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container_lifecycle_test.go
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container_lifecycle_test.go
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/*
Copyright 2023 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package e2enode
import (
"context"
"fmt"
"time"
"github.com/onsi/ginkgo/v2"
"github.com/onsi/gomega"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
runtimeapi "k8s.io/cri-api/pkg/apis/runtime/v1"
admissionapi "k8s.io/pod-security-admission/api"
"k8s.io/kubernetes/test/e2e/framework"
e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
"k8s.io/kubernetes/test/e2e/nodefeature"
imageutils "k8s.io/kubernetes/test/utils/image"
"k8s.io/utils/ptr"
)
const (
LivenessPrefix = "Liveness"
PostStartPrefix = "PostStart"
PreStopPrefix = "PreStop"
ReadinessPrefix = "Readiness"
StartupPrefix = "Startup"
)
var containerRestartPolicyAlways = v1.ContainerRestartPolicyAlways
func prefixedName(namePrefix string, name string) string {
return fmt.Sprintf("%s-%s", namePrefix, name)
}
var _ = SIGDescribe(framework.WithNodeConformance(), "Containers Lifecycle", func() {
f := framework.NewDefaultFramework("containers-lifecycle-test")
f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
ginkgo.It("should launch init container serially before a regular container", func() {
init1 := "init-1"
init2 := "init-2"
init3 := "init-3"
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "initcontainer-test-pod",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
InitContainers: []v1.Container{
{
Name: init1,
Image: busyboxImage,
Command: ExecCommand(init1, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
{
Name: init2,
Image: busyboxImage,
Command: ExecCommand(init2, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
{
Name: init3,
Image: busyboxImage,
Command: ExecCommand(init3, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
},
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
StartDelay: 5,
Delay: 1,
ExitCode: 0,
}),
StartupProbe: &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: []string{
"test",
"-f",
"started",
},
},
},
},
},
},
},
}
preparePod(podSpec)
/// generates an out file output like:
//
// 1682076093 4905.79 init-1 Starting 0
// 1682076093 4905.80 init-1 Started
// 1682076093 4905.80 init-1 Delaying 1
// 1682076094 4906.80 init-1 Exiting
// 1682076095 4907.70 init-2 Starting 0
// 1682076095 4907.71 init-2 Started
// 1682076095 4907.71 init-2 Delaying 1
// 1682076096 4908.71 init-2 Exiting
// 1682076097 4909.74 init-3 Starting 0
// 1682076097 4909.74 init-3 Started
// 1682076097 4909.74 init-3 Delaying 1
// 1682076098 4910.75 init-3 Exiting
// 1682076099 4911.70 regular-1 Starting 5
// 1682076104 4916.71 regular-1 Started
// 1682076104 4916.71 regular-1 Delaying 1
// 1682076105 4917.72 regular-1 Exiting
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to finish")
err := e2epod.WaitTimeoutForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace, 1*time.Minute)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.Background(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
// which we then use to make assertions regarding container ordering
ginkgo.By("Analyzing results")
framework.ExpectNoError(results.StartsBefore(init1, init2))
framework.ExpectNoError(results.ExitsBefore(init1, init2))
framework.ExpectNoError(results.StartsBefore(init2, init3))
framework.ExpectNoError(results.ExitsBefore(init2, init3))
framework.ExpectNoError(results.StartsBefore(init3, regular1))
framework.ExpectNoError(results.ExitsBefore(init3, regular1))
})
ginkgo.It("should not launch regular containers if an init container fails", func() {
init1 := "init-1"
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "initcontainer-test-pod-failure",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
InitContainers: []v1.Container{
{
Name: init1,
Image: busyboxImage,
Command: ExecCommand(init1, execCommand{
Delay: 1,
ExitCode: 1,
}),
},
},
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
},
},
}
preparePod(podSpec)
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to fail")
err := e2epod.WaitForPodFailedReason(context.TODO(), f.ClientSet, podSpec, "", 1*time.Minute)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.Background(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// init container should start and exit with an error, and the regular container should never start
framework.ExpectNoError(results.Starts(init1))
framework.ExpectNoError(results.Exits(init1))
framework.ExpectNoError(results.DoesntStart(regular1))
})
ginkgo.It("should run Init container to completion before call to PostStart of regular container", func() {
init1 := "init-1"
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "initcontainer-test-pod-with-post-start",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
InitContainers: []v1.Container{
{
Name: init1,
Image: busyboxImage,
Command: ExecCommand(init1, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
},
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
// Allocate sufficient time for its postStart hook
// to complete.
