Golang util.NewUUID函數代碼示例

func TestOverlappingRCs(t *testing.T) {
	client := client.NewOrDie(&client.Config{Host: "", Version: testapi.Version()})

	for i := 0; i < 5; i++ {
		manager := NewReplicationManager(client, 10)
		manager.podStoreSynced = alwaysReady

		// Create 10 rcs, shuffled them randomly and insert them into the rc manager's store
		var controllers []*api.ReplicationController
		for j := 1; j < 10; j++ {
			controllerSpec := newReplicationController(1)
			controllerSpec.CreationTimestamp = util.Date(2014, time.December, j, 0, 0, 0, 0, time.Local)
			controllerSpec.Name = string(util.NewUUID())
			controllers = append(controllers, controllerSpec)
		}
		shuffledControllers := shuffle(controllers)
		for j := range shuffledControllers {
			manager.rcStore.Store.Add(shuffledControllers[j])
		}
		// Add a pod and make sure only the oldest rc is synced
		pods := newPodList(nil, 1, api.PodPending, controllers[0])
		rcKey := getKey(controllers[0], t)

		manager.addPod(&pods.Items[0])
		queueRC, _ := manager.queue.Get()
		if queueRC != rcKey {
			t.Fatalf("Expected to find key %v in queue, found %v", rcKey, queueRC)
		}
	}
}

func testPodWithVolume(path string, source *api.EmptyDirVolumeSource) *api.Pod {
	podName := "pod-" + string(util.NewUUID())

	return &api.Pod{
		TypeMeta: api.TypeMeta{
			Kind:       "Pod",
			APIVersion: latest.Version,
		},
		ObjectMeta: api.ObjectMeta{
			Name: podName,
		},
		Spec: api.PodSpec{
			Containers: []api.Container{
				{
					Name:  containerName,
					Image: "kubernetes/mounttest:0.1",
					VolumeMounts: []api.VolumeMount{
						{
							Name:      volumeName,
							MountPath: path,
						},
					},
				},
			},
			Volumes: []api.Volume{
				{
					Name: volumeName,
					VolumeSource: api.VolumeSource{
						EmptyDir: source,
					},
				},
			},
		},
	}
}

func (v *VolumeOptions) Complete(f *clientcmd.Factory, cmd *cobra.Command, out io.Writer) error {
	clientConfig, err := f.ClientConfig()
	if err != nil {
		return err
	}
	v.OutputVersion = kcmdutil.OutputVersion(cmd, clientConfig.Version)

	cmdNamespace, err := f.DefaultNamespace()
	if err != nil {
		return err
	}
	mapper, typer := f.Object()

	v.DefaultNamespace = cmdNamespace
	v.Writer = out
	v.Mapper = mapper
	v.Typer = typer
	v.RESTClientFactory = f.Factory.RESTClient
	v.UpdatePodSpecForObject = f.UpdatePodSpecForObject

	if v.Add && len(v.Name) == 0 {
		v.Name = string(kutil.NewUUID())
		if len(v.Output) == 0 {
			fmt.Fprintf(v.Writer, "Generated volume name: %s\n", v.Name)
		}
	}
	// In case of volume source ignore the default volume type
	if len(v.AddOpts.Source) > 0 {
		v.AddOpts.Type = ""
	}
	return nil
}

// Create registers the given ReplicationController.
func (rs *REST) Create(ctx api.Context, obj runtime.Object) (<-chan apiserver.RESTResult, error) {
	controller, ok := obj.(*api.ReplicationController)
	if !ok {
		return nil, fmt.Errorf("not a replication controller: %#v", obj)
	}
	if !api.ValidNamespace(ctx, &controller.ObjectMeta) {
		return nil, errors.NewConflict("controller", controller.Namespace, fmt.Errorf("Controller.Namespace does not match the provided context"))
	}

	if len(controller.Name) == 0 {
		controller.Name = util.NewUUID().String()
	}
	if errs := validation.ValidateReplicationController(controller); len(errs) > 0 {
		return nil, errors.NewInvalid("replicationController", controller.Name, errs)
	}

	api.FillObjectMetaSystemFields(ctx, &controller.ObjectMeta)

	return apiserver.MakeAsync(func() (runtime.Object, error) {
		err := rs.registry.CreateController(ctx, controller)
		if err != nil {
			return nil, err
		}
		return rs.registry.GetController(ctx, controller.Name)
	}), nil
}

