661 lines
20 KiB
Go
661 lines
20 KiB
Go
/*
|
|
Copyright 2016 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 common
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"golang.org/x/net/websocket"
|
|
|
|
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
|
|
"k8s.io/apimachinery/pkg/labels"
|
|
"k8s.io/apimachinery/pkg/util/wait"
|
|
"k8s.io/apimachinery/pkg/watch"
|
|
"k8s.io/kubernetes/pkg/api/v1"
|
|
"k8s.io/kubernetes/pkg/kubelet"
|
|
"k8s.io/kubernetes/pkg/util/intstr"
|
|
"k8s.io/kubernetes/pkg/util/uuid"
|
|
"k8s.io/kubernetes/test/e2e/framework"
|
|
|
|
. "github.com/onsi/ginkgo"
|
|
. "github.com/onsi/gomega"
|
|
)
|
|
|
|
var (
|
|
buildBackOffDuration = time.Minute
|
|
syncLoopFrequency = 10 * time.Second
|
|
maxBackOffTolerance = time.Duration(1.3 * float64(kubelet.MaxContainerBackOff))
|
|
)
|
|
|
|
// testHostIP tests that a pod gets a host IP
|
|
func testHostIP(podClient *framework.PodClient, pod *v1.Pod) {
|
|
By("creating pod")
|
|
podClient.CreateSync(pod)
|
|
|
|
// Try to make sure we get a hostIP for each pod.
|
|
hostIPTimeout := 2 * time.Minute
|
|
t := time.Now()
|
|
for {
|
|
p, err := podClient.Get(pod.Name, metav1.GetOptions{})
|
|
Expect(err).NotTo(HaveOccurred(), "Failed to get pod %q", pod.Name)
|
|
if p.Status.HostIP != "" {
|
|
framework.Logf("Pod %s has hostIP: %s", p.Name, p.Status.HostIP)
|
|
break
|
|
}
|
|
if time.Since(t) >= hostIPTimeout {
|
|
framework.Failf("Gave up waiting for hostIP of pod %s after %v seconds",
|
|
p.Name, time.Since(t).Seconds())
|
|
}
|
|
framework.Logf("Retrying to get the hostIP of pod %s", p.Name)
|
|
time.Sleep(5 * time.Second)
|
|
}
|
|
}
|
|
|
|
func startPodAndGetBackOffs(podClient *framework.PodClient, pod *v1.Pod, sleepAmount time.Duration) (time.Duration, time.Duration) {
|
|
podClient.CreateSync(pod)
|
|
time.Sleep(sleepAmount)
|
|
Expect(pod.Spec.Containers).NotTo(BeEmpty())
|
|
podName := pod.Name
|
|
containerName := pod.Spec.Containers[0].Name
|
|
|
|
By("getting restart delay-0")
|
|
_, err := getRestartDelay(podClient, podName, containerName)
|
|
if err != nil {
|
|
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
|
|
}
|
|
|
|
By("getting restart delay-1")
|
|
delay1, err := getRestartDelay(podClient, podName, containerName)
|
|
if err != nil {
|
|
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
|
|
}
|
|
|
|
By("getting restart delay-2")
|
|
delay2, err := getRestartDelay(podClient, podName, containerName)
|
|
if err != nil {
|
|
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
|
|
}
|
|
return delay1, delay2
|
|
}
|
|
|
|
func getRestartDelay(podClient *framework.PodClient, podName string, containerName string) (time.Duration, error) {
|
|
beginTime := time.Now()
|
|
for time.Since(beginTime) < (2 * maxBackOffTolerance) { // may just miss the 1st MaxContainerBackOff delay
|
|
time.Sleep(time.Second)
|
|
pod, err := podClient.Get(podName, metav1.GetOptions{})
|
|
framework.ExpectNoError(err, fmt.Sprintf("getting pod %s", podName))
|
|
status, ok := v1.GetContainerStatus(pod.Status.ContainerStatuses, containerName)
|
|
if !ok {