// Note that we've observed approximately a 2s
// delay before the postStart hook is called.
// 10s > 1s + 2s(estimated maximum delay) + other possible delays
Delay: 10,
ExitCode: 0,
}),
Lifecycle: &v1.Lifecycle{
PostStart: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PostStartPrefix, regular1), execCommand{
Delay: 1,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
},
},
},
},
}
preparePod(podSpec)
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to finish")
err := e2epod.WaitTimeoutForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace, 1*time.Minute)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.Background(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// init container should start and exit with an error, and the regular container should never start
framework.ExpectNoError(results.StartsBefore(init1, prefixedName(PostStartPrefix, regular1)))
framework.ExpectNoError(results.ExitsBefore(init1, prefixedName(PostStartPrefix, regular1)))
framework.ExpectNoError(results.RunTogether(regular1, prefixedName(PostStartPrefix, regular1)))
})
ginkgo.It("should restart failing container when pod restartPolicy is Always", func() {
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "container-must-be-restarted",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyAlways,
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
Delay: 1,
ExitCode: 1,
}),
},
},
},
}
preparePod(podSpec)
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod, it will not finish")
err := WaitForPodContainerRestartCount(context.TODO(), f.ClientSet, podSpec.Namespace, podSpec.Name, 0, 3, 2*time.Minute)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.Background(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// container must be restarted
framework.ExpectNoError(results.Starts(regular1))
framework.ExpectNoError(results.StartsBefore(regular1, regular1))
framework.ExpectNoError(results.ExitsBefore(regular1, regular1))
})
ginkgo.It("should not launch second container before PostStart of the first container completed", func() {
regular1 := "regular-1"
regular2 := "regular-2"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "post-start-blocks-second-container",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
// Allocate sufficient time for its postStart hook
// to complete.
// Note that we've observed approximately a 2s
// delay before the postStart hook is called.
// 10s > 1s + 2s(estimated maximum delay) + other possible delays
Delay: 10,
ExitCode: 0,
}),
Lifecycle: &v1.Lifecycle{
PostStart: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PostStartPrefix, regular1), execCommand{
Delay: 1,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
},
},
{
Name: regular2,
Image: busyboxImage,
Command: ExecCommand(regular2, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
},
},
}
preparePod(podSpec)
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to finish")
err := e2epod.WaitTimeoutForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace, 1*time.Minute)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.Background(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// second container should not start before the PostStart of a first container completed
framework.ExpectNoError(results.StartsBefore(prefixedName(PostStartPrefix, regular1), regular2))
framework.ExpectNoError(results.ExitsBefore(prefixedName(PostStartPrefix, regular1), regular2))
})
ginkgo.When("have init container in a Pod with restartPolicy=Never", func() {
ginkgo.When("an init container fails to start because of a bad image", ginkgo.Ordered, func() {
init1 := "init1-1"
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "bad-image",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
InitContainers: []v1.Container{
{
Name: init1,
Image: imageutils.GetE2EImage(imageutils.InvalidRegistryImage),
Command: ExecCommand(init1, execCommand{
Delay: 600,
ExitCode: 0,
}),
},
},
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
},
},
}
preparePod(podSpec)
var results containerOutputList
ginkgo.It("should mark a Pod as failed and produce log", func() {
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
err := WaitForPodInitContainerToFail(context.TODO(), f.ClientSet, podSpec.Namespace, podSpec.Name, 0, "ImagePullBackOff", f.Timeouts.PodStart)
framework.ExpectNoError(err)
podSpec, err = client.Get(context.Background(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results = parseOutput(context.TODO(), f, podSpec)
