Golang framework.LookForStringInPodExec函数代码示例

// Start a client pod using given VolumeSource (exported by startVolumeServer())
// and check that the pod sees the data from the server pod.
func testVolumeClient(f *framework.Framework, config VolumeTestConfig, volume v1.VolumeSource, fsGroup *int64, expectedContent string) {
	By(fmt.Sprint("starting ", config.prefix, " client"))
	clientPod := &v1.Pod{
		TypeMeta: metav1.TypeMeta{
			Kind:       "Pod",
			APIVersion: "v1",
		},
		ObjectMeta: metav1.ObjectMeta{
			Name: config.prefix + "-client",
			Labels: map[string]string{
				"role": config.prefix + "-client",
			},
		},
		Spec: v1.PodSpec{
			Containers: []v1.Container{
				{
					Name:       config.prefix + "-client",
					Image:      "gcr.io/google_containers/busybox:1.24",
					WorkingDir: "/opt",
					// An imperative and easily debuggable container which reads vol contents for
					// us to scan in the tests or by eye.
					// We expect that /opt is empty in the minimal containers which we use in this test.
					Command: []string{
						"/bin/sh",
						"-c",
						"while true ; do cat /opt/index.html ; sleep 2 ; ls -altrh /opt/  ; sleep 2 ; done ",
					},
					VolumeMounts: []v1.VolumeMount{
						{
							Name:      config.prefix + "-volume",
							MountPath: "/opt/",
						},
					},
				},
			},
			SecurityContext: &v1.PodSecurityContext{
				SELinuxOptions: &v1.SELinuxOptions{
					Level: "s0:c0,c1",
				},
			},
			Volumes: []v1.Volume{
				{
					Name:         config.prefix + "-volume",
					VolumeSource: volume,
				},
			},
		},
	}
	podClient := f.PodClient()

	if fsGroup != nil {
		clientPod.Spec.SecurityContext.FSGroup = fsGroup
	}
	clientPod = podClient.CreateSync(clientPod)

	By("Checking that text file contents are perfect.")
	result := f.ExecCommandInPod(clientPod.Name, "cat", "/opt/index.html")
	var err error
	if !strings.Contains(result, expectedContent) {
		err = fmt.Errorf("Failed to find \"%s\", last result: \"%s\"", expectedContent, result)
	}
	Expect(err).NotTo(HaveOccurred(), "failed: finding the contents of the mounted file.")

	if fsGroup != nil {

		By("Checking fsGroup is correct.")
		_, err := framework.LookForStringInPodExec(config.namespace, clientPod.Name, []string{"ls", "-ld", "/opt"}, strconv.Itoa(int(*fsGroup)), time.Minute)
		Expect(err).NotTo(HaveOccurred(), "failed: getting the right priviliges in the file %v", int(*fsGroup))
	}
}

// Start a client pod using given VolumeSource (exported by startVolumeServer())
// and check that the pod sees the data from the server pod.
func testVolumeClient(client *client.Client, config VolumeTestConfig, volume api.VolumeSource, fsGroup *int64, expectedContent string) {
	By(fmt.Sprint("starting ", config.prefix, " client"))
	clientPod := &api.Pod{
		TypeMeta: unversioned.TypeMeta{
			Kind:       "Pod",
			APIVersion: "v1",
		},
		ObjectMeta: api.ObjectMeta{
			Name: config.prefix + "-client",
			Labels: map[string]string{
				"role": config.prefix + "-client",
			},
		},
		Spec: api.PodSpec{
			Containers: []api.Container{
				{
					Name:       config.prefix + "-client",
					Image:      "gcr.io/google_containers/busybox:1.24",
					WorkingDir: "/opt",
					// An imperative and easily debuggable container which reads vol contents for
					// us to scan in the tests or by eye.
					// We expect that /opt is empty in the minimal containers which we use in this test.
					Command: []string{
						"/bin/sh",
						"-c",
						"while true ; do cat /opt/index.html ; sleep 2 ; ls -altrh /opt/  ; sleep 2 ; done ",
					},
					VolumeMounts: []api.VolumeMount{
						{
							Name:      config.prefix + "-volume",
							MountPath: "/opt/",
						},
					},
				},
			},
			SecurityContext: &api.PodSecurityContext{
				SELinuxOptions: &api.SELinuxOptions{
					Level: "s0:c0,c1",
				},
			},
			Volumes: []api.Volume{
				{
					Name:         config.prefix + "-volume",
					VolumeSource: volume,
				},
			},
		},
	}
	podsNamespacer := client.Pods(config.namespace)

	if fsGroup != nil {
		clientPod.Spec.SecurityContext.FSGroup = fsGroup
	}
	clientPod, err := podsNamespacer.Create(clientPod)
	if err != nil {
		framework.Failf("Failed to create %s pod: %v", clientPod.Name, err)
	}
	framework.ExpectNoError(framework.WaitForPodRunningInNamespace(client, clientPod))

	By("Checking that text file contents are perfect.")
	_, err = framework.LookForStringInPodExec(config.namespace, clientPod.Name, []string{"cat", "/opt/index.html"}, expectedContent, time.Minute)
	Expect(err).NotTo(HaveOccurred(), "failed: finding the contents of the mounted file.")

	if fsGroup != nil {

		By("Checking fsGroup is correct.")
		_, err = framework.LookForStringInPodExec(config.namespace, clientPod.Name, []string{"ls", "-ld", "/opt"}, strconv.Itoa(int(*fsGroup)), time.Minute)
		Expect(err).NotTo(HaveOccurred(), "failed: getting the right priviliges in the file %v", int(*fsGroup))
	}
}

		// the name is already resolvable. So let's try to query DNS from
		// the pod we have, until we find our service name.
		// This complicated code may be removed if the pod itself retried after
		// dns error or timeout.
		// This code is probably unnecessary, but let's stay on the safe side.
		label := labels.SelectorFromSet(labels.Set(map[string]string{"name": backendPodName}))
		options := api.ListOptions{LabelSelector: label}
		pods, err := c.Pods(namespaces[0].Name).List(options)

		if err != nil || pods == nil || len(pods.Items) == 0 {
			framework.Failf("no running pods found")
		}
		podName := pods.Items[0].Name

		queryDns := fmt.Sprintf(queryDnsPythonTemplate, backendSvcName+"."+namespaces[0].Name)
		_, err = framework.LookForStringInPodExec(namespaces[0].Name, podName, []string{"python", "-c", queryDns}, "ok", dnsReadyTimeout)
		Expect(err).NotTo(HaveOccurred(), "waiting for output from pod exec")

		updatedPodYaml := prepareResourceWithReplacedString(frontendPodYaml, "dns-backend.development.cluster.local", fmt.Sprintf("dns-backend.%s.svc.cluster.local", namespaces[0].Name))

		// create a pod in each namespace
		for _, ns := range namespaces {
			framework.NewKubectlCommand("create", "-f", "-", getNsCmdFlag(ns)).WithStdinData(updatedPodYaml).ExecOrDie()
		}

		// wait until the pods have been scheduler, i.e. are not Pending anymore. Remember
		// that we cannot wait for the pods to be running because our pods terminate by themselves.
		for _, ns := range namespaces {
			err := framework.WaitForPodNotPending(c, ns.Name, frontendPodName)
			framework.ExpectNoError(err)
		}