Golang framework.WaitForDeploymentStatus函数代码示例

func testNewDeployment(f *framework.Framework) {
	ns := f.Namespace.Name
	// TODO: remove unversionedClient when the refactoring is done. Currently some
	// functions like verifyPod still expects a unversioned#Client.
	c := adapter.FromUnversionedClient(f.Client)

	deploymentName := "test-new-deployment"
	podLabels := map[string]string{"name": nginxImageName}
	replicas := 1
	framework.Logf("Creating simple deployment %s", deploymentName)
	d := newDeployment(deploymentName, replicas, podLabels, nginxImageName, nginxImage, extensions.RollingUpdateDeploymentStrategyType, nil)
	d.Annotations = map[string]string{"test": "should-copy-to-replica-set", kubectl.LastAppliedConfigAnnotation: "should-not-copy-to-replica-set"}
	_, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "1", nginxImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, replicas, replicas-1, replicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())
	newRS, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	// Check new RS annotations
	Expect(newRS.Annotations["test"]).Should(Equal("should-copy-to-replica-set"))
	Expect(newRS.Annotations[kubectl.LastAppliedConfigAnnotation]).Should(Equal(""))
	Expect(deployment.Annotations["test"]).Should(Equal("should-copy-to-replica-set"))
	Expect(deployment.Annotations[kubectl.LastAppliedConfigAnnotation]).Should(Equal("should-not-copy-to-replica-set"))
}

func testDeploymentLabelAdopted(f *framework.Framework) {
	ns := f.Namespace.Name
	// TODO: remove unversionedClient when the refactoring is done. Currently some
	// functions like verifyPod still expects a unversioned#Client.
	unversionedClient := f.Client
	c := adapter.FromUnversionedClient(unversionedClient)
	// Create nginx pods.
	podName := "nginx"
	podLabels := map[string]string{"name": podName}

	rsName := "test-adopted-controller"
	replicas := 3
	image := nginxImage
	_, err := c.Extensions().ReplicaSets(ns).Create(newRS(rsName, replicas, podLabels, podName, image))
	Expect(err).NotTo(HaveOccurred())
	// Verify that the required pods have come up.
	err = framework.VerifyPods(unversionedClient, ns, podName, false, 3)
	if err != nil {
		framework.Logf("error in waiting for pods to come up: %s", err)
		Expect(err).NotTo(HaveOccurred())
	}

	// Create a nginx deployment to adopt the old rs.
	deploymentName := "test-adopted-deployment"
	framework.Logf("Creating deployment %s", deploymentName)
	_, err = c.Extensions().Deployments(ns).Create(newDeployment(deploymentName, replicas, podLabels, podName, image, extensions.RollingUpdateDeploymentStrategyType, nil))
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "1", image)
	Expect(err).NotTo(HaveOccurred())

	// The RS and pods should be relabeled before the status is updated by syncRollingUpdateDeployment
	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, replicas, replicas-1, replicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	// There should be no old RSs (overlapping RS)
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())
	oldRSs, allOldRSs, err := deploymentutil.GetOldReplicaSets(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	Expect(len(oldRSs)).Should(Equal(0))
	Expect(len(allOldRSs)).Should(Equal(0))
	// New RS should contain pod-template-hash in its selector, label, and template label
	newRS, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	err = framework.CheckRSHashLabel(newRS)
	Expect(err).NotTo(HaveOccurred())
	// All pods targeted by the deployment should contain pod-template-hash in their labels, and there should be only 3 pods
	selector, err := unversioned.LabelSelectorAsSelector(deployment.Spec.Selector)
	Expect(err).NotTo(HaveOccurred())
	options := api.ListOptions{LabelSelector: selector}
	pods, err := c.Core().Pods(ns).List(options)
	Expect(err).NotTo(HaveOccurred())
	err = framework.CheckPodHashLabel(pods)
	Expect(err).NotTo(HaveOccurred())
	Expect(len(pods.Items)).Should(Equal(replicas))
}

