/*
Copyright 2015 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 e2e

import (
	"fmt"
	"strings"
	"time"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	"k8s.io/kubernetes/pkg/api"
	"k8s.io/kubernetes/pkg/api/annotations"
	"k8s.io/kubernetes/pkg/api/errors"
	"k8s.io/kubernetes/pkg/api/unversioned"
	"k8s.io/kubernetes/pkg/apis/extensions"
	clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
	client "k8s.io/kubernetes/pkg/client/unversioned"
	adapter "k8s.io/kubernetes/pkg/client/unversioned/adapters/internalclientset"
	deploymentutil "k8s.io/kubernetes/pkg/controller/deployment/util"
	"k8s.io/kubernetes/pkg/kubectl"
	"k8s.io/kubernetes/pkg/labels"
	"k8s.io/kubernetes/pkg/util"
	"k8s.io/kubernetes/pkg/util/intstr"
	"k8s.io/kubernetes/pkg/util/wait"
	"k8s.io/kubernetes/pkg/watch"
	"k8s.io/kubernetes/test/e2e/framework"
)

const (
	// nginxImage defined in kubectl.go
	nginxImageName = "nginx"
	redisImage     = "gcr.io/google_containers/redis:e2e"
	redisImageName = "redis"
)

var _ = framework.KubeDescribe("Deployment", func() {
	f := framework.NewDefaultFramework("deployment")

	It("deployment should create new pods", func() {
		testNewDeployment(f)
	})
	It("RollingUpdateDeployment should delete old pods and create new ones", func() {
		testRollingUpdateDeployment(f)
	})
	It("RollingUpdateDeployment should scale up and down in the right order", func() {
		testRollingUpdateDeploymentEvents(f)
	})
	It("RecreateDeployment should delete old pods and create new ones", func() {
		testRecreateDeployment(f)
	})
	It("deployment should delete old replica sets", func() {
		testDeploymentCleanUpPolicy(f)
	})
	It("deployment should support rollover", func() {
		testRolloverDeployment(f)
	})
	It("paused deployment should be ignored by the controller", func() {
		testPausedDeployment(f)
	})
	It("deployment should support rollback", func() {
		testRollbackDeployment(f)
	})
	It("deployment should support rollback when there's replica set with no revision", func() {
		testRollbackDeploymentRSNoRevision(f)
	})
	It("deployment should label adopted RSs and pods", func() {
		testDeploymentLabelAdopted(f)
	})
	It("paused deployment should be able to scale", func() {
		testScalePausedDeployment(f)
	})
	It("scaled rollout deployment should not block on annotation check", func() {
		testScaledRolloutDeployment(f)
	})
	It("overlapping deployment should not fight with each other", func() {
		testOverlappingDeployment(f)
	})
	// TODO: add tests that cover deployment.Spec.MinReadySeconds once we solved clock-skew issues
})

func newRS(rsName string, replicas int32, rsPodLabels map[string]string, imageName string, image string) *extensions.ReplicaSet {
	zero := int64(0)
	return &extensions.ReplicaSet{
		ObjectMeta: api.ObjectMeta{
			Name: rsName,
		},
		Spec: extensions.ReplicaSetSpec{
			Replicas: replicas,
			Selector: &unversioned.LabelSelector{MatchLabels: rsPodLabels},
			Template: api.PodTemplateSpec{
				ObjectMeta: api.ObjectMeta{
					Labels: rsPodLabels,
				},
				Spec: api.PodSpec{
					TerminationGracePeriodSeconds: &zero,
					Containers: []api.Container{
						{
							Name:  imageName,
							Image: image,
						},
					},
				},
			},
		},
	}
}