})
ginkgo.It("should not start an init container", func() {
framework.ExpectNoError(results.DoesntStart(init1))
})
ginkgo.It("should not start a regular container", func() {
framework.ExpectNoError(results.DoesntStart(regular1))
})
})
})
ginkgo.It("shouldn't restart init containers upon regular container restart", func() {
init1 := "init-1"
init2 := "init-2"
init3 := "init-3"
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "initcontainer-test-pod",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyAlways,
InitContainers: []v1.Container{
{
Name: init1,
Image: busyboxImage,
Command: ExecCommand(init1, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
{
Name: init2,
Image: busyboxImage,
Command: ExecCommand(init2, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
{
Name: init3,
Image: busyboxImage,
Command: ExecCommand(init3, execCommand{
Delay: 1,
ExitCode: 0,
}),
},
},
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
Delay: 10,
ExitCode: -1,
}),
},
},
},
}
preparePod(podSpec)
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to restart a few times")
err := WaitForPodContainerRestartCount(context.TODO(), f.ClientSet, podSpec.Namespace, podSpec.Name, 0, 3, 2*time.Minute)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.Background(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
framework.ExpectNoError(results.StartsBefore(init1, init2))
framework.ExpectNoError(results.ExitsBefore(init1, init2))
framework.ExpectNoError(results.StartsBefore(init2, init3))
framework.ExpectNoError(results.ExitsBefore(init2, init3))
framework.ExpectNoError(results.StartsBefore(init3, regular1))
framework.ExpectNoError(results.ExitsBefore(init3, regular1))
// ensure that the init containers never restarted
framework.ExpectNoError(results.HasNotRestarted(init1))
framework.ExpectNoError(results.HasNotRestarted(init2))
framework.ExpectNoError(results.HasNotRestarted(init3))
// while the regular container did
framework.ExpectNoError(results.HasRestarted(regular1))
})
ginkgo.When("a pod cannot terminate gracefully", func() {
testPod := func(name string, gracePeriod int64) *v1.Pod {
return &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: name,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "busybox",
Image: imageutils.GetE2EImage(imageutils.BusyBox),
Command: []string{
"sleep",
"10000",
},
},
},
TerminationGracePeriodSeconds: &gracePeriod,
},
}
}
// To account for the time it takes to delete the pod, we add a buffer. Its sized
// so that we allow up to 2x the grace time to delete the pod. Its extra large to
// reduce test flakes.
bufferSeconds := int64(30)
f.It("should respect termination grace period seconds", f.WithNodeConformance(), func() {
client := e2epod.NewPodClient(f)
gracePeriod := int64(30)
ginkgo.By("creating a pod with a termination grace period seconds")
pod := testPod("pod-termination-grace-period", gracePeriod)
pod = client.Create(context.TODO(), pod)
ginkgo.By("ensuring the pod is running")
err := e2epod.WaitForPodRunningInNamespace(context.TODO(), f.ClientSet, pod)
framework.ExpectNoError(err)
ginkgo.By("deleting the pod gracefully")
err = client.Delete(context.TODO(), pod.Name, metav1.DeleteOptions{})
framework.ExpectNoError(err)
ginkgo.By("ensuring the pod is terminated within the grace period seconds + buffer seconds")
err = e2epod.WaitForPodNotFoundInNamespace(context.TODO(), f.ClientSet, pod.Name, pod.Namespace, time.Duration(gracePeriod+bufferSeconds)*time.Second)
framework.ExpectNoError(err)
})
f.It("should respect termination grace period seconds with long-running preStop hook", f.WithNodeConformance(), func() {
client := e2epod.NewPodClient(f)
gracePeriod := int64(30)
ginkgo.By("creating a pod with a termination grace period seconds and long-running preStop hook")
pod := testPod("pod-termination-grace-period", gracePeriod)
pod.Spec.Containers[0].Lifecycle = &v1.Lifecycle{
PreStop: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: []string{
"sleep",
"10000",
},
},
},
}
pod = client.Create(context.TODO(), pod)
ginkgo.By("ensuring the pod is running")
err := e2epod.WaitForPodRunningInNamespace(context.TODO(), f.ClientSet, pod)
framework.ExpectNoError(err)
ginkgo.By("deleting the pod gracefully")
err = client.Delete(context.TODO(), pod.Name, metav1.DeleteOptions{})
framework.ExpectNoError(err)
