mirror of
https://github.com/k3s-io/kubernetes.git
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662 lines
20 KiB
Go
662 lines
20 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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"bytes"
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"fmt"
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"io"
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"strconv"
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"strings"
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"time"
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"golang.org/x/net/websocket"
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"k8s.io/kubernetes/pkg/api/v1"
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metav1 "k8s.io/kubernetes/pkg/apis/meta/v1"
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"k8s.io/kubernetes/pkg/kubelet"
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"k8s.io/kubernetes/pkg/labels"
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"k8s.io/kubernetes/pkg/util/intstr"
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"k8s.io/kubernetes/pkg/util/uuid"
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"k8s.io/kubernetes/pkg/util/wait"
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"k8s.io/kubernetes/pkg/watch"
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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 (
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buildBackOffDuration = time.Minute
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syncLoopFrequency = 10 * time.Second
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maxBackOffTolerance = time.Duration(1.3 * float64(kubelet.MaxContainerBackOff))
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)
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// testHostIP tests that a pod gets a host IP
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func testHostIP(podClient *framework.PodClient, pod *v1.Pod) {
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By("creating pod")
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podClient.CreateSync(pod)
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// Try to make sure we get a hostIP for each pod.
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hostIPTimeout := 2 * time.Minute
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t := time.Now()
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for {
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p, err := podClient.Get(pod.Name, metav1.GetOptions{})
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Expect(err).NotTo(HaveOccurred(), "Failed to get pod %q", pod.Name)
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if p.Status.HostIP != "" {
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framework.Logf("Pod %s has hostIP: %s", p.Name, p.Status.HostIP)
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break
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}
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if time.Since(t) >= hostIPTimeout {
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framework.Failf("Gave up waiting for hostIP of pod %s after %v seconds",
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p.Name, time.Since(t).Seconds())
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}
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framework.Logf("Retrying to get the hostIP of pod %s", p.Name)
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time.Sleep(5 * time.Second)
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}
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}
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func startPodAndGetBackOffs(podClient *framework.PodClient, pod *v1.Pod, sleepAmount time.Duration) (time.Duration, time.Duration) {
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podClient.CreateSync(pod)
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time.Sleep(sleepAmount)
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Expect(pod.Spec.Containers).NotTo(BeEmpty())
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podName := pod.Name
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containerName := pod.Spec.Containers[0].Name
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By("getting restart delay-0")
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_, err := getRestartDelay(podClient, podName, containerName)
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if err != nil {
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framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
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}
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By("getting restart delay-1")
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delay1, err := getRestartDelay(podClient, podName, containerName)
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if err != nil {
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framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
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}
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By("getting restart delay-2")
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delay2, err := getRestartDelay(podClient, podName, containerName)
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if err != nil {
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framework.Failf("timed out waiting for container restart in pod=%s/%s", podName, containerName)
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}
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return delay1, delay2
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}
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func getRestartDelay(podClient *framework.PodClient, podName string, containerName string) (time.Duration, error) {
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beginTime := time.Now()
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for time.Since(beginTime) < (2 * maxBackOffTolerance) { // may just miss the 1st MaxContainerBackOff delay
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time.Sleep(time.Second)
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pod, err := podClient.Get(podName, metav1.GetOptions{})
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framework.ExpectNoError(err, fmt.Sprintf("getting pod %s", podName))
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status, ok := v1.GetContainerStatus(pod.Status.ContainerStatuses, containerName)
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if !ok {
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framework.Logf("getRestartDelay: status missing")
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continue
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}
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if status.State.Waiting == nil && status.State.Running != nil && status.LastTerminationState.Terminated != nil && status.State.Running.StartedAt.Time.After(beginTime) {
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startedAt := status.State.Running.StartedAt.Time
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finishedAt := status.LastTerminationState.Terminated.FinishedAt.Time
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framework.Logf("getRestartDelay: restartCount = %d, finishedAt=%s restartedAt=%s (%s)", status.RestartCount, finishedAt, startedAt, startedAt.Sub(finishedAt))
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return startedAt.Sub(finishedAt), nil
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}
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}
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return 0, fmt.Errorf("timeout getting pod restart delay")
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}
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var _ = framework.KubeDescribe("Pods", func() {
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f := framework.NewDefaultFramework("pods")
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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 get a host IP [Conformance]", func() {
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name := "pod-hostip-" + string(uuid.NewUUID())
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testHostIP(podClient, &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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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: "test",
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Image: framework.GetPauseImageName(f.ClientSet),
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},
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},
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},
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})
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})
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It("should be submitted and removed [Conformance]", func() {
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By("creating the pod")
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name := "pod-submit-remove-" + 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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Containers: []v1.Container{
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{
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Name: "nginx",
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Image: "gcr.io/google_containers/nginx-slim:0.7",
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},
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},
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},
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}
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By("setting up watch")
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selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
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options := v1.ListOptions{LabelSelector: selector.String()}
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pods, err := podClient.List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
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Expect(len(pods.Items)).To(Equal(0))
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options = v1.ListOptions{
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LabelSelector: selector.String(),
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ResourceVersion: pods.ListMeta.ResourceVersion,
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}
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w, err := podClient.Watch(options)
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Expect(err).NotTo(HaveOccurred(), "failed to set up watch")
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By("submitting the pod to kubernetes")
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podClient.Create(pod)
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By("verifying the pod is in kubernetes")
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selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
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options = v1.ListOptions{LabelSelector: selector.String()}
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pods, err = podClient.List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
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Expect(len(pods.Items)).To(Equal(1))
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By("verifying pod creation was observed")
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select {
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case event, _ := <-w.ResultChan():
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if event.Type != watch.Added {
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framework.Failf("Failed to observe pod creation: %v", event)
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}
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case <-time.After(framework.PodStartTimeout):
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Fail("Timeout while waiting for pod creation")
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}
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// We need to wait for the pod to be running, otherwise the deletion
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// may be carried out immediately rather than gracefully.