|
|
framework.Logf("getRestartDelay: status missing")
|
|
continue
|
|
}
|
|
|
|
if status.State.Waiting == nil && status.State.Running != nil && status.LastTerminationState.Terminated != nil && status.State.Running.StartedAt.Time.After(beginTime) {
|
|
startedAt := status.State.Running.StartedAt.Time
|
|
finishedAt := status.LastTerminationState.Terminated.FinishedAt.Time
|
|
framework.Logf("getRestartDelay: restartCount = %d, finishedAt=%s restartedAt=%s (%s)", status.RestartCount, finishedAt, startedAt, startedAt.Sub(finishedAt))
|
|
return startedAt.Sub(finishedAt), nil
|
|
}
|
|
}
|
|
return 0, fmt.Errorf("timeout getting pod restart delay")
|
|
}
|
|
|
|
var _ = framework.KubeDescribe("Pods", func() {
|
|
f := framework.NewDefaultFramework("pods")
|
|
var podClient *framework.PodClient
|
|
BeforeEach(func() {
|
|
podClient = f.PodClient()
|
|
})
|
|
|
|
It("should get a host IP [Conformance]", func() {
|
|
name := "pod-hostip-" + string(uuid.NewUUID())
|
|
testHostIP(podClient, &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: name,
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "test",
|
|
Image: framework.GetPauseImageName(f.ClientSet),
|
|
},
|
|
},
|
|
},
|
|
})
|
|
})
|
|
|
|
It("should be submitted and removed [Conformance]", func() {
|
|
By("creating the pod")
|
|
name := "pod-submit-remove-" + string(uuid.NewUUID())
|
|
value := strconv.Itoa(time.Now().Nanosecond())
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: name,
|
|
Labels: map[string]string{
|
|
"name": "foo",
|
|
"time": value,
|
|
},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "nginx",
|
|
Image: "gcr.io/google_containers/nginx-slim:0.7",
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
By("setting up watch")
|
|
selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
|
|
options := metav1.ListOptions{LabelSelector: selector.String()}
|
|
pods, err := podClient.List(options)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
|
|
Expect(len(pods.Items)).To(Equal(0))
|
|
options = metav1.ListOptions{
|
|
LabelSelector: selector.String(),
|
|
ResourceVersion: pods.ListMeta.ResourceVersion,
|
|
}
|
|
w, err := podClient.Watch(options)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to set up watch")
|
|
|
|
By("submitting the pod to kubernetes")
|
|
podClient.Create(pod)
|
|
|
|
By("verifying the pod is in kubernetes")
|
|
selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
|
|
options = metav1.ListOptions{LabelSelector: selector.String()}
|
|
pods, err = podClient.List(options)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
|
|
Expect(len(pods.Items)).To(Equal(1))
|
|
|
|
By("verifying pod creation was observed")
|
|
select {
|
|
case event, _ := <-w.ResultChan():
|
|
if event.Type != watch.Added {
|
|
framework.Failf("Failed to observe pod creation: %v", event)
|
|
}
|
|
case <-time.After(framework.PodStartTimeout):
|
|
Fail("Timeout while waiting for pod creation")
|
|
}
|
|
|
|
// We need to wait for the pod to be running, otherwise the deletion
|
|
// may be carried out immediately rather than gracefully.