//TODO: To merge this with the emptyDir tests, we can make source a lambda.
func testPodWithHostVol(path string, source *api.HostPathVolumeSource) *api.Pod {
	podName := "pod-" + string(util.NewUUID())

	return &api.Pod{
		TypeMeta: api.TypeMeta{
			Kind:       "Pod",
			APIVersion: latest.Version,
		},
		ObjectMeta: api.ObjectMeta{
			Name: podName,
		},
		Spec: api.PodSpec{
			Containers: []api.Container{
				{
					Name:  containerName,
					Image: "gcr.io/google_containers/mounttest:0.2",
					VolumeMounts: []api.VolumeMount{
						{
							Name:      volumeName,
							MountPath: path,
						},
					},
				},
			},
			RestartPolicy: api.RestartPolicyNever,
			Volumes:       mount(source),
		},
	}
}

// Create a Secret object
func (rs *REST) Create(ctx api.Context, obj runtime.Object) (runtime.Object, error) {
	secret, ok := obj.(*api.Secret)
	if !ok {
		return nil, fmt.Errorf("invalid object type")
	}

	if !api.ValidNamespace(ctx, &secret.ObjectMeta) {
		return nil, errors.NewConflict("secret", secret.Namespace, fmt.Errorf("Secret.Namespace does not match the provided context"))
	}

	if len(secret.Name) == 0 {
		secret.Name = string(util.NewUUID())
	}

	if errs := validation.ValidateSecret(secret); len(errs) > 0 {
		return nil, errors.NewInvalid("secret", secret.Name, errs)
	}
	api.FillObjectMetaSystemFields(ctx, &secret.ObjectMeta)

	err := rs.registry.CreateWithName(ctx, secret.Name, secret)
	if err != nil {
		return nil, err
	}
	return rs.registry.Get(ctx, secret.Name)
}

// Create registers the given ReplicationController.
func (rs *REST) Create(ctx api.Context, obj runtime.Object) (<-chan apiserver.RESTResult, error) {
	controller, ok := obj.(*api.ReplicationController)
	if !ok {
		return nil, fmt.Errorf("not a replication controller: %#v", obj)
	}
	if !api.ValidNamespace(ctx, &controller.ObjectMeta) {
		return nil, errors.NewConflict("controller", controller.Namespace, fmt.Errorf("Controller.Namespace does not match the provided context"))
	}

	if len(controller.Name) == 0 {
		controller.Name = util.NewUUID().String()
	}
	// Pod Manifest ID should be assigned by the pod API
	controller.DesiredState.PodTemplate.DesiredState.Manifest.ID = ""
	if errs := validation.ValidateReplicationController(controller); len(errs) > 0 {
		return nil, errors.NewInvalid("replicationController", controller.Name, errs)
	}

	controller.CreationTimestamp = util.Now()

	return apiserver.MakeAsync(func() (runtime.Object, error) {
		err := rs.registry.CreateController(ctx, controller)
		if err != nil {
			return nil, err
		}
		return rs.registry.GetController(ctx, controller.Name)
	}), nil
}

// testHostIP tests that a pod gets a host IP
func testHostIP(c *client.Client, pod *api.Pod) {
	ns := "e2e-test-" + string(util.NewUUID())
	podClient := c.Pods(ns)
	By("creating pod")
	defer podClient.Delete(pod.Name)
	_, err := podClient.Create(pod)
	if err != nil {
		Fail(fmt.Sprintf("Failed to create pod: %v", err))
	}
	By("ensuring that pod is running and has a hostIP")
	// Wait for the pods to enter the running state. Waiting loops until the pods
	// are running so non-running pods cause a timeout for this test.
	err = waitForPodRunningInNamespace(c, pod.Name, ns)
	Expect(err).NotTo(HaveOccurred())
	// 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)
		Expect(err).NotTo(HaveOccurred())
		if p.Status.HostIP != "" {
			Logf("Pod %s has hostIP: %s", p.Name, p.Status.HostIP)
			break
		}
		if time.Since(t) >= hostIPTimeout {
			Failf("Gave up waiting for hostIP of pod %s after %v seconds",
				p.Name, time.Since(t).Seconds())
		}
		Logf("Retrying to get the hostIP of pod %s", p.Name)
		time.Sleep(5 * time.Second)
	}
}