func newDeployment(deploymentName string, replicas int32, podLabels map[string]string, imageName string, image string, strategyType extensions.DeploymentStrategyType, revisionHistoryLimit *int32) *extensions.Deployment {
	zero := int64(0)
	return &extensions.Deployment{
		ObjectMeta: api.ObjectMeta{
			Name: deploymentName,
		},
		Spec: extensions.DeploymentSpec{
			Replicas: replicas,
			Selector: &unversioned.LabelSelector{MatchLabels: podLabels},
			Strategy: extensions.DeploymentStrategy{
				Type: strategyType,
			},
			RevisionHistoryLimit: revisionHistoryLimit,
			Template: api.PodTemplateSpec{
				ObjectMeta: api.ObjectMeta{
					Labels: podLabels,
				},
				Spec: api.PodSpec{
					TerminationGracePeriodSeconds: &zero,
					Containers: []api.Container{
						{
							Name:  imageName,
							Image: image,
						},
					},
				},
			},
		},
	}
}

func newDeploymentRollback(name string, annotations map[string]string, revision int64) *extensions.DeploymentRollback {
	return &extensions.DeploymentRollback{
		Name:               name,
		UpdatedAnnotations: annotations,
		RollbackTo:         extensions.RollbackConfig{Revision: revision},
	}
}

// checkDeploymentRevision checks if the input deployment's and its new replica set's revision and images are as expected.
func checkDeploymentRevision(c *clientset.Clientset, ns, deploymentName, revision, imageName, image string) (*extensions.Deployment, *extensions.ReplicaSet) {
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())
	// Check revision of the new replica set of this deployment
	newRS, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	Expect(newRS.Annotations).NotTo(Equal(nil))
	Expect(newRS.Annotations[deploymentutil.RevisionAnnotation]).Should(Equal(revision))
	// Check revision of This deployment
	Expect(deployment.Annotations).NotTo(Equal(nil))
	Expect(deployment.Annotations[deploymentutil.RevisionAnnotation]).Should(Equal(revision))
	if len(imageName) > 0 {
		// Check the image the new replica set creates
		Expect(newRS.Spec.Template.Spec.Containers[0].Name).Should(Equal(imageName))
		Expect(newRS.Spec.Template.Spec.Containers[0].Image).Should(Equal(image))
		// Check the image the deployment creates
		Expect(deployment.Spec.Template.Spec.Containers[0].Name).Should(Equal(imageName))
		Expect(deployment.Spec.Template.Spec.Containers[0].Image).Should(Equal(image))
	}
	return deployment, newRS
}

func stopDeploymentOverlap(c *clientset.Clientset, oldC client.Interface, ns, deploymentName, overlapWith string) {
	stopDeploymentMaybeOverlap(c, oldC, ns, deploymentName, overlapWith)
}

func stopDeployment(c *clientset.Clientset, oldC client.Interface, ns, deploymentName string) {
	stopDeploymentMaybeOverlap(c, oldC, ns, deploymentName, "")
}

func stopDeploymentMaybeOverlap(c *clientset.Clientset, oldC client.Interface, ns, deploymentName, overlapWith string) {
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())

	framework.Logf("Deleting deployment %s", deploymentName)
	reaper, err := kubectl.ReaperFor(extensions.Kind("Deployment"), oldC)
	Expect(err).NotTo(HaveOccurred())
	timeout := 1 * time.Minute
	err = reaper.Stop(ns, deployment.Name, timeout, api.NewDeleteOptions(0))
	Expect(err).NotTo(HaveOccurred())