|
|
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
|
|
// save the running pod
|
|
pod, err = podClient.Get(pod.Name, metav1.GetOptions{})
|
|
Expect(err).NotTo(HaveOccurred(), "failed to GET scheduled pod")
|
|
framework.Logf("running pod: %#v", pod)
|
|
|
|
By("deleting the pod gracefully")
|
|
err = podClient.Delete(pod.Name, metav1.NewDeleteOptions(30))
|
|
Expect(err).NotTo(HaveOccurred(), "failed to delete pod")
|
|
|
|
By("verifying the kubelet observed the termination notice")
|
|
Expect(wait.Poll(time.Second*5, time.Second*30, func() (bool, error) {
|
|
podList, err := framework.GetKubeletPods(f.ClientSet, pod.Spec.NodeName)
|
|
if err != nil {
|
|
framework.Logf("Unable to retrieve kubelet pods for node %v: %v", pod.Spec.NodeName, err)
|
|
return false, nil
|
|
}
|
|
for _, kubeletPod := range podList.Items {
|
|
if pod.Name != kubeletPod.Name {
|
|
continue
|
|
}
|
|
if kubeletPod.ObjectMeta.DeletionTimestamp == nil {
|
|
framework.Logf("deletion has not yet been observed")
|
|
return false, nil
|
|
}
|
|
return true, nil
|
|
}
|
|
framework.Logf("no pod exists with the name we were looking for, assuming the termination request was observed and completed")
|
|
return true, nil
|
|
})).NotTo(HaveOccurred(), "kubelet never observed the termination notice")
|
|
|
|
By("verifying pod deletion was observed")
|
|
deleted := false
|
|
timeout := false
|
|
var lastPod *v1.Pod
|
|
timer := time.After(30 * time.Second)
|
|
for !deleted && !timeout {
|
|
select {
|
|
case event, _ := <-w.ResultChan():
|
|
if event.Type == watch.Deleted {
|
|
lastPod = event.Object.(*v1.Pod)
|
|
deleted = true
|
|
}
|
|
case <-timer:
|
|
timeout = true
|
|
}
|
|
}
|
|
if !deleted {
|
|
Fail("Failed to observe pod deletion")
|
|
}
|
|
|
|
Expect(lastPod.DeletionTimestamp).ToNot(BeNil())
|
|
Expect(lastPod.Spec.TerminationGracePeriodSeconds).ToNot(BeZero())
|
|
|
|
selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
|
|
options = metav1.ListOptions{LabelSelector: selector.String()}
|
|
pods, err = podClient.List(options)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
|
|
Expect(len(pods.Items)).To(Equal(0))
|
|
})
|
|
|
|
It("should be updated [Conformance]", func() {
|
|
By("creating the pod")
|
|
name := "pod-update-" + string(uuid.NewUUID())
|
|
value := strconv.Itoa(time.Now().Nanosecond())
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: name,
|
|
Labels: map[string]string{
|
|
"name": "foo",
|
|
"time": value,
|
|
},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "nginx",
|
|
Image: "gcr.io/google_containers/nginx-slim:0.7",
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
By("submitting the pod to kubernetes")
|
|
pod = podClient.CreateSync(pod)
|
|
|
|
By("verifying the pod is in kubernetes")
|
|
selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
|
|
options := metav1.ListOptions{LabelSelector: selector.String()}
|
|
pods, err := podClient.List(options)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
|
|
Expect(len(pods.Items)).To(Equal(1))
|
|
|
|
By("updating the pod")
|
|
podClient.Update(name, func(pod *v1.Pod) {
|
|
value = strconv.Itoa(time.Now().Nanosecond())
|
|
pod.Labels["time"] = value
|
|
})
|
|
|
|
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
|
|
|
|
By("verifying the updated pod is in kubernetes")
|
|
selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
|
|
options = metav1.ListOptions{LabelSelector: selector.String()}
|
|
pods, err = podClient.List(options)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
|
|
Expect(len(pods.Items)).To(Equal(1))
|
|
framework.Logf("Pod update OK")
|
|
})
|
|
|
|
It("should allow activeDeadlineSeconds to be updated [Conformance]", func() {
|
|
By("creating the pod")
|
|
name := "pod-update-activedeadlineseconds-" + string(uuid.NewUUID())
|
|
value := strconv.Itoa(time.Now().Nanosecond())
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: name,
|
|
Labels: map[string]string{
|
|
"name": "foo",
|
|
"time": value,
|
|
},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "nginx",
|
|
Image: "gcr.io/google_containers/nginx-slim:0.7",
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
By("submitting the pod to kubernetes")
|
|
podClient.CreateSync(pod)
|
|
|
|
By("verifying the pod is in kubernetes")
|
|
selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
|
|
options := metav1.ListOptions{LabelSelector: selector.String()}
|
|
pods, err := podClient.List(options)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
|
|
Expect(len(pods.Items)).To(Equal(1))
|
|
|
|
By("updating the pod")
|
|
podClient.Update(name, func(pod *v1.Pod) {
|
|
newDeadline := int64(5)
|
|
pod.Spec.ActiveDeadlineSeconds = &newDeadline
|
|
})
|
|
|
|
framework.ExpectNoError(f.WaitForPodTerminated(pod.Name, "DeadlineExceeded"))
|
|
})
|
|
|
|
It("should contain environment variables for services [Conformance]", func() {
|
|
// Make a pod that will be a service.