ginkgo.By("ensuring the pod is terminated within the grace period seconds + buffer seconds")
err = e2epod.WaitForPodNotFoundInNamespace(context.TODO(), f.ClientSet, pod.Name, pod.Namespace, time.Duration(gracePeriod+bufferSeconds)*time.Second)
framework.ExpectNoError(err)
})
})
ginkgo.It("should call the container's preStop hook and terminate it if its startup probe fails", func() {
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "test-pod",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
Delay: 100,
TerminationSeconds: 15,
ExitCode: 0,
}),
StartupProbe: &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: []string{
"sh",
"-c",
"exit 1",
},
},
},
InitialDelaySeconds: 10,
FailureThreshold: 1,
},
Lifecycle: &v1.Lifecycle{
PreStop: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PreStopPrefix, regular1), execCommand{
Delay: 1,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
},
},
},
},
}
preparePod(podSpec)
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to complete")
err := e2epod.WaitForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.TODO(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
framework.ExpectNoError(results.RunTogether(regular1, prefixedName(PreStopPrefix, regular1)))
framework.ExpectNoError(results.Starts(prefixedName(PreStopPrefix, regular1)))
framework.ExpectNoError(results.Exits(regular1))
})
ginkgo.It("should call the container's preStop hook and terminate it if its liveness probe fails", func() {
regular1 := "regular-1"
podSpec := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "test-pod",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
Delay: 100,
TerminationSeconds: 15,
ExitCode: 0,
}),
LivenessProbe: &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: []string{
"sh",
"-c",
"exit 1",
},
},
},
InitialDelaySeconds: 10,
FailureThreshold: 1,
},
Lifecycle: &v1.Lifecycle{
PreStop: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PreStopPrefix, regular1), execCommand{
Delay: 1,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
},
},
},
},
}
preparePod(podSpec)
client := e2epod.NewPodClient(f)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to complete")
err := e2epod.WaitForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.TODO(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
framework.ExpectNoError(results.RunTogether(regular1, prefixedName(PreStopPrefix, regular1)))
framework.ExpectNoError(results.Starts(prefixedName(PreStopPrefix, regular1)))
framework.ExpectNoError(results.Exits(regular1))
})
ginkgo.When("a pod is terminating because its liveness probe fails", func() {
regular1 := "regular-1"
testPod := func() *v1.Pod {
return &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "test-pod",
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyNever,
TerminationGracePeriodSeconds: ptr.To(int64(100)),
Containers: []v1.Container{
{
Name: regular1,
Image: imageutils.GetE2EImage(imageutils.BusyBox),
Command: ExecCommand(regular1, execCommand{
Delay: 100,
TerminationSeconds: 15,
ExitCode: 0,
}),
LivenessProbe: &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(LivenessPrefix, regular1), execCommand{
ExitCode: 1,
ContainerName: regular1,
}),
},
},
InitialDelaySeconds: 10,
PeriodSeconds: 1,
FailureThreshold: 1,
},
},
},
},
}
}
f.It("should execute readiness probe while in preStop, but not liveness", f.WithNodeConformance(), func() {
client := e2epod.NewPodClient(f)
podSpec := testPod()
ginkgo.By("creating a pod with a readiness probe and a preStop hook")
podSpec.Spec.Containers[0].Lifecycle = &v1.Lifecycle{
PreStop: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PreStopPrefix, regular1), execCommand{
Delay: 1,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
}
podSpec.Spec.Containers[0].ReadinessProbe = &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(ReadinessPrefix, regular1), execCommand{
ExitCode: 0,
ContainerName: regular1,
}),
},
},
InitialDelaySeconds: 1,
PeriodSeconds: 1,
}
preparePod(podSpec)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to complete")
err := e2epod.WaitForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.TODO(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// readiness probes are called during pod termination
framework.ExpectNoError(results.RunTogether(prefixedName(PreStopPrefix, regular1), prefixedName(ReadinessPrefix, regular1)))
// liveness probes are not called during pod termination