	framework.Logf("Ensuring deployment %s was deleted", deploymentName)
	_, err = c.Extensions().Deployments(ns).Get(deployment.Name)
	Expect(err).To(HaveOccurred())
	Expect(errors.IsNotFound(err)).To(BeTrue())
	framework.Logf("Ensuring deployment %s's RSes were deleted", deploymentName)
	selector, err := unversioned.LabelSelectorAsSelector(deployment.Spec.Selector)
	Expect(err).NotTo(HaveOccurred())
	options := api.ListOptions{LabelSelector: selector}
	rss, err := c.Extensions().ReplicaSets(ns).List(options)
	Expect(err).NotTo(HaveOccurred())
	// RSes may be created by overlapping deployments right after this deployment is deleted, ignore them
	if len(overlapWith) == 0 {
		Expect(rss.Items).Should(HaveLen(0))
	} else {
		noOverlapRSes := []extensions.ReplicaSet{}
		for _, rs := range rss.Items {
			if !strings.HasPrefix(rs.Name, overlapWith) {
				noOverlapRSes = append(noOverlapRSes, rs)
			}
		}
		Expect(noOverlapRSes).Should(HaveLen(0))
	}
	framework.Logf("Ensuring deployment %s's Pods were deleted", deploymentName)
	var pods *api.PodList
	if err := wait.PollImmediate(time.Second, timeout, func() (bool, error) {
		pods, err = c.Core().Pods(ns).List(options)
		if err != nil {
			return false, err
		}
		// Pods may be created by overlapping deployments right after this deployment is deleted, ignore them
		if len(overlapWith) == 0 && len(pods.Items) == 0 {
			return true, nil
		} else if len(overlapWith) != 0 {
			noOverlapPods := []api.Pod{}
			for _, pod := range pods.Items {
				if !strings.HasPrefix(pod.Name, overlapWith) {
					noOverlapPods = append(noOverlapPods, pod)
				}
			}
			if len(noOverlapPods) == 0 {
				return true, nil
			}
		}
		return false, nil
	}); err != nil {
		framework.Failf("Err : %s\n. Failed to remove deployment %s pods : %+v", err, deploymentName, pods)
	}
}

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 := int32(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", annotations.LastAppliedConfigAnnotation: "should-not-copy-to-replica-set"}
	deploy, 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, deploy)
	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[annotations.LastAppliedConfigAnnotation]).Should(Equal(""))
	Expect(deployment.Annotations["test"]).Should(Equal("should-copy-to-replica-set"))
	Expect(deployment.Annotations[annotations.LastAppliedConfigAnnotation]).Should(Equal("should-not-copy-to-replica-set"))
}

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 := int32(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)
	deploy, 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, deploy)
	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))
}

func testRollingUpdateDeploymentEvents(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-2"}
	rsPodLabels := map[string]string{
		"name": "sample-pod-2",
		"pod":  nginxImageName,
	}
	rsName := "test-rolling-scale-controller"
	replicas := int32(1)

	rsRevision := "3546343826724305832"
	annotations := make(map[string]string)
	annotations[deploymentutil.RevisionAnnotation] = rsRevision
	rs := newRS(rsName, replicas, rsPodLabels, nginxImageName, nginxImage)
	rs.Annotations = annotations

	_, err := c.Extensions().ReplicaSets(ns).Create(rs)
	Expect(err).NotTo(HaveOccurred())
	// Verify that the required pods have come up.
	err = framework.VerifyPods(unversionedClient, ns, "sample-pod-2", false, 1)
	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-scale-deployment"
	framework.Logf("Creating deployment %s", deploymentName)
	deploy, 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 3546343826724305833
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "3546343826724305833", redisImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, deploy)
	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 up replica set %s to 1", newRS.Name)))
	Expect(events.Items[1].Message).Should(Equal(fmt.Sprintf("Scaled down replica set %s to 0", rsName)))
}

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 := int32(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)
	deploy, 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, deploy)
	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)))
}

// testDeploymentCleanUpPolicy tests that deployment supports cleanup policy
func testDeploymentCleanUpPolicy(f *framework.Framework) {
	ns := f.Namespace.Name
	unversionedClient := f.Client
	c := adapter.FromUnversionedClient(unversionedClient)
	// Create nginx pods.
	deploymentPodLabels := map[string]string{"name": "cleanup-pod"}
	rsPodLabels := map[string]string{
		"name": "cleanup-pod",
		"pod":  nginxImageName,
	}
	rsName := "test-cleanup-controller"
	replicas := int32(1)
	revisionHistoryLimit := util.Int32Ptr(0)
	_, 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, "cleanup-pod", false, 1)
	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-cleanup-deployment"
	framework.Logf("Creating deployment %s", deploymentName)