|
|
// This pod serves its hostname via HTTP.
|
|
serverName := "server-envvars-" + string(uuid.NewUUID())
|
|
serverPod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: serverName,
|
|
Labels: map[string]string{"name": serverName},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "srv",
|
|
Image: "gcr.io/google_containers/serve_hostname:v1.4",
|
|
Ports: []v1.ContainerPort{{ContainerPort: 9376}},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
podClient.CreateSync(serverPod)
|
|
|
|
// This service exposes port 8080 of the test pod as a service on port 8765
|
|
// TODO(filbranden): We would like to use a unique service name such as:
|
|
// svcName := "svc-envvars-" + randomSuffix()
|
|
// However, that affects the name of the environment variables which are the capitalized
|
|
// service name, so that breaks this test. One possibility is to tweak the variable names
|
|
// to match the service. Another is to rethink environment variable names and possibly
|
|
// allow overriding the prefix in the service manifest.
|
|
svcName := "fooservice"
|
|
svc := &v1.Service{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: svcName,
|
|
Labels: map[string]string{
|
|
"name": svcName,
|
|
},
|
|
},
|
|
Spec: v1.ServiceSpec{
|
|
Ports: []v1.ServicePort{{
|
|
Port: 8765,
|
|
TargetPort: intstr.FromInt(8080),
|
|
}},
|
|
Selector: map[string]string{
|
|
"name": serverName,
|
|
},
|
|
},
|
|
}
|
|
_, err := f.ClientSet.Core().Services(f.Namespace.Name).Create(svc)
|
|
Expect(err).NotTo(HaveOccurred(), "failed to create service")
|
|
|
|
// Make a client pod that verifies that it has the service environment variables.
|
|
podName := "client-envvars-" + string(uuid.NewUUID())
|
|
const containerName = "env3cont"
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: podName,
|
|
Labels: map[string]string{"name": podName},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: containerName,
|
|
Image: "gcr.io/google_containers/busybox:1.24",
|
|
Command: []string{"sh", "-c", "env"},
|
|
},
|
|
},
|
|
RestartPolicy: v1.RestartPolicyNever,
|
|
},
|
|
}
|
|
|
|
// It's possible for the Pod to be created before the Kubelet is updated with the new
|
|
// service. In that case, we just retry.
|
|
const maxRetries = 3
|
|
expectedVars := []string{
|
|
"FOOSERVICE_SERVICE_HOST=",
|
|
"FOOSERVICE_SERVICE_PORT=",
|
|
"FOOSERVICE_PORT=",
|
|
"FOOSERVICE_PORT_8765_TCP_PORT=",
|
|
"FOOSERVICE_PORT_8765_TCP_PROTO=",
|
|
"FOOSERVICE_PORT_8765_TCP=",
|
|
"FOOSERVICE_PORT_8765_TCP_ADDR=",
|
|
}
|
|
framework.ExpectNoErrorWithRetries(func() error {
|
|
return f.MatchContainerOutput(pod, containerName, expectedVars, ContainSubstring)
|
|
}, maxRetries, "Container should have service environment variables set")
|
|
})
|
|
|
|
It("should support remote command execution over websockets", func() {
|
|
config, err := framework.LoadConfig()
|
|
Expect(err).NotTo(HaveOccurred(), "unable to get base config")
|
|
|
|
By("creating the pod")
|
|
name := "pod-exec-websocket-" + string(uuid.NewUUID())
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: name,
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "main",
|
|
Image: "gcr.io/google_containers/busybox:1.24",
|
|
Command: []string{"/bin/sh", "-c", "echo container is alive; sleep 600"},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
By("submitting the pod to kubernetes")
|
|
pod = podClient.CreateSync(pod)
|
|
|
|
req := f.ClientSet.Core().RESTClient().Get().