func testPDPod(diskName, targetHost string, readOnly bool) *api.Pod {
	pod := &api.Pod{
		TypeMeta: api.TypeMeta{
			Kind:       "Pod",
			APIVersion: latest.Version,
		},
		ObjectMeta: api.ObjectMeta{
			Name: "pd-test-" + string(util.NewUUID()),
		},
		Spec: api.PodSpec{
			Containers: []api.Container{
				{
					Name:    "testpd",
					Image:   "gcr.io/google_containers/busybox",
					Command: []string{"sleep", "600"},
					VolumeMounts: []api.VolumeMount{
						{
							Name:      "testpd",
							MountPath: "/testpd",
						},
					},
				},
			},
			NodeName: targetHost,
		},
	}

	if testContext.Provider == "gce" || testContext.Provider == "gke" {
		pod.Spec.Volumes = []api.Volume{
			{
				Name: "testpd",
				VolumeSource: api.VolumeSource{
					GCEPersistentDisk: &api.GCEPersistentDiskVolumeSource{
						PDName:   diskName,
						FSType:   "ext4",
						ReadOnly: readOnly,
					},
				},
			},
		}
	} else if testContext.Provider == "aws" {
		pod.Spec.Volumes = []api.Volume{
			{
				Name: "testpd",
				VolumeSource: api.VolumeSource{
					AWSElasticBlockStore: &api.AWSElasticBlockStoreVolumeSource{
						VolumeID: diskName,
						FSType:   "ext4",
						ReadOnly: readOnly,
					},
				},
			},
		}
	} else {
		panic("Unknown provider: " + testContext.Provider)
	}

	return pod
}

func getService(servicePorts []api.ServicePort) *api.Service {
	return &api.Service{
		ObjectMeta: api.ObjectMeta{
			Name: string(util.NewUUID()), Namespace: ns},
		Spec: api.ServiceSpec{
			Ports: servicePorts,
		},
	}
}

func createDNSPod(namespace, probeCmd string) *api.Pod {
	pod := &api.Pod{
		TypeMeta: api.TypeMeta{
			Kind:       "Pod",
			APIVersion: latest.Version,
		},
		ObjectMeta: api.ObjectMeta{
			Name:      "dns-test-" + string(util.NewUUID()),
			Namespace: namespace,
		},
		Spec: api.PodSpec{
			Volumes: []api.Volume{
				{
					Name: "results",
					VolumeSource: api.VolumeSource{
						EmptyDir: &api.EmptyDirVolumeSource{},
					},
				},
			},
			Containers: []api.Container{
				// TODO: Consider scraping logs instead of running a webserver.
				{
					Name:  "webserver",
					Image: "gcr.io/google_containers/test-webserver",
					Ports: []api.ContainerPort{
						{
							Name:          "http",
							ContainerPort: 80,
						},
					},
					VolumeMounts: []api.VolumeMount{
						{
							Name:      "results",
							MountPath: "/results",
						},
					},
				},
				{
					Name:    "querier",
					Image:   "gcr.io/google_containers/dnsutils",
					Command: []string{"sh", "-c", probeCmd},
					VolumeMounts: []api.VolumeMount{
						{
							Name:      "results",
							MountPath: "/results",
						},
					},
				},
			},
		},
	}
	return pod
}

func getUniqueName(basename string, existingNames *util.StringSet) string {
	if !existingNames.Has(basename) {
		return basename
	}

	for i := 0; i < 100; i++ {
		trialName := fmt.Sprintf("%v-%d", basename, i)
		if !existingNames.Has(trialName) {
			return trialName
		}
	}

	return string(util.NewUUID())
}

func runLivenessTest(c *client.Client, podDescr *api.Pod, expectRestart bool) {
	ns := "e2e-test-" + string(util.NewUUID())
	_, err := createNamespaceIfDoesNotExist(c, ns)
	expectNoError(err, fmt.Sprintf("creating namespace %s", ns))