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framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
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// save the running pod
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pod, err = podClient.Get(pod.Name, metav1.GetOptions{})
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Expect(err).NotTo(HaveOccurred(), "failed to GET scheduled pod")
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framework.Logf("running pod: %#v", pod)
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By("deleting the pod gracefully")
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err = podClient.Delete(pod.Name, v1.NewDeleteOptions(30))
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Expect(err).NotTo(HaveOccurred(), "failed to delete pod")
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By("verifying the kubelet observed the termination notice")
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Expect(wait.Poll(time.Second*5, time.Second*30, func() (bool, error) {
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podList, err := framework.GetKubeletPods(f.ClientSet, pod.Spec.NodeName)
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if err != nil {
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framework.Logf("Unable to retrieve kubelet pods for node %v: %v", pod.Spec.NodeName, err)
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return false, nil
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}
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for _, kubeletPod := range podList.Items {
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if pod.Name != kubeletPod.Name {
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continue
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}
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if kubeletPod.ObjectMeta.DeletionTimestamp == nil {
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framework.Logf("deletion has not yet been observed")
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return false, nil
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}
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return true, nil
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}
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framework.Logf("no pod exists with the name we were looking for, assuming the termination request was observed and completed")
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return true, nil
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})).NotTo(HaveOccurred(), "kubelet never observed the termination notice")
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By("verifying pod deletion was observed")
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deleted := false
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timeout := false
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var lastPod *v1.Pod
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timer := time.After(30 * time.Second)
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for !deleted && !timeout {
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select {
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case event, _ := <-w.ResultChan():
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if event.Type == watch.Deleted {
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lastPod = event.Object.(*v1.Pod)
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deleted = true
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}
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case <-timer:
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timeout = true
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}
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}
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if !deleted {
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Fail("Failed to observe pod deletion")
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}
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Expect(lastPod.DeletionTimestamp).ToNot(BeNil())
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Expect(lastPod.Spec.TerminationGracePeriodSeconds).ToNot(BeZero())
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selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
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options = v1.ListOptions{LabelSelector: selector.String()}
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pods, err = podClient.List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
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Expect(len(pods.Items)).To(Equal(0))
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})
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It("should be updated [Conformance]", func() {
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By("creating the pod")
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name := "pod-update-" + 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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Containers: []v1.Container{
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{
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Name: "nginx",
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Image: "gcr.io/google_containers/nginx-slim:0.7",
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},
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},
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},
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}
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By("submitting the pod to kubernetes")
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pod = podClient.CreateSync(pod)
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By("verifying the pod is in kubernetes")
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selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
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options := v1.ListOptions{LabelSelector: selector.String()}
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pods, err := podClient.List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
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Expect(len(pods.Items)).To(Equal(1))
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By("updating the pod")
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podClient.Update(name, func(pod *v1.Pod) {
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value = strconv.Itoa(time.Now().Nanosecond())
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pod.Labels["time"] = value
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})
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framework.ExpectNoError(f.WaitForPodRunning(pod.Name))
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By("verifying the updated pod is in kubernetes")
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selector = labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
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options = v1.ListOptions{LabelSelector: selector.String()}
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pods, err = podClient.List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
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Expect(len(pods.Items)).To(Equal(1))
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framework.Logf("Pod update OK")
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})
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It("should allow activeDeadlineSeconds to be updated [Conformance]", func() {
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By("creating the pod")
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name := "pod-update-activedeadlineseconds-" + 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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Containers: []v1.Container{
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{
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Name: "nginx",
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Image: "gcr.io/google_containers/nginx-slim:0.7",
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},
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},
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},
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}
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By("submitting the pod to kubernetes")
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podClient.CreateSync(pod)
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By("verifying the pod is in kubernetes")
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selector := labels.SelectorFromSet(labels.Set(map[string]string{"time": value}))
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options := v1.ListOptions{LabelSelector: selector.String()}
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pods, err := podClient.List(options)
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Expect(err).NotTo(HaveOccurred(), "failed to query for pods")
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Expect(len(pods.Items)).To(Equal(1))
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By("updating the pod")
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podClient.Update(name, func(pod *v1.Pod) {
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newDeadline := int64(5)
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pod.Spec.ActiveDeadlineSeconds = &newDeadline
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})
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framework.ExpectNoError(f.WaitForPodTerminated(pod.Name, "DeadlineExceeded"))
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})
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It("should contain environment variables for services [Conformance]", func() {
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// Make a pod that will be a service.
