408 lines
13 KiB
Go
408 lines
13 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 common
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import (
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"fmt"
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"strconv"
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"time"
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"k8s.io/apimachinery/pkg/watch"
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"k8s.io/kubernetes/pkg/api/resource"
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"k8s.io/kubernetes/pkg/api/v1"
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podutil "k8s.io/kubernetes/pkg/api/v1/pod"
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"k8s.io/kubernetes/pkg/client/conditions"
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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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var _ = framework.KubeDescribe("InitContainer", func() {
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f := framework.NewDefaultFramework("init-container")
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var podClient *framework.PodClient
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BeforeEach(func() {
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podClient = f.PodClient()
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})
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It("should invoke init containers on a RestartNever pod", func() {
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framework.SkipIfContainerRuntimeIs("rkt") // #25988
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By("creating the pod")
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name := "pod-init-" + string(uuid.NewUUID())
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value := strconv.Itoa(time.Now().Nanosecond())
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pod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"name": "foo",
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"time": value,
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},
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},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyNever,
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InitContainers: []v1.Container{
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{
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Name: "init1",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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},
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{
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Name: "init2",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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},
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},
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Containers: []v1.Container{
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{
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Name: "run1",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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},
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},
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},
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}
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if err := podutil.SetInitContainersAnnotations(pod); err != nil {
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Expect(err).To(BeNil())
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}
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startedPod := podClient.Create(pod)
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w, err := podClient.Watch(v1.SingleObject(startedPod.ObjectMeta))
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Expect(err).NotTo(HaveOccurred(), "error watching a pod")
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wr := watch.NewRecorder(w)
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event, err := watch.Until(framework.PodStartTimeout, wr, conditions.PodCompleted)
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Expect(err).To(BeNil())
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framework.CheckInvariants(wr.Events(), framework.ContainerInitInvariant)
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endPod := event.Object.(*v1.Pod)
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if err := podutil.SetInitContainersAndStatuses(endPod); err != nil {
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Expect(err).To(BeNil())
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}
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Expect(endPod.Status.Phase).To(Equal(v1.PodSucceeded))
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_, init := v1.GetPodCondition(&endPod.Status, v1.PodInitialized)
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Expect(init).NotTo(BeNil())
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Expect(init.Status).To(Equal(v1.ConditionTrue))
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Expect(len(endPod.Status.InitContainerStatuses)).To(Equal(2))
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for _, status := range endPod.Status.InitContainerStatuses {
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Expect(status.Ready).To(BeTrue())
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Expect(status.State.Terminated).NotTo(BeNil())
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Expect(status.State.Terminated.ExitCode).To(BeZero())
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}
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})
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It("should invoke init containers on a RestartAlways pod", func() {
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framework.SkipIfContainerRuntimeIs("rkt") // #25988
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By("creating the pod")
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name := "pod-init-" + string(uuid.NewUUID())
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value := strconv.Itoa(time.Now().Nanosecond())
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pod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"name": "foo",
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"time": value,
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},
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},
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Spec: v1.PodSpec{
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InitContainers: []v1.Container{
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{
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Name: "init1",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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},
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{
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Name: "init2",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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},
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},
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Containers: []v1.Container{
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{
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Name: "run1",
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Image: framework.GetPauseImageName(f.ClientSet),
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Resources: v1.ResourceRequirements{
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Limits: v1.ResourceList{
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v1.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
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v1.ResourceMemory: *resource.NewQuantity(30*1024*1024, resource.DecimalSI),
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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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if err := podutil.SetInitContainersAnnotations(pod); err != nil {
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Expect(err).To(BeNil())
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}
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startedPod := podClient.Create(pod)
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w, err := podClient.Watch(v1.SingleObject(startedPod.ObjectMeta))
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Expect(err).NotTo(HaveOccurred(), "error watching a pod")
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wr := watch.NewRecorder(w)
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event, err := watch.Until(framework.PodStartTimeout, wr, conditions.PodRunning)
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Expect(err).To(BeNil())
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framework.CheckInvariants(wr.Events(), framework.ContainerInitInvariant)
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endPod := event.Object.(*v1.Pod)
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Expect(endPod.Status.Phase).To(Equal(v1.PodRunning))
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_, init := v1.GetPodCondition(&endPod.Status, v1.PodInitialized)
