251 lines
8.1 KiB
Go
251 lines
8.1 KiB
Go
/*
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Copyright 2016 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 e2e
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import (
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"fmt"
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"time"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/api/v1"
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extensions "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
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"k8s.io/kubernetes/pkg/controller/replicaset"
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"k8s.io/kubernetes/pkg/util/uuid"
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"k8s.io/kubernetes/test/e2e/framework"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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func newRS(rsName string, replicas int32, rsPodLabels map[string]string, imageName string, image string) *extensions.ReplicaSet {
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zero := int64(0)
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return &extensions.ReplicaSet{
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ObjectMeta: metav1.ObjectMeta{
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Name: rsName,
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},
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Spec: extensions.ReplicaSetSpec{
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Replicas: func(i int32) *int32 { return &i }(replicas),
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Template: v1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: rsPodLabels,
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},
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Spec: v1.PodSpec{
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TerminationGracePeriodSeconds: &zero,
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Containers: []v1.Container{
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{
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Name: imageName,
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Image: image,
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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 newPodQuota(name, number string) *v1.ResourceQuota {
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return &v1.ResourceQuota{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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},
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Spec: v1.ResourceQuotaSpec{
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Hard: v1.ResourceList{
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v1.ResourcePods: resource.MustParse(number),
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},
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},
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}
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}
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var _ = framework.KubeDescribe("ReplicaSet", func() {
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f := framework.NewDefaultFramework("replicaset")
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It("should serve a basic image on each replica with a public image [Conformance]", func() {
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ReplicaSetServeImageOrFail(f, "basic", "gcr.io/google_containers/serve_hostname:v1.4")
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})
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It("should serve a basic image on each replica with a private image", func() {
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// requires private images
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framework.SkipUnlessProviderIs("gce", "gke")
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ReplicaSetServeImageOrFail(f, "private", "b.gcr.io/k8s_authenticated_test/serve_hostname:v1.4")
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})
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It("should surface a failure condition on a common issue like exceeded quota", func() {
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rsConditionCheck(f)
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})
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})
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// A basic test to check the deployment of an image using a ReplicaSet. The
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// image serves its hostname which is checked for each replica.
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func ReplicaSetServeImageOrFail(f *framework.Framework, test string, image string) {
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name := "my-hostname-" + test + "-" + string(uuid.NewUUID())
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replicas := int32(2)
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// Create a ReplicaSet for a service that serves its hostname.
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// The source for the Docker containter kubernetes/serve_hostname is
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// in contrib/for-demos/serve_hostname
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By(fmt.Sprintf("Creating ReplicaSet %s", name))
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rs, err := f.ClientSet.Extensions().ReplicaSets(f.Namespace.Name).Create(&extensions.ReplicaSet{
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ObjectMeta: metav1.ObjectMeta{
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Name: name,
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},
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Spec: extensions.ReplicaSetSpec{
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Replicas: func(i int32) *int32 { return &i }(replicas),
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Selector: &metav1.LabelSelector{MatchLabels: map[string]string{
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"name": name,
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}},
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Template: v1.PodTemplateSpec{
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ObjectMeta: metav1.ObjectMeta{
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Labels: map[string]string{"name": name},
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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: name,
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Image: image,
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Ports: []v1.ContainerPort{{ContainerPort: 9376}},
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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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Expect(err).NotTo(HaveOccurred())
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// Cleanup the ReplicaSet when we are done.
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defer func() {
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// Resize the ReplicaSet to zero to get rid of pods.
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if err := framework.DeleteReplicaSet(f.ClientSet, f.InternalClientset, f.Namespace.Name, rs.Name); err != nil {
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framework.Logf("Failed to cleanup ReplicaSet %v: %v.", rs.Name, err)
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}
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}()
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// List the pods, making sure we observe all the replicas.
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label := labels.SelectorFromSet(labels.Set(map[string]string{"name": name}))
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pods, err := framework.PodsCreated(f.ClientSet, f.Namespace.Name, name, replicas)
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Expect(err).NotTo(HaveOccurred())
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By("Ensuring each pod is running")
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// Wait for the pods to enter the running state. Waiting loops until the pods
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// are running so non-running pods cause a timeout for this test.
