"1"}}}`
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podClient := clientSet.Core().Pods(ns.Name)
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pod2, err := podClient.Patch(pod2.Name, types.StrategicMergePatchType, []byte(patch))
|
|
if err != nil {
|
|
t.Fatalf("Failed to patch pod2: %v", err)
|
|
}
|
|
t.Logf("patched pod2 = %#v", pod2)
|
|
// wait for the rc to select both pods and delete one of them
|
|
if err := wait.Poll(10*time.Second, 60*time.Second, func() (bool, error) {
|
|
return verifyRemainingObjects(t, clientSet, ns.Name, 1, 1)
|
|
}); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
close(stopCh)
|
|
}
|