func testRecreateDeployment(f *framework.Framework) {
	ns := f.Namespace.Name
	// TODO: remove unversionedClient when the refactoring is done. Currently some
	// functions like verifyPod still expects a unversioned#Client.
	unversionedClient := f.Client
	c := adapter.FromUnversionedClient(unversionedClient)
	// Create nginx pods.
	deploymentPodLabels := map[string]string{"name": "sample-pod-3"}
	rsPodLabels := map[string]string{
		"name": "sample-pod-3",
		"pod":  nginxImageName,
	}

	rsName := "test-recreate-controller"
	replicas := 3
	_, err := c.Extensions().ReplicaSets(ns).Create(newRS(rsName, replicas, rsPodLabels, nginxImageName, nginxImage))
	Expect(err).NotTo(HaveOccurred())
	// Verify that the required pods have come up.
	err = framework.VerifyPods(unversionedClient, ns, "sample-pod-3", false, 3)
	if err != nil {
		framework.Logf("error in waiting for pods to come up: %s", err)
		Expect(err).NotTo(HaveOccurred())
	}

	// Create a deployment to delete nginx pods and instead bring up redis pods.
	deploymentName := "test-recreate-deployment"
	framework.Logf("Creating deployment %s", deploymentName)
	_, err = c.Extensions().Deployments(ns).Create(newDeployment(deploymentName, replicas, deploymentPodLabels, redisImageName, redisImage, extensions.RecreateDeploymentStrategyType, nil))
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "1", redisImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, replicas, 0, replicas, 0)
	Expect(err).NotTo(HaveOccurred())

	// Verify that the pods were scaled up and down as expected. We use events to verify that.
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())
	framework.WaitForEvents(unversionedClient, ns, deployment, 2)
	events, err := c.Core().Events(ns).Search(deployment)
	if err != nil {
		framework.Logf("error in listing events: %s", err)
		Expect(err).NotTo(HaveOccurred())
	}
	// There should be 2 events, one to scale up the new ReplicaSet and then to scale down the old ReplicaSet.
	Expect(len(events.Items)).Should(Equal(2))
	newRS, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	Expect(newRS).NotTo(Equal(nil))
	Expect(events.Items[0].Message).Should(Equal(fmt.Sprintf("Scaled down replica set %s to 0", rsName)))
	Expect(events.Items[1].Message).Should(Equal(fmt.Sprintf("Scaled up replica set %s to 3", newRS.Name)))
}

func testRollingUpdateDeployment(f *framework.Framework) {
	ns := f.Namespace.Name
	// TODO: remove unversionedClient when the refactoring is done. Currently some
	// functions like verifyPod still expects a unversioned#Client.
	unversionedClient := f.Client
	c := adapter.FromUnversionedClient(unversionedClient)
	// Create nginx pods.
	deploymentPodLabels := map[string]string{"name": "sample-pod"}
	rsPodLabels := map[string]string{
		"name": "sample-pod",
		"pod":  nginxImageName,
	}

	rsName := "test-rolling-update-controller"
	replicas := 3
	_, err := c.Extensions().ReplicaSets(ns).Create(newRS(rsName, replicas, rsPodLabels, nginxImageName, nginxImage))
	Expect(err).NotTo(HaveOccurred())
	// Verify that the required pods have come up.
	err = framework.VerifyPods(unversionedClient, ns, "sample-pod", false, 3)
	if err != nil {
		framework.Logf("error in waiting for pods to come up: %s", err)
		Expect(err).NotTo(HaveOccurred())
	}

	// Create a deployment to delete nginx pods and instead bring up redis pods.
	deploymentName := "test-rolling-update-deployment"
	framework.Logf("Creating deployment %s", deploymentName)
	_, err = c.Extensions().Deployments(ns).Create(newDeployment(deploymentName, replicas, deploymentPodLabels, redisImageName, redisImage, extensions.RollingUpdateDeploymentStrategyType, nil))
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "1", redisImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, replicas, replicas-1, replicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	// There should be 1 old RS (nginx-controller, which is adopted)
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())
	_, allOldRSs, err := deploymentutil.GetOldReplicaSets(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	Expect(len(allOldRSs)).Should(Equal(1))
	// The old RS should contain pod-template-hash in its selector, label, and template label
	Expect(len(allOldRSs[0].Labels[extensions.DefaultDeploymentUniqueLabelKey])).Should(BeNumerically(">", 0))
	Expect(len(allOldRSs[0].Spec.Selector.MatchLabels[extensions.DefaultDeploymentUniqueLabelKey])).Should(BeNumerically(">", 0))
	Expect(len(allOldRSs[0].Spec.Template.Labels[extensions.DefaultDeploymentUniqueLabelKey])).Should(BeNumerically(">", 0))
}