|
|
Namespace(f.Namespace.Name).
|
|
Resource("pods").
|
|
Name(pod.Name).
|
|
Suffix("exec").
|
|
Param("stderr", "1").
|
|
Param("stdout", "1").
|
|
Param("container", pod.Spec.Containers[0].Name).
|
|
Param("command", "cat").
|
|
Param("command", "/etc/resolv.conf")
|
|
|
|
url := req.URL()
|
|
ws, err := framework.OpenWebSocketForURL(url, config, []string{"channel.k8s.io"})
|
|
if err != nil {
|
|
framework.Failf("Failed to open websocket to %s: %v", url.String(), err)
|
|
}
|
|
defer ws.Close()
|
|
|
|
buf := &bytes.Buffer{}
|
|
Eventually(func() error {
|
|
for {
|
|
var msg []byte
|
|
if err := websocket.Message.Receive(ws, &msg); err != nil {
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
framework.Failf("Failed to read completely from websocket %s: %v", url.String(), err)
|
|
}
|
|
if len(msg) == 0 {
|
|
continue
|
|
}
|
|
if msg[0] != 1 {
|
|
framework.Failf("Got message from server that didn't start with channel 1 (STDOUT): %v", msg)
|
|
}
|
|
buf.Write(msg[1:])
|
|
}
|
|
if buf.Len() == 0 {
|
|
return fmt.Errorf("Unexpected output from server")
|
|
}
|
|
if !strings.Contains(buf.String(), "nameserver") {
|
|
return fmt.Errorf("Expected to find 'nameserver' in %q", buf.String())
|
|
}
|
|
return nil
|
|
}, time.Minute, 10*time.Second).Should(BeNil())
|
|
})
|
|
|
|
It("should support retrieving logs from the container over websockets", func() {
|
|
config, err := framework.LoadConfig()
|
|
Expect(err).NotTo(HaveOccurred(), "unable to get base config")
|
|
|
|
By("creating the pod")
|
|
name := "pod-logs-websocket-" + string(uuid.NewUUID())
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: name,
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: "main",
|
|
Image: "gcr.io/google_containers/busybox:1.24",
|
|
Command: []string{"/bin/sh", "-c", "echo container is alive; sleep 10000"},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
By("submitting the pod to kubernetes")
|
|
podClient.CreateSync(pod)
|
|
|
|
req := f.ClientSet.Core().RESTClient().Get().
|
|
Namespace(f.Namespace.Name).
|
|
Resource("pods").
|
|
Name(pod.Name).
|
|
Suffix("log").
