mirror of
https://github.com/k3s-io/kubernetes.git
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289 lines
9.2 KiB
Go
289 lines
9.2 KiB
Go
/*
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Copyright 2019 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 disruption
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import (
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"context"
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"fmt"
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"testing"
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"time"
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v1 "k8s.io/api/core/v1"
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"k8s.io/api/policy/v1beta1"
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apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
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apiextensionsclientset "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/util/intstr"
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"k8s.io/apimachinery/pkg/util/wait"
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cacheddiscovery "k8s.io/client-go/discovery/cached/memory"
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"k8s.io/client-go/dynamic"
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"k8s.io/client-go/informers"
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clientset "k8s.io/client-go/kubernetes"
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restclient "k8s.io/client-go/rest"
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"k8s.io/client-go/restmapper"
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"k8s.io/client-go/scale"
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"k8s.io/client-go/tools/cache"
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kubeapiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
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"k8s.io/kubernetes/pkg/controller/disruption"
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"k8s.io/kubernetes/test/integration/etcd"
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"k8s.io/kubernetes/test/integration/framework"
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)
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func setup(t *testing.T) (*kubeapiservertesting.TestServer, *disruption.DisruptionController, informers.SharedInformerFactory, clientset.Interface, *apiextensionsclientset.Clientset, dynamic.Interface) {
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server := kubeapiservertesting.StartTestServerOrDie(t, nil, []string{"--disable-admission-plugins", "ServiceAccount"}, framework.SharedEtcd())
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clientSet, err := clientset.NewForConfig(server.ClientConfig)
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if err != nil {
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t.Fatalf("Error creating clientset: %v", err)
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}
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resyncPeriod := 12 * time.Hour
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informers := informers.NewSharedInformerFactory(clientset.NewForConfigOrDie(restclient.AddUserAgent(server.ClientConfig, "pdb-informers")), resyncPeriod)
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client := clientset.NewForConfigOrDie(restclient.AddUserAgent(server.ClientConfig, "disruption-controller"))
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discoveryClient := cacheddiscovery.NewMemCacheClient(clientSet.Discovery())
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mapper := restmapper.NewDeferredDiscoveryRESTMapper(discoveryClient)
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scaleKindResolver := scale.NewDiscoveryScaleKindResolver(client.Discovery())
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scaleClient, err := scale.NewForConfig(server.ClientConfig, mapper, dynamic.LegacyAPIPathResolverFunc, scaleKindResolver)
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if err != nil {
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t.Fatalf("Error creating scaleClient: %v", err)
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}
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apiExtensionClient, err := apiextensionsclientset.NewForConfig(server.ClientConfig)
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if err != nil {
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t.Fatalf("Error creating extension clientset: %v", err)
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}
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dynamicClient, err := dynamic.NewForConfig(server.ClientConfig)
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if err != nil {
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t.Fatalf("Error creating dynamicClient: %v", err)
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}
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pdbc := disruption.NewDisruptionController(
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informers.Core().V1().Pods(),
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informers.Policy().V1beta1().PodDisruptionBudgets(),
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informers.Core().V1().ReplicationControllers(),
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informers.Apps().V1().ReplicaSets(),
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informers.Apps().V1().Deployments(),
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informers.Apps().V1().StatefulSets(),
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client,
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mapper,
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scaleClient,
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)
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return server, pdbc, informers, clientSet, apiExtensionClient, dynamicClient
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}
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func TestPDBWithScaleSubresource(t *testing.T) {
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s, pdbc, informers, clientSet, apiExtensionClient, dynamicClient := setup(t)
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defer s.TearDownFn()
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nsName := "pdb-scale-subresource"
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createNs(t, nsName, clientSet)
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stopCh := make(chan struct{})
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informers.Start(stopCh)
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go pdbc.Run(stopCh)
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defer close(stopCh)
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crdDefinition := newCustomResourceDefinition()
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etcd.CreateTestCRDs(t, apiExtensionClient, true, crdDefinition)
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gvr := schema.GroupVersionResource{Group: crdDefinition.Spec.Group, Version: crdDefinition.Spec.Version, Resource: crdDefinition.Spec.Names.Plural}
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resourceClient := dynamicClient.Resource(gvr).Namespace(nsName)
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replicas := 4
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maxUnavailable := int32(2)
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podLabelValue := "test-crd"
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resource := &unstructured.Unstructured{
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Object: map[string]interface{}{
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"kind": crdDefinition.Spec.Names.Kind,
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"apiVersion": crdDefinition.Spec.Group + "/" + crdDefinition.Spec.Version,
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"metadata": map[string]interface{}{
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"name": "resource",
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"namespace": nsName,
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},
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"spec": map[string]interface{}{
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"replicas": replicas,
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},
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},
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}
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createdResource, err := resourceClient.Create(context.TODO(), resource, metav1.CreateOptions{})
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if err != nil {
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t.Error(err)
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}
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trueValue := true
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ownerRef := metav1.OwnerReference{
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Name: resource.GetName(),
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Kind: crdDefinition.Spec.Names.Kind,
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APIVersion: crdDefinition.Spec.Group + "/" + crdDefinition.Spec.Version,
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UID: createdResource.GetUID(),
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Controller: &trueValue,
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}
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for i := 0; i < replicas; i++ {