	pods, err := c.Pods(ns).List(api.ListOptions{LabelSelector: labels.Everything()})
	if err != nil {
		Expect(err).NotTo(HaveOccurred(), "Failed to query for pods: %v", err)
	}
	options := api.ListOptions{
		ResourceVersion: pods.ListMeta.ResourceVersion,
	}
	stopCh := make(chan struct{})
	w, err := c.Pods(ns).Watch(options)
	go func() {
		// There should be only one pod being created, which is the pod with the redis image.
		// The old RS shouldn't create new pod when deployment controller adding pod template hash label to its selector.
		numPodCreation := 1
		for {
			select {
			case event, _ := <-w.ResultChan():
				if event.Type != watch.Added {
					continue
				}
				numPodCreation--
				if numPodCreation < 0 {
					framework.Failf("Expect only one pod creation, the second creation event: %#v\n", event)
				}
				pod, ok := event.Object.(*api.Pod)
				if !ok {
					Fail("Expect event Object to be a pod")
				}
				if pod.Spec.Containers[0].Name != redisImageName {
					framework.Failf("Expect the created pod to have container name %s, got pod %#v\n", redisImageName, pod)
				}
			case <-stopCh:
				return
			}
		}
	}()
	_, err = c.Extensions().Deployments(ns).Create(newDeployment(deploymentName, replicas, deploymentPodLabels, redisImageName, redisImage, extensions.RollingUpdateDeploymentStrategyType, revisionHistoryLimit))
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	err = framework.WaitForDeploymentOldRSsNum(c, ns, deploymentName, int(*revisionHistoryLimit))
	Expect(err).NotTo(HaveOccurred())
	close(stopCh)
}

// 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 := int32(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())
	}

	// Create a deployment to delete nginx pods and instead bring up redis-slave pods.
	// We use a nonexistent image here, so that we make sure it won't finish
	deploymentName, deploymentImageName := "test-rollover-deployment", "redis-slave"
	deploymentReplicas := int32(4)
	deploymentImage := "gcr.io/google_samples/gb-redisslave:nonexistent"
	deploymentStrategyType := extensions.RollingUpdateDeploymentStrategyType
	framework.Logf("Creating deployment %s", deploymentName)
	newDeployment := newDeployment(deploymentName, deploymentReplicas, deploymentPodLabels, deploymentImageName, deploymentImage, deploymentStrategyType, nil)
	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.
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())
	// Make sure the deployment starts to scale up and down replica sets by checking if its updated replicas >= 1
	err = framework.WaitForDeploymentUpdatedReplicasLTE(c, ns, deploymentName, 1, deployment.Generation)
	// 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.
	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, deployment)
	Expect(err).NotTo(HaveOccurred())
}

func testPausedDeployment(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)
	deploymentName := "test-paused-deployment"
	podLabels := map[string]string{"name": nginxImageName}
	d := newDeployment(deploymentName, 1, podLabels, nginxImageName, nginxImage, extensions.RollingUpdateDeploymentStrategyType, nil)
	d.Spec.Paused = true
	tgps := int64(20)
	d.Spec.Template.Spec.TerminationGracePeriodSeconds = &tgps
	framework.Logf("Creating paused deployment %s", deploymentName)
	_, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)
	// Check that deployment is created fine.
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())

	// Verify that there is no latest state realized for the new deployment.
	rs, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	if rs != nil {
		err = fmt.Errorf("unexpected new rs/%s for deployment/%s", rs.Name, deployment.Name)
		Expect(err).NotTo(HaveOccurred())
	}

	// Update the deployment to run
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Paused = false
	})
	Expect(err).NotTo(HaveOccurred())

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

	selector, err := unversioned.LabelSelectorAsSelector(deployment.Spec.Selector)
	if err != nil {
		Expect(err).NotTo(HaveOccurred())
	}
	opts := api.ListOptions{LabelSelector: selector}
	w, err := c.Extensions().ReplicaSets(ns).Watch(opts)
	Expect(err).NotTo(HaveOccurred())

	select {
	case <-w.ResultChan():
		// this is it
	case <-time.After(time.Minute):
		err = fmt.Errorf("expected a new replica set to be created")
		Expect(err).NotTo(HaveOccurred())
	}