|
|
Param("container", pod.Spec.Containers[0].Name)
|
|
|
|
url := req.URL()
|
|
|
|
ws, err := framework.OpenWebSocketForURL(url, config, []string{"binary.k8s.io"})
|
|
if err != nil {
|
|
framework.Failf("Failed to open websocket to %s: %v", url.String(), err)
|
|
}
|
|
defer ws.Close()
|
|
buf := &bytes.Buffer{}
|
|
for {
|
|
var msg []byte
|
|
if err := websocket.Message.Receive(ws, &msg); err != nil {
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
framework.Failf("Failed to read completely from websocket %s: %v", url.String(), err)
|
|
}
|
|
if len(strings.TrimSpace(string(msg))) == 0 {
|
|
continue
|
|
}
|
|
buf.Write(msg)
|
|
}
|
|
if buf.String() != "container is alive\n" {
|
|
framework.Failf("Unexpected websocket logs:\n%s", buf.String())
|
|
}
|
|
})
|
|
|
|
It("should have their auto-restart back-off timer reset on image update [Slow]", func() {
|
|
podName := "pod-back-off-image"
|
|
containerName := "back-off"
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: podName,
|
|
Labels: map[string]string{"test": "back-off-image"},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: containerName,
|
|
Image: "gcr.io/google_containers/busybox:1.24",
|
|
Command: []string{"/bin/sh", "-c", "sleep 5", "/crash/missing"},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
delay1, delay2 := startPodAndGetBackOffs(podClient, pod, buildBackOffDuration)
|
|
|
|
By("updating the image")
|
|
podClient.Update(podName, func(pod *v1.Pod) {
|
|
pod.Spec.Containers[0].Image = "gcr.io/google_containers/nginx-slim:0.7"
|
|
})
|
|
|
|
time.Sleep(syncLoopFrequency)
|
|
framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
|
|
|
|
By("get restart delay after image update")
|
|
delayAfterUpdate, err := getRestartDelay(podClient, podName, containerName)
|
|
if err != nil {
|
|
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
|
|
}
|
|
|
|
if delayAfterUpdate > 2*delay2 || delayAfterUpdate > 2*delay1 {
|
|
framework.Failf("updating image did not reset the back-off value in pod=%s/%s d3=%s d2=%s d1=%s", podName, containerName, delayAfterUpdate, delay1, delay2)
|
|
}
|
|
})
|
|
|
|
// Slow issue #19027 (20 mins)
|
|
It("should cap back-off at MaxContainerBackOff [Slow]", func() {
|
|
podName := "back-off-cap"
|
|
containerName := "back-off-cap"
|
|
pod := &v1.Pod{
|
|
ObjectMeta: metav1.ObjectMeta{
|
|
Name: podName,
|
|
Labels: map[string]string{"test": "liveness"},
|
|
},
|
|
Spec: v1.PodSpec{
|
|
Containers: []v1.Container{
|
|
{
|
|
Name: containerName,
|
|
Image: "gcr.io/google_containers/busybox:1.24",
|
|
Command: []string{"/bin/sh", "-c", "sleep 5", "/crash/missing"},
|
|
},
|
|
},
|
|
},
|
|
}
|
|
|
|
podClient.CreateSync(pod)
|
|
time.Sleep(2 * kubelet.MaxContainerBackOff) // it takes slightly more than 2*x to get to a back-off of x
|
|
|
|
// wait for a delay == capped delay of MaxContainerBackOff
|
|
By("geting restart delay when capped")
|
|
var (
|
|
delay1 time.Duration
|
|
err error
|
|
)
|
|
for i := 0; i < 3; i++ {
|
|
delay1, err = getRestartDelay(podClient, podName, containerName)
|
|
if err != nil {
|
|
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
|
|
}
|
|
|
|
if delay1 < kubelet.MaxContainerBackOff {
|
|
continue
|
|
}
|
|
}
|
|
|
|
if (delay1 < kubelet.MaxContainerBackOff) || (delay1 > maxBackOffTolerance) {
|
|
framework.Failf("expected %s back-off got=%s in delay1", kubelet.MaxContainerBackOff, delay1)
|
|
}
|
|
|
|
By("getting restart delay after a capped delay")
|
|
delay2, err := getRestartDelay(podClient, podName, containerName)
|
|
if err != nil {
|
|
framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
|
|
}
|
|
|
|
if delay2 < kubelet.MaxContainerBackOff || delay2 > maxBackOffTolerance { // syncloop cumulative drift
|
|
framework.Failf("expected %s back-off got=%s on delay2", kubelet.MaxContainerBackOff, delay2)
|
|
}
|
|
})
|
|
})
|