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// This pod serves its hostname via HTTP.
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serverName := "server-envvars-" + string(uuid.NewUUID())
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serverPod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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Name: serverName,
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Labels: map[string]string{"name": serverName},
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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: "srv",
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Image: "gcr.io/google_containers/serve_hostname:v1.4",
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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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podClient.CreateSync(serverPod)
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// This service exposes port 8080 of the test pod as a service on port 8765
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// TODO(filbranden): We would like to use a unique service name such as:
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// svcName := "svc-envvars-" + randomSuffix()
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// However, that affects the name of the environment variables which are the capitalized
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// service name, so that breaks this test. One possibility is to tweak the variable names
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// to match the service. Another is to rethink environment variable names and possibly
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// allow overriding the prefix in the service manifest.
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svcName := "fooservice"
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svc := &v1.Service{
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ObjectMeta: v1.ObjectMeta{
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Name: svcName,
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Labels: map[string]string{
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"name": svcName,
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},
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},
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Spec: v1.ServiceSpec{
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Ports: []v1.ServicePort{{
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Port: 8765,
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TargetPort: intstr.FromInt(8080),
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}},
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Selector: map[string]string{
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"name": serverName,
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},
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},
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}
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_, err := f.ClientSet.Core().Services(f.Namespace.Name).Create(svc)
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Expect(err).NotTo(HaveOccurred(), "failed to create service")
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// Make a client pod that verifies that it has the service environment variables.
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podName := "client-envvars-" + string(uuid.NewUUID())
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const containerName = "env3cont"
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pod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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Name: podName,
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Labels: map[string]string{"name": podName},
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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: containerName,
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"sh", "-c", "env"},
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},
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},
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RestartPolicy: v1.RestartPolicyNever,
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},
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}
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// It's possible for the Pod to be created before the Kubelet is updated with the new
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// service. In that case, we just retry.
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const maxRetries = 3
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expectedVars := []string{
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"FOOSERVICE_SERVICE_HOST=",
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"FOOSERVICE_SERVICE_PORT=",
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"FOOSERVICE_PORT=",
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"FOOSERVICE_PORT_8765_TCP_PORT=",
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"FOOSERVICE_PORT_8765_TCP_PROTO=",
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"FOOSERVICE_PORT_8765_TCP=",
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"FOOSERVICE_PORT_8765_TCP_ADDR=",
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}
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framework.ExpectNoErrorWithRetries(func() error {
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return f.MatchContainerOutput(pod, containerName, expectedVars, ContainSubstring)
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}, maxRetries, "Container should have service environment variables set")
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})
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It("should support remote command execution over websockets", func() {
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config, err := framework.LoadConfig()
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Expect(err).NotTo(HaveOccurred(), "unable to get base config")
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By("creating the pod")
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name := "pod-exec-websocket-" + string(uuid.NewUUID())
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pod := &v1.Pod{
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ObjectMeta: v1.ObjectMeta{
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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: "main",
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Image: "gcr.io/google_containers/busybox:1.24",
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Command: []string{"/bin/sh", "-c", "echo container is alive; sleep 600"},
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},
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},
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},
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}
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By("submitting the pod to kubernetes")
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pod = podClient.CreateSync(pod)
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req := f.ClientSet.Core().RESTClient().Get().
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Namespace(f.Namespace.Name).
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Resource("pods").
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Name(pod.Name).
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Suffix("exec").
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Param("stderr", "1").
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Param("stdout", "1").
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Param("container", pod.Spec.Containers[0].Name).
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Param("command", "cat").
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Param("command", "/etc/resolv.conf")
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url := req.URL()
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ws, err := framework.OpenWebSocketForURL(url, config, []string{"channel.k8s.io"})
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if err != nil {
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framework.Failf("Failed to open websocket to %s: %v", url.String(), err)
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}
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defer ws.Close()
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buf := &bytes.Buffer{}
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Eventually(func() error {
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for {
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var msg []byte
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if err := websocket.Message.Receive(ws, &msg); err != nil {
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if err == io.EOF {
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break
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}
|
|
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: v1.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: v1.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: v1.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)
|
|
}
|
|
})
|
|
})
|