// testRollbackDeploymentRSNoRevision tests that deployment supports rollback even when there's old replica set without revision.
// An old replica set without revision is created, and then a deployment is created (v1). The deployment shouldn't add revision
// annotation to the old replica set. Then rollback the deployment to last revision, and it should fail.
// Then update the deployment to v2 and rollback it to v1 should succeed, now the deployment
// becomes v3. Then rollback the deployment to v10 (doesn't exist in history) should fail.
// Finally, rollback the deployment (v3) to v3 should be no-op.
// TODO: When we finished reporting rollback status in deployment status, check the rollback status here in each case.
func testRollbackDeploymentRSNoRevision(f *framework.Framework) {
	ns := f.Namespace.Name
	c := adapter.FromUnversionedClient(f.Client)
	podName := "nginx"
	deploymentPodLabels := map[string]string{"name": podName}
	rsPodLabels := map[string]string{
		"name": podName,
		"pod":  nginxImageName,
	}

	// Create an old RS without revision
	rsName := "test-rollback-no-revision-controller"
	rsReplicas := 0
	rs := newRS(rsName, rsReplicas, rsPodLabels, nginxImageName, nginxImage)
	rs.Annotations = make(map[string]string)
	rs.Annotations["make"] = "difference"
	_, err := c.Extensions().ReplicaSets(ns).Create(rs)
	Expect(err).NotTo(HaveOccurred())

	// 1. Create a deployment to create nginx pods, which have different template than the replica set created above.
	deploymentName, deploymentImageName := "test-rollback-no-revision-deployment", nginxImageName
	deploymentReplicas := 1
	deploymentImage := nginxImage
	deploymentStrategyType := extensions.RollingUpdateDeploymentStrategyType
	framework.Logf("Creating deployment %s", deploymentName)
	d := newDeployment(deploymentName, deploymentReplicas, deploymentPodLabels, deploymentImageName, deploymentImage, deploymentStrategyType, nil)
	_, err = c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "1", deploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, deploymentReplicas, deploymentReplicas-1, deploymentReplicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	// Check that the replica set we created still doesn't contain revision information
	rs, err = c.Extensions().ReplicaSets(ns).Get(rsName)
	Expect(err).NotTo(HaveOccurred())
	Expect(rs.Annotations[deploymentutil.RevisionAnnotation]).Should(Equal(""))

	// 2. Update the deploymentRollback to rollback to last revision
	//    Since there's only 1 revision in history, it should stay as revision 1
	revision := int64(0)
	framework.Logf("rolling back deployment %s to last revision", deploymentName)
	rollback := newDeploymentRollback(deploymentName, nil, revision)
	err = c.Extensions().Deployments(ns).Rollback(rollback)
	Expect(err).NotTo(HaveOccurred())

	// Wait for the deployment to start rolling back
	err = framework.WaitForDeploymentRollbackCleared(c, ns, deploymentName)
	Expect(err).NotTo(HaveOccurred())
	// TODO: report RollbackRevisionNotFound in deployment status and check it here

	// The pod template shouldn't change since there's no last revision
	// Check if the deployment is still revision 1 and still has the old pod template
	checkDeploymentRevision(c, ns, deploymentName, "1", deploymentImageName, deploymentImage)

	// 3. Update the deployment to create redis pods.
	updatedDeploymentImage := redisImage
	updatedDeploymentImageName := redisImageName
	deployment, err := framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Template.Spec.Containers[0].Name = updatedDeploymentImageName
		update.Spec.Template.Spec.Containers[0].Image = updatedDeploymentImage
	})
	Expect(err).NotTo(HaveOccurred())

	// Use observedGeneration to determine if the controller noticed the pod template update.
	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	// Wait for it to be updated to revision 2
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "2", updatedDeploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, deploymentReplicas, deploymentReplicas-1, deploymentReplicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	// 4. Update the deploymentRollback to rollback to revision 1
	revision = 1
	framework.Logf("rolling back deployment %s to revision %d", deploymentName, revision)
	rollback = newDeploymentRollback(deploymentName, nil, revision)
	err = c.Extensions().Deployments(ns).Rollback(rollback)
	Expect(err).NotTo(HaveOccurred())