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Expect(init).NotTo(BeNil())
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Expect(init.Status).To(Equal(v1.ConditionTrue))
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if err := podutil.SetInitContainersAndStatuses(endPod); err != nil {
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Expect(err).To(BeNil())
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}
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Expect(len(endPod.Status.InitContainerStatuses)).To(Equal(2))
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for _, status := range endPod.Status.InitContainerStatuses {
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Expect(status.Ready).To(BeTrue())
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Expect(status.State.Terminated).NotTo(BeNil())
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Expect(status.State.Terminated.ExitCode).To(BeZero())
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}
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})
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It("should not start app containers if init containers fail on a RestartAlways pod", func() {
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framework.SkipIfContainerRuntimeIs("rkt") // #25988
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By("creating the pod")
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name := "pod-init-" + string(uuid.NewUUID())
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value := strconv.Itoa(time.Now().Nanosecond())
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pod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"name": "foo",
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"time": value,
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},
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},
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Spec: v1.PodSpec{
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InitContainers: []v1.Container{
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{
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Name: "init1",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/false"},
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},
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{
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Name: "init2",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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},
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},
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Containers: []v1.Container{
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{
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Name: "run1",
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Image: framework.GetPauseImageName(f.ClientSet),
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Resources: v1.ResourceRequirements{
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Limits: v1.ResourceList{
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v1.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
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v1.ResourceMemory: *resource.NewQuantity(30*1024*1024, resource.DecimalSI),
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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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if err := podutil.SetInitContainersAnnotations(pod); err != nil {
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Expect(err).To(BeNil())
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}
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startedPod := podClient.Create(pod)
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w, err := podClient.Watch(v1.SingleObject(startedPod.ObjectMeta))
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Expect(err).NotTo(HaveOccurred(), "error watching a pod")
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wr := watch.NewRecorder(w)
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event, err := watch.Until(
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framework.PodStartTimeout, wr,
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// check for the first container to fail at least once
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func(evt watch.Event) (bool, error) {
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switch t := evt.Object.(type) {
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case *v1.Pod:
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if err := podutil.SetInitContainersAndStatuses(t); err != nil {
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Expect(err).To(BeNil())
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}
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for _, status := range t.Status.ContainerStatuses {
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if status.State.Waiting == nil {
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return false, fmt.Errorf("container %q should not be out of waiting: %#v", status.Name, status)
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}
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if status.State.Waiting.Reason != "PodInitializing" {
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return false, fmt.Errorf("container %q should have reason PodInitializing: %#v", status.Name, status)
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}
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}
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if len(t.Status.InitContainerStatuses) != 2 {
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return false, nil
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}
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status := t.Status.InitContainerStatuses[1]
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if status.State.Waiting == nil {
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return false, fmt.Errorf("second init container should not be out of waiting: %#v", status)
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}
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if status.State.Waiting.Reason != "PodInitializing" {
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return false, fmt.Errorf("second init container should have reason PodInitializing: %#v", status)
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}
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status = t.Status.InitContainerStatuses[0]
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if status.State.Terminated != nil && status.State.Terminated.ExitCode == 0 {
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return false, fmt.Errorf("first init container should have exitCode != 0: %#v", status)
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}
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// continue until we see an attempt to restart the pod
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return status.LastTerminationState.Terminated != nil, nil
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default:
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return false, fmt.Errorf("unexpected object: %#v", t)
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}
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},
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// verify we get two restarts
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func(evt watch.Event) (bool, error) {
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switch t := evt.Object.(type) {
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case *v1.Pod:
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if err := podutil.SetInitContainersAndStatuses(t); err != nil {
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Expect(err).To(BeNil())
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}
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status := t.Status.InitContainerStatuses[0]
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if status.RestartCount < 3 {
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return false, nil
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}
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framework.Logf("init container has failed twice: %#v", t)
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// TODO: more conditions
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return true, nil
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default:
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return false, fmt.Errorf("unexpected object: %#v", t)
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}
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},
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)
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Expect(err).To(BeNil())
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framework.CheckInvariants(wr.Events(), framework.ContainerInitInvariant)
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endPod := event.Object.(*v1.Pod)
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if err := podutil.SetInitContainersAndStatuses(endPod); err != nil {
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Expect(err).To(BeNil())