err = results.RunTogether(prefixedName(PreStopPrefix, regular1), prefixedName(LivenessPrefix, regular1))
gomega.Expect(err).To(gomega.HaveOccurred())
})
f.It("should continue running liveness probes for restartable init containers and restart them while in preStop", f.WithNodeConformance(), func() {
client := e2epod.NewPodClient(f)
podSpec := testPod()
restartableInit1 := "restartable-init-1"
ginkgo.By("creating a pod with a restartable init container and a preStop hook")
podSpec.Spec.InitContainers = []v1.Container{{
RestartPolicy: &containerRestartPolicyAlways,
Name: restartableInit1,
Image: imageutils.GetE2EImage(imageutils.BusyBox),
Command: ExecCommand(restartableInit1, execCommand{
Delay: 100,
TerminationSeconds: 1,
ExitCode: 0,
}),
LivenessProbe: &v1.Probe{
ProbeHandler: v1.ProbeHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(LivenessPrefix, restartableInit1), execCommand{
ExitCode: 1,
ContainerName: restartableInit1,
}),
},
},
InitialDelaySeconds: 1,
PeriodSeconds: 1,
FailureThreshold: 1,
},
}}
podSpec.Spec.Containers[0].Lifecycle = &v1.Lifecycle{
PreStop: &v1.LifecycleHandler{
Exec: &v1.ExecAction{
Command: ExecCommand(prefixedName(PreStopPrefix, regular1), execCommand{
Delay: 40,
ExitCode: 0,
ContainerName: regular1,
}),
},
},
}
preparePod(podSpec)
podSpec = client.Create(context.TODO(), podSpec)
ginkgo.By("Waiting for the pod to complete")
err := e2epod.WaitForPodNoLongerRunningInNamespace(context.TODO(), f.ClientSet, podSpec.Name, podSpec.Namespace)
framework.ExpectNoError(err)
ginkgo.By("Parsing results")
podSpec, err = client.Get(context.TODO(), podSpec.Name, metav1.GetOptions{})
framework.ExpectNoError(err)
results := parseOutput(context.TODO(), f, podSpec)
ginkgo.By("Analyzing results")
// FIXME ExpectNoError: this will be implemented in KEP 4438
// liveness probes are called for restartable init containers during pod termination
err = results.RunTogether(prefixedName(PreStopPrefix, regular1), prefixedName(LivenessPrefix, restartableInit1))
gomega.Expect(err).To(gomega.HaveOccurred())
// FIXME ExpectNoError: this will be implemented in KEP 4438
// restartable init containers are restarted during pod termination
err = results.RunTogether(prefixedName(PreStopPrefix, regular1), restartableInit1)
gomega.Expect(err).To(gomega.HaveOccurred())
})
})
})
var _ = SIGDescribe(framework.WithSerial(), "Containers Lifecycle", func() {
f := framework.NewDefaultFramework("containers-lifecycle-test-serial")
f.NamespacePodSecurityEnforceLevel = admissionapi.LevelPrivileged
ginkgo.It("should restart the containers in right order after the node reboot", func(ctx context.Context) {
init1 := "init-1"
init2 := "init-2"
init3 := "init-3"
regular1 := "regular-1"
podLabels := map[string]string{
"test": "containers-lifecycle-test-serial",
"namespace": f.Namespace.Name,
}
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "initialized-pod",
Labels: podLabels,
},
Spec: v1.PodSpec{
RestartPolicy: v1.RestartPolicyAlways,
InitContainers: []v1.Container{
{
Name: init1,
Image: busyboxImage,
Command: ExecCommand(init1, execCommand{
Delay: 5,
ExitCode: 0,
}),
},
{
Name: init2,
Image: busyboxImage,
Command: ExecCommand(init2, execCommand{
Delay: 5,
ExitCode: 0,
}),
},
{
Name: init3,
Image: busyboxImage,
Command: ExecCommand(init3, execCommand{
Delay: 5,
ExitCode: 0,
}),
},
},
Containers: []v1.Container{
{
Name: regular1,
Image: busyboxImage,
Command: ExecCommand(regular1, execCommand{
Delay: 30,
ExitCode: 0,
}),
},
},
},
}
preparePod(pod)
client := e2epod.NewPodClient(f)
pod = client.Create(ctx, pod)
ginkgo.By("Waiting for the pod to be initialized and run")
err := e2epod.WaitForPodRunningInNamespace(ctx, f.ClientSet, pod)
framework.ExpectNoError(err)
ginkgo.By("Getting the current pod sandbox ID")
rs, _, err := getCRIClient()
framework.ExpectNoError(err)
sandboxes, err := rs.ListPodSandbox(ctx, &runtimeapi.PodSandboxFilter{
LabelSelector: podLabels,
})
framework.ExpectNoError(err)
gomega.Expect(sandboxes).To(gomega.HaveLen(1))
podSandboxID := sandboxes[0].Id
ginkgo.By("Stopping the kubelet")
restartKubelet := stopKubelet()
gomega.Eventually(ctx, func() bool {
return kubeletHealthCheck(kubeletHealthCheckURL)
}, f.Timeouts.PodStart, f.Timeouts.Poll).Should(gomega.BeFalse())
ginkgo.By("Stopping the pod sandbox to simulate the node reboot")
err = rs.StopPodSandbox(ctx, podSandboxID)
framework.ExpectNoError(err)
ginkgo.By("Restarting the kubelet")
restartKubelet()
gomega.Eventually(ctx, func() bool {