	// Wait for the deployment to start rolling back
	err = framework.WaitForDeploymentRollbackCleared(c, ns, deploymentName)
	Expect(err).NotTo(HaveOccurred())
	// TODO: report RollbackDone in deployment status and check it here

	// The pod template should be updated to the one in revision 1
	// Wait for it to be updated to revision 3
//.........这里部分代码省略.........

// testRollbackDeployment tests that a deployment is created (revision 1) and updated (revision 2), and
// then rollback to revision 1 (should update template to revision 1, and then update revision 1 to 3),
// and then rollback to last revision.
func testRollbackDeployment(f *framework.Framework) {
	ns := f.Namespace.Name
	unversionedClient := f.Client
	c := adapter.FromUnversionedClient(unversionedClient)
	podName := "nginx"
	deploymentPodLabels := map[string]string{"name": podName}

	// 1. Create a deployment to create nginx pods.
	deploymentName, deploymentImageName := "test-rollback-deployment", nginxImageName
	deploymentReplicas := 1
	deploymentImage := nginxImage
	deploymentStrategyType := extensions.RollingUpdateDeploymentStrategyType
	framework.Logf("Creating deployment %s", deploymentName)
	d := newDeployment(deploymentName, deploymentReplicas, deploymentPodLabels, deploymentImageName, deploymentImage, deploymentStrategyType, nil)
	createAnnotation := map[string]string{"action": "create", "author": "minion"}
	d.Annotations = createAnnotation
	_, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "1", deploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, deploymentReplicas, deploymentReplicas-1, deploymentReplicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	// Current newRS annotation should be "create"
	err = framework.CheckNewRSAnnotations(c, ns, deploymentName, createAnnotation)
	Expect(err).NotTo(HaveOccurred())

	// 2. Update the deployment to create redis pods.
	updatedDeploymentImage := redisImage
	updatedDeploymentImageName := redisImageName
	updateAnnotation := map[string]string{"action": "update", "log": "I need to update it"}
	deployment, err := framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Template.Spec.Containers[0].Name = updatedDeploymentImageName
		update.Spec.Template.Spec.Containers[0].Image = updatedDeploymentImage
		update.Annotations = updateAnnotation
	})
	Expect(err).NotTo(HaveOccurred())

	// Use observedGeneration to determine if the controller noticed the pod template update.
	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	// Wait for it to be updated to revision 2
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "2", updatedDeploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, deploymentReplicas, deploymentReplicas-1, deploymentReplicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	// Current newRS annotation should be "update"
	err = framework.CheckNewRSAnnotations(c, ns, deploymentName, updateAnnotation)
	Expect(err).NotTo(HaveOccurred())

	// 3. Update the deploymentRollback to rollback to revision 1
	revision := int64(1)
	framework.Logf("rolling back deployment %s to revision %d", deploymentName, revision)
	rollback := newDeploymentRollback(deploymentName, nil, revision)
	err = c.Extensions().Deployments(ns).Rollback(rollback)
	Expect(err).NotTo(HaveOccurred())

	// Wait for the deployment to start rolling back
	err = framework.WaitForDeploymentRollbackCleared(c, ns, deploymentName)
	Expect(err).NotTo(HaveOccurred())
	// TODO: report RollbackDone in deployment status and check it here

	// Wait for it to be updated to revision 3
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "3", deploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, deploymentReplicas, deploymentReplicas-1, deploymentReplicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

	// Current newRS annotation should be "create", after the rollback
	err = framework.CheckNewRSAnnotations(c, ns, deploymentName, createAnnotation)
	Expect(err).NotTo(HaveOccurred())

	// 4. Update the deploymentRollback to rollback to last revision
	revision = 0
	framework.Logf("rolling back deployment %s to last revision", deploymentName)
	rollback = newDeploymentRollback(deploymentName, nil, revision)
	err = c.Extensions().Deployments(ns).Rollback(rollback)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentRollbackCleared(c, ns, deploymentName)
	Expect(err).NotTo(HaveOccurred())

	// Wait for it to be updated to revision 4
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "4", updatedDeploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, deploymentReplicas, deploymentReplicas-1, deploymentReplicas+1, 0)
	Expect(err).NotTo(HaveOccurred())

//.........这里部分代码省略.........