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}
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Expect(endPod.Status.Phase).To(Equal(v1.PodPending))
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_, init := v1.GetPodCondition(&endPod.Status, v1.PodInitialized)
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Expect(init).NotTo(BeNil())
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Expect(init.Status).To(Equal(v1.ConditionFalse))
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Expect(init.Reason).To(Equal("ContainersNotInitialized"))
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Expect(init.Message).To(Equal("containers with incomplete status: [init1 init2]"))
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Expect(len(endPod.Status.InitContainerStatuses)).To(Equal(2))
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})
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It("should not start app containers and fail the pod if init containers fail on a RestartNever pod", func() {
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framework.SkipIfContainerRuntimeIs("rkt") // #25988
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By("creating the pod")
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name := "pod-init-" + string(uuid.NewUUID())
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value := strconv.Itoa(time.Now().Nanosecond())
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pod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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Name: name,
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Labels: map[string]string{
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"name": "foo",
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"time": value,
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},
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},
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Spec: v1.PodSpec{
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RestartPolicy: v1.RestartPolicyNever,
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InitContainers: []v1.Container{
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{
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Name: "init1",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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},
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{
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Name: "init2",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/false"},
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},
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},
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Containers: []v1.Container{
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{
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Name: "run1",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/true"},
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Resources: v1.ResourceRequirements{
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Limits: v1.ResourceList{
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v1.ResourceCPU: *resource.NewMilliQuantity(100, resource.DecimalSI),
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v1.ResourceMemory: *resource.NewQuantity(30*1024*1024, resource.DecimalSI),
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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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if err := podutil.SetInitContainersAnnotations(pod); err != nil {
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Expect(err).To(BeNil())
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}
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startedPod := podClient.Create(pod)
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w, err := podClient.Watch(v1.SingleObject(startedPod.ObjectMeta))
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Expect(err).NotTo(HaveOccurred(), "error watching a pod")
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wr := watch.NewRecorder(w)
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event, err := watch.Until(
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framework.PodStartTimeout, wr,
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// check for the second container to fail at least once
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func(evt watch.Event) (bool, error) {
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switch t := evt.Object.(type) {
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case *v1.Pod:
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if err := podutil.SetInitContainersAndStatuses(t); err != nil {
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Expect(err).To(BeNil())
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}
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for _, status := range t.Status.ContainerStatuses {
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if status.State.Waiting == nil {
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return false, fmt.Errorf("container %q should not be out of waiting: %#v", status.Name, status)
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}
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if status.State.Waiting.Reason != "PodInitializing" {
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return false, fmt.Errorf("container %q should have reason PodInitializing: %#v", status.Name, status)
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}
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}
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if len(t.Status.InitContainerStatuses) != 2 {
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return false, nil
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}
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status := t.Status.InitContainerStatuses[0]
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if status.State.Terminated == nil {
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if status.State.Waiting != nil && status.State.Waiting.Reason != "PodInitializing" {
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return false, fmt.Errorf("second init container should have reason PodInitializing: %#v", status)
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}
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return false, nil
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}
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if status.State.Terminated != nil && status.State.Terminated.ExitCode != 0 {
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return false, fmt.Errorf("first init container should have exitCode != 0: %#v", status)
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}
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status = t.Status.InitContainerStatuses[1]
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if status.State.Terminated == nil {
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return false, nil
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}
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if status.State.Terminated.ExitCode == 0 {
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return false, fmt.Errorf("second init container should have failed: %#v", status)
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}
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return true, nil
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default:
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return false, fmt.Errorf("unexpected object: %#v", t)
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}
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},
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conditions.PodCompleted,
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)
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Expect(err).To(BeNil())
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framework.CheckInvariants(wr.Events(), framework.ContainerInitInvariant)
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endPod := event.Object.(*v1.Pod)
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Expect(endPod.Status.Phase).To(Equal(v1.PodFailed))
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_, init := v1.GetPodCondition(&endPod.Status, v1.PodInitialized)
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Expect(init).NotTo(BeNil())
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Expect(init.Status).To(Equal(v1.ConditionFalse))
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Expect(init.Reason).To(Equal("ContainersNotInitialized"))
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Expect(init.Message).To(Equal("containers with incomplete status: [init2]"))
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Expect(len(endPod.Status.InitContainerStatuses)).To(Equal(2))
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Expect(endPod.Status.ContainerStatuses[0].State.Waiting).ToNot(BeNil())
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})
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})
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