	// Pause the deployment and delete the replica set.
	// The paused deployment shouldn't recreate a new one.
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Paused = true
	})
	Expect(err).NotTo(HaveOccurred())

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

	// Update the deployment template - the new replicaset should stay the same
	framework.Logf("Updating paused deployment %q", deploymentName)
	newTGPS := int64(40)
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Template.Spec.TerminationGracePeriodSeconds = &newTGPS
	})
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	framework.Logf("Looking for new replicaset for paused deployment %q (there should be none)", deploymentName)
	newRS, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	if newRS != nil {
		err = fmt.Errorf("No replica set should match the deployment template but there is %q", newRS.Name)
		Expect(err).NotTo(HaveOccurred())
	}

	_, allOldRs, err := deploymentutil.GetOldReplicaSets(deployment, c)
	Expect(err).NotTo(HaveOccurred())
	if len(allOldRs) != 1 {
		err = fmt.Errorf("expected an old replica set")
		Expect(err).NotTo(HaveOccurred())
	}
	framework.Logf("Comparing deployment diff with old replica set %q", allOldRs[0].Name)
	if *allOldRs[0].Spec.Template.Spec.TerminationGracePeriodSeconds == newTGPS {
		err = fmt.Errorf("TerminationGracePeriodSeconds on the replica set should be %d but is %d", tgps, newTGPS)
		Expect(err).NotTo(HaveOccurred())
	}
}

// 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 := int32(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
	deploy, 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, deploy)
	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, deployment)
	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, deployment)
	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, deployment)
	Expect(err).NotTo(HaveOccurred())

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

// 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 := int32(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 := int32(1)
	deploymentImage := nginxImage
	deploymentStrategyType := extensions.RollingUpdateDeploymentStrategyType
	framework.Logf("Creating deployment %s", deploymentName)
	d := newDeployment(deploymentName, deploymentReplicas, deploymentPodLabels, deploymentImageName, deploymentImage, deploymentStrategyType, nil)
	deploy, 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, deploy)
	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, deployment)
	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
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "3", deploymentImage)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForDeploymentStatus(c, deployment)
	Expect(err).NotTo(HaveOccurred())

	// 5. Update the deploymentRollback to rollback to revision 10
	//    Since there's no revision 10 in history, it should stay as revision 3
	revision = 10
	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 RollbackRevisionNotFound in deployment status and check it here

	// The pod template shouldn't change since there's no revision 10
	// Check if it's still revision 3 and still has the old pod template
	checkDeploymentRevision(c, ns, deploymentName, "3", deploymentImageName, deploymentImage)

	// 6. Update the deploymentRollback to rollback to revision 3
	//    Since it's already revision 3, it should be no-op
	revision = 3
	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 RollbackTemplateUnchanged in deployment status and check it here

	// The pod template shouldn't change since it's already revision 3
	// Check if it's still revision 3 and still has the old pod template
	checkDeploymentRevision(c, ns, deploymentName, "3", deploymentImageName, deploymentImage)
}

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 := int32(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)
	deploy, 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, deploy)
	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, newRS, err := deploymentutil.GetAllReplicaSets(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
	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(int32(len(pods.Items))).Should(Equal(replicas))
}

func testScalePausedDeployment(f *framework.Framework) {
	ns := f.Namespace.Name
	c := adapter.FromUnversionedClient(f.Client)

	podLabels := map[string]string{"name": nginxImageName}
	replicas := int32(3)

	// Create a nginx deployment.
	deploymentName := "nginx-deployment"
	d := newDeployment(deploymentName, replicas, podLabels, nginxImageName, nginxImage, extensions.RollingUpdateDeploymentStrategyType, nil)
	framework.Logf("Creating deployment %q", deploymentName)
	_, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Check that deployment is created fine.
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	rs, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())

	// Pause the deployment and try to scale it.
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Paused = true
	})
	Expect(err).NotTo(HaveOccurred())