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for _, pod := range pods.Items {
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if pod.DeletionTimestamp != nil {
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continue
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}
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err = f.WaitForPodRunning(pod.Name)
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Expect(err).NotTo(HaveOccurred())
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}
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// Verify that something is listening.
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By("Trying to dial each unique pod")
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retryTimeout := 2 * time.Minute
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retryInterval := 5 * time.Second
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err = wait.Poll(retryInterval, retryTimeout, framework.PodProxyResponseChecker(f.ClientSet, f.Namespace.Name, label, name, true, pods).CheckAllResponses)
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if err != nil {
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framework.Failf("Did not get expected responses within the timeout period of %.2f seconds.", retryTimeout.Seconds())
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}
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}
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// 1. Create a quota restricting pods in the current namespace to 2.
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// 2. Create a replica set that wants to run 3 pods.
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// 3. Check replica set conditions for a ReplicaFailure condition.
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// 4. Scale down the replica set and observe the condition is gone.
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func rsConditionCheck(f *framework.Framework) {
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c := f.ClientSet
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namespace := f.Namespace.Name
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name := "condition-test"
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By(fmt.Sprintf("Creating quota %q that allows only two pods to run in the current namespace", name))
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quota := newPodQuota(name, "2")
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_, err := c.Core().ResourceQuotas(namespace).Create(quota)
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Expect(err).NotTo(HaveOccurred())
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err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
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quota, err = c.Core().ResourceQuotas(namespace).Get(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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quantity := resource.MustParse("2")
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podQuota := quota.Status.Hard[v1.ResourcePods]
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return (&podQuota).Cmp(quantity) == 0, nil
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})
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if err == wait.ErrWaitTimeout {
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err = fmt.Errorf("resource quota %q never synced", name)
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}
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Expect(err).NotTo(HaveOccurred())
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By(fmt.Sprintf("Creating replica set %q that asks for more than the allowed pod quota", name))
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rs := newRS(name, 3, map[string]string{"name": name}, nginxImageName, nginxImage)
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rs, err = c.Extensions().ReplicaSets(namespace).Create(rs)
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Expect(err).NotTo(HaveOccurred())
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By(fmt.Sprintf("Checking replica set %q has the desired failure condition set", name))
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generation := rs.Generation
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conditions := rs.Status.Conditions
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err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
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rs, err = c.Extensions().ReplicaSets(namespace).Get(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 generation > rs.Status.ObservedGeneration {
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return false, nil
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}
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conditions = rs.Status.Conditions
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cond := replicaset.GetCondition(rs.Status, extensions.ReplicaSetReplicaFailure)
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return cond != nil, nil
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})
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if err == wait.ErrWaitTimeout {
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err = fmt.Errorf("rs controller never added the failure condition for replica set %q: %#v", name, conditions)
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}
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Expect(err).NotTo(HaveOccurred())
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By(fmt.Sprintf("Scaling down replica set %q to satisfy pod quota", name))
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rs, err = framework.UpdateReplicaSetWithRetries(c, namespace, name, func(update *extensions.ReplicaSet) {
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x := int32(2)
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update.Spec.Replicas = &x
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})
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Expect(err).NotTo(HaveOccurred())
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By(fmt.Sprintf("Checking replica set %q has no failure condition set", name))
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generation = rs.Generation
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conditions = rs.Status.Conditions
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err = wait.PollImmediate(1*time.Second, 1*time.Minute, func() (bool, error) {
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rs, err = c.Extensions().ReplicaSets(namespace).Get(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 generation > rs.Status.ObservedGeneration {
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return false, nil
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}
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conditions = rs.Status.Conditions
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cond := replicaset.GetCondition(rs.Status, extensions.ReplicaSetReplicaFailure)
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return cond == nil, nil
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})
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if err == wait.ErrWaitTimeout {
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err = fmt.Errorf("rs controller never removed the failure condition for rs %q: %#v", name, conditions)
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}
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Expect(err).NotTo(HaveOccurred())
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}
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