// testRolloverDeployment tests that deployment supports rollover.
// i.e. we can change desired state and kick off rolling update, then change desired state again before it finishes.
func testRolloverDeployment(f *framework.Framework) {
	ns := f.Namespace.Name
	// TODO: remove unversionedClient when the refactoring is done. Currently some
	// functions like verifyPod still expects a unversioned#Client.
	unversionedClient := f.Client
	c := adapter.FromUnversionedClient(unversionedClient)
	podName := "rollover-pod"
	deploymentPodLabels := map[string]string{"name": podName}
	rsPodLabels := map[string]string{
		"name": podName,
		"pod":  nginxImageName,
	}

	rsName := "test-rollover-controller"
	rsReplicas := 4
	_, err := c.Extensions().ReplicaSets(ns).Create(newRS(rsName, rsReplicas, rsPodLabels, nginxImageName, nginxImage))
	Expect(err).NotTo(HaveOccurred())
	// Verify that the required pods have come up.
	err = framework.VerifyPods(unversionedClient, ns, podName, false, rsReplicas)
	if err != nil {
		framework.Logf("error in waiting for pods to come up: %s", err)
		Expect(err).NotTo(HaveOccurred())
	}
	// Wait for the required pods to be ready for at least minReadySeconds (be available)
	deploymentMinReadySeconds := 5
	err = framework.WaitForPodsReady(c, ns, podName, deploymentMinReadySeconds)
	Expect(err).NotTo(HaveOccurred())

	// Create a deployment to delete nginx pods and instead bring up redis-slave pods.
	deploymentName, deploymentImageName := "test-rollover-deployment", "redis-slave"
	deploymentReplicas := 4
	deploymentImage := "gcr.io/google_samples/gb-redisslave:v1"
	deploymentStrategyType := extensions.RollingUpdateDeploymentStrategyType
	framework.Logf("Creating deployment %s", deploymentName)
	newDeployment := newDeployment(deploymentName, deploymentReplicas, deploymentPodLabels, deploymentImageName, deploymentImage, deploymentStrategyType, nil)
	newDeployment.Spec.MinReadySeconds = deploymentMinReadySeconds
	newDeployment.Spec.Strategy.RollingUpdate = &extensions.RollingUpdateDeployment{
		MaxUnavailable: intstr.FromInt(1),
		MaxSurge:       intstr.FromInt(1),
	}
	_, err = c.Extensions().Deployments(ns).Create(newDeployment)
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Verify that the pods were scaled up and down as expected. We use events to verify that.
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())
	// Make sure the deployment starts to scale up and down replica sets
	framework.WaitForPartialEvents(unversionedClient, ns, deployment, 2)
	// Check if it's updated to revision 1 correctly
	_, newRS := checkDeploymentRevision(c, ns, deploymentName, "1", deploymentImageName, deploymentImage)

	// Before the deployment finishes, update the deployment to rollover the above 2 ReplicaSets and bring up redis pods.
	// If the deployment already finished here, the test would fail. When this happens, increase its minReadySeconds or replicas to prevent it.
	Expect(newRS.Spec.Replicas).Should(BeNumerically("<", deploymentReplicas))
	updatedDeploymentImageName, updatedDeploymentImage := redisImageName, redisImage
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, newDeployment.Name, func(update *extensions.Deployment) {
		update.Spec.Template.Spec.Containers[0].Name = updatedDeploymentImageName
		update.Spec.Template.Spec.Containers[0].Image = updatedDeploymentImage
	})
	Expect(err).NotTo(HaveOccurred())

	// Use observedGeneration to determine if the controller noticed the pod template update.
	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	// Wait for it to be updated to revision 2
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "2", updatedDeploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, ns, deploymentName, deploymentReplicas, deploymentReplicas-1, deploymentReplicas+1, deploymentMinReadySeconds)
	Expect(err).NotTo(HaveOccurred())
}