	// Scale the paused deployment.
	framework.Logf("Scaling up the paused deployment %q", deploymentName)
	newReplicas := int32(5)
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, deployment.Name, func(update *extensions.Deployment) {
		update.Spec.Replicas = newReplicas
	})
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	rs, err = deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())

	if rs.Spec.Replicas != newReplicas {
		err = fmt.Errorf("Expected %d replicas for the new replica set, got %d", newReplicas, rs.Spec.Replicas)
		Expect(err).NotTo(HaveOccurred())
	}
}

func testScaledRolloutDeployment(f *framework.Framework) {
	ns := f.Namespace.Name
	c := adapter.FromUnversionedClient(f.Client)

	podLabels := map[string]string{"name": nginxImageName}
	replicas := int32(10)

	// Create a nginx deployment.
	deploymentName := "nginx"
	d := newDeployment(deploymentName, replicas, podLabels, nginxImageName, nginxImage, extensions.RollingUpdateDeploymentStrategyType, nil)
	d.Spec.Strategy.RollingUpdate = new(extensions.RollingUpdateDeployment)
	d.Spec.Strategy.RollingUpdate.MaxSurge = intstr.FromInt(3)
	d.Spec.Strategy.RollingUpdate.MaxUnavailable = intstr.FromInt(2)
	By(fmt.Sprintf("Creating deployment %q", deploymentName))
	_, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred())
	defer stopDeployment(c, f.Client, ns, deploymentName)

	// Check that deployment is created fine.
	deployment, err := c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())

	By(fmt.Sprintf("Waiting for observed generation %d", deployment.Generation))
	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	deployment, err = c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())

	// Verify that the required pods have come up.
	By("Waiting for all required pods to come up")
	err = framework.VerifyPods(f.Client, ns, nginxImageName, false, deployment.Spec.Replicas)
	if err != nil {
		framework.Logf("error in waiting for pods to come up: %s", err)
		Expect(err).NotTo(HaveOccurred())
	}
	err = framework.WaitForDeploymentStatus(c, deployment)
	Expect(err).NotTo(HaveOccurred())

	first, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())

	// Update the deployment with a non-existent image so that the new replica set will be blocked.
	By(fmt.Sprintf("Updating deployment %q with a non-existent image", deploymentName))
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Template.Spec.Containers[0].Image = "nginx:404"
	})
	Expect(err).NotTo(HaveOccurred())

	By(fmt.Sprintf("Waiting for observed generation %d", deployment.Generation))
	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	deployment, err = c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())

	if deployment.Status.AvailableReplicas < deploymentutil.MinAvailable(deployment) {
		Expect(fmt.Errorf("Observed %d available replicas, less than min required %d", deployment.Status.AvailableReplicas, deploymentutil.MinAvailable(deployment))).NotTo(HaveOccurred())
	}

	By(fmt.Sprintf("Checking that the replica sets for %q are synced", deploymentName))
	second, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())

	first, err = c.Extensions().ReplicaSets(first.Namespace).Get(first.Name)
	Expect(err).NotTo(HaveOccurred())

	firstCond := client.ReplicaSetHasDesiredReplicas(f.Client.Extensions(), first)
	wait.PollImmediate(10*time.Millisecond, 1*time.Minute, firstCond)

	secondCond := client.ReplicaSetHasDesiredReplicas(f.Client.Extensions(), second)
	wait.PollImmediate(10*time.Millisecond, 1*time.Minute, secondCond)

	By(fmt.Sprintf("Updating the size (up) and template at the same time for deployment %q", deploymentName))
	newReplicas := int32(20)
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, deployment.Name, func(update *extensions.Deployment) {
		update.Spec.Replicas = newReplicas
		update.Spec.Template.Spec.Containers[0].Image = nautilusImage
	})
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	oldRSs, _, rs, err := deploymentutil.GetAllReplicaSets(deployment, c)
	Expect(err).NotTo(HaveOccurred())

	for _, rs := range append(oldRSs, rs) {
		By(fmt.Sprintf("Ensuring replica set %q has the correct desiredReplicas annotation", rs.Name))
		desired, ok := deploymentutil.GetDesiredReplicasAnnotation(rs)
		if !ok || desired == deployment.Spec.Replicas {
			continue
		}
		err = fmt.Errorf("unexpected desiredReplicas annotation %d for replica set %q", desired, rs.Name)
		Expect(err).NotTo(HaveOccurred())
	}