	By(fmt.Sprintf("Creating pod %s in namespace %s", podDescr.Name, ns))
	_, err = c.Pods(ns).Create(podDescr)
	expectNoError(err, fmt.Sprintf("creating pod %s", podDescr.Name))

	// At the end of the test, clean up by removing the pod.
	defer func() {
		By("deleting the pod")
		c.Pods(ns).Delete(podDescr.Name, nil)
	}()

	// Wait until the pod is not pending. (Here we need to check for something other than
	// 'Pending' other than checking for 'Running', since when failures occur, we go to
	// 'Terminated' which can cause indefinite blocking.)
	expectNoError(waitForPodNotPending(c, ns, podDescr.Name),
		fmt.Sprintf("starting pod %s in namespace %s", podDescr.Name, ns))
	By(fmt.Sprintf("Started pod %s in namespace %s", podDescr.Name, ns))

	// Check the pod's current state and verify that restartCount is present.
	By("checking the pod's current state and verifying that restartCount is present")
	pod, err := c.Pods(ns).Get(podDescr.Name)
	expectNoError(err, fmt.Sprintf("getting pod %s in namespace %s", podDescr.Name, ns))
	initialRestartCount := api.GetExistingContainerStatus(pod.Status.ContainerStatuses, "liveness").RestartCount
	By(fmt.Sprintf("Initial restart count of pod %s is %d", podDescr.Name, initialRestartCount))

	// Wait for at most 48 * 5 = 240s = 4 minutes until restartCount is incremented
	restarts := false
	for i := 0; i < 48; i++ {
		// Wait until restartCount is incremented.
		time.Sleep(5 * time.Second)
		pod, err = c.Pods(ns).Get(podDescr.Name)
		expectNoError(err, fmt.Sprintf("getting pod %s", podDescr.Name))
		restartCount := api.GetExistingContainerStatus(pod.Status.ContainerStatuses, "liveness").RestartCount
		By(fmt.Sprintf("Restart count of pod %s in namespace %s is now %d", podDescr.Name, ns, restartCount))
		if restartCount > initialRestartCount {
			By(fmt.Sprintf("Restart count of pod %s in namespace %s increased from %d to %d during the test", podDescr.Name, ns, initialRestartCount, restartCount))
			restarts = true
			break
		}
	}

	if restarts != expectRestart {
		Fail(fmt.Sprintf("pod %s in namespace %s - expected restarts: %v, found restarts: %v", podDescr.Name, ns, expectRestart, restarts))
	}
}

func makePodSpec(readinessProbe, livenessProbe *api.Probe) *api.Pod {
	pod := &api.Pod{
		ObjectMeta: api.ObjectMeta{Name: "nginx-" + string(util.NewUUID())},
		Spec: api.PodSpec{
			Containers: []api.Container{
				{
					Name:           "nginx",
					Image:          "nginx",
					LivenessProbe:  livenessProbe,
					ReadinessProbe: readinessProbe,
				},
			},
		},
	}
	return pod
}

func GetBootstrapPolicy() *authorizationapi.ClusterPolicy {
	policy := &authorizationapi.ClusterPolicy{
		ObjectMeta: kapi.ObjectMeta{
			Name:              authorizationapi.PolicyName,
			CreationTimestamp: util.Now(),
			UID:               util.NewUUID(),
		},
		LastModified: util.Now(),
		Roles:        make(map[string]*authorizationapi.ClusterRole),
	}

	roles := bootstrappolicy.GetBootstrapClusterRoles()
	for i := range roles {
		policy.Roles[roles[i].Name] = &roles[i]
	}

	return policy
}