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createPod(t, fmt.Sprintf("pod-%d", i), nsName, podLabelValue, clientSet, ownerRef)
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}
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waitToObservePods(t, informers.Core().V1().Pods().Informer(), 4, v1.PodRunning)
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pdb := &v1beta1.PodDisruptionBudget{
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ObjectMeta: metav1.ObjectMeta{
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Name: "test-pdb",
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},
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Spec: v1beta1.PodDisruptionBudgetSpec{
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MaxUnavailable: &intstr.IntOrString{
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Type: intstr.Int,
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IntVal: maxUnavailable,
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},
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Selector: &metav1.LabelSelector{
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MatchLabels: map[string]string{"app": podLabelValue},
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},
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},
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}
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if _, err := clientSet.PolicyV1beta1().PodDisruptionBudgets(nsName).Create(context.TODO(), pdb, metav1.CreateOptions{}); err != nil {
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t.Errorf("Error creating PodDisruptionBudget: %v", err)
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}
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waitPDBStable(t, clientSet, 4, nsName, pdb.Name)
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newPdb, err := clientSet.PolicyV1beta1().PodDisruptionBudgets(nsName).Get(context.TODO(), pdb.Name, metav1.GetOptions{})
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if err != nil {
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t.Errorf("Error getting PodDisruptionBudget: %v", err)
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}
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if expected, found := int32(replicas), newPdb.Status.ExpectedPods; expected != found {
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t.Errorf("Expected %d, but found %d", expected, found)
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}
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if expected, found := int32(replicas)-maxUnavailable, newPdb.Status.DesiredHealthy; expected != found {
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t.Errorf("Expected %d, but found %d", expected, found)
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}
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if expected, found := maxUnavailable, newPdb.Status.DisruptionsAllowed; expected != found {
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t.Errorf("Expected %d, but found %d", expected, found)
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}
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}
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func createPod(t *testing.T, name, namespace, labelValue string, clientSet clientset.Interface, ownerRef metav1.OwnerReference) {
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pod := &v1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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Namespace: namespace,
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Labels: map[string]string{"app": labelValue},
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OwnerReferences: []metav1.OwnerReference{
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ownerRef,
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},
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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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_, err := clientSet.CoreV1().Pods(namespace).Create(context.TODO(), pod, metav1.CreateOptions{})
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if err != nil {
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t.Error(err)
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}
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addPodConditionReady(pod)
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if _, err := clientSet.CoreV1().Pods(namespace).UpdateStatus(context.TODO(), pod, metav1.UpdateOptions{}); err != nil {
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t.Error(err)
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}
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}
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func createNs(t *testing.T, name string, clientSet clientset.Interface) {
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_, err := clientSet.CoreV1().Namespaces().Create(context.TODO(), &v1.Namespace{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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},
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}, metav1.CreateOptions{})
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if err != nil {
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t.Errorf("Error creating namespace: %v", err)
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}
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}
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func addPodConditionReady(pod *v1.Pod) {
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pod.Status = v1.PodStatus{
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Phase: v1.PodRunning,
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Conditions: []v1.PodCondition{
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{
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Type: v1.PodReady,
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Status: v1.ConditionTrue,
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},
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},
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}
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}
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func newCustomResourceDefinition() *apiextensionsv1beta1.CustomResourceDefinition {
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return &apiextensionsv1beta1.CustomResourceDefinition{
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ObjectMeta: metav1.ObjectMeta{Name: "crds.mygroup.example.com"},
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Spec: apiextensionsv1beta1.CustomResourceDefinitionSpec{
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Group: "mygroup.example.com",
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Version: "v1beta1",
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Names: apiextensionsv1beta1.CustomResourceDefinitionNames{
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Plural: "crds",
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Singular: "crd",
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Kind: "Crd",
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ListKind: "CrdList",
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},
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Scope: apiextensionsv1beta1.NamespaceScoped,
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Subresources: &apiextensionsv1beta1.CustomResourceSubresources{
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Scale: &apiextensionsv1beta1.CustomResourceSubresourceScale{
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SpecReplicasPath: ".spec.replicas",
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StatusReplicasPath: ".status.replicas",
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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 waitPDBStable(t *testing.T, clientSet clientset.Interface, podNum int32, ns, pdbName string) {
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if err := wait.PollImmediate(2*time.Second, 60*time.Second, func() (bool, error) {
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pdb, err := clientSet.PolicyV1beta1().PodDisruptionBudgets(ns).Get(context.TODO(), pdbName, 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 pdb.Status.CurrentHealthy != podNum {
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return false, nil
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}
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return true, nil
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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 waitToObservePods(t *testing.T, podInformer cache.SharedIndexInformer, podNum int, phase v1.PodPhase) {
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if err := wait.PollImmediate(2*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 false, nil
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}
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for _, obj := range objects {
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pod := obj.(*v1.Pod)
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if pod.Status.Phase != phase {
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return false, nil
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}
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}
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return true, nil
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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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