	By(fmt.Sprintf("Waiting for deployment status to sync (current available: %d, minimum available: %d)", deployment.Status.AvailableReplicas, deploymentutil.MinAvailable(deployment)))
	err = framework.WaitForDeploymentStatusValid(c, deployment)
	Expect(err).NotTo(HaveOccurred())
	err = framework.WaitForDeploymentStatus(c, deployment)
	Expect(err).NotTo(HaveOccurred())

	// Update the deployment with a non-existent image so that the new replica set will be blocked.
	By(fmt.Sprintf("Updating deployment %q with a non-existent image", deploymentName))
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, d.Name, func(update *extensions.Deployment) {
		update.Spec.Template.Spec.Containers[0].Image = "nginx:404"
	})
	Expect(err).NotTo(HaveOccurred())

	By(fmt.Sprintf("Waiting for observed generation %d", deployment.Generation))
	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	deployment, err = c.Extensions().Deployments(ns).Get(deploymentName)
	Expect(err).NotTo(HaveOccurred())

	if deployment.Status.AvailableReplicas < deploymentutil.MinAvailable(deployment) {
		Expect(fmt.Errorf("Observed %d available replicas, less than min required %d", deployment.Status.AvailableReplicas, deploymentutil.MinAvailable(deployment))).NotTo(HaveOccurred())
	}

	By(fmt.Sprintf("Checking that the replica sets for %q are synced", deploymentName))
	oldRs, err := c.Extensions().ReplicaSets(rs.Namespace).Get(rs.Name)
	Expect(err).NotTo(HaveOccurred())

	newRs, err := deploymentutil.GetNewReplicaSet(deployment, c)
	Expect(err).NotTo(HaveOccurred())

	oldCond := client.ReplicaSetHasDesiredReplicas(f.Client.Extensions(), oldRs)
	wait.PollImmediate(10*time.Millisecond, 1*time.Minute, oldCond)

	newCond := client.ReplicaSetHasDesiredReplicas(f.Client.Extensions(), newRs)
	wait.PollImmediate(10*time.Millisecond, 1*time.Minute, newCond)

	By(fmt.Sprintf("Updating the size (down) and template at the same time for deployment %q", deploymentName))
	newReplicas = int32(5)
	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, deployment.Name, func(update *extensions.Deployment) {
		update.Spec.Replicas = newReplicas
		update.Spec.Template.Spec.Containers[0].Image = kittenImage
	})
	Expect(err).NotTo(HaveOccurred())

	err = framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation)
	Expect(err).NotTo(HaveOccurred())

	oldRSs, _, rs, err = deploymentutil.GetAllReplicaSets(deployment, c)
	Expect(err).NotTo(HaveOccurred())

	for _, rs := range append(oldRSs, rs) {
		By(fmt.Sprintf("Ensuring replica set %q has the correct desiredReplicas annotation", rs.Name))
		desired, ok := deploymentutil.GetDesiredReplicasAnnotation(rs)
		if !ok || desired == deployment.Spec.Replicas {
			continue
		}
		err = fmt.Errorf("unexpected desiredReplicas annotation %d for replica set %q", desired, rs.Name)
		Expect(err).NotTo(HaveOccurred())
	}

	By(fmt.Sprintf("Waiting for deployment status to sync (current available: %d, minimum available: %d)", deployment.Status.AvailableReplicas, deploymentutil.MinAvailable(deployment)))
	err = framework.WaitForDeploymentStatusValid(c, deployment)
	Expect(err).NotTo(HaveOccurred())
	err = framework.WaitForDeploymentStatus(c, deployment)
	Expect(err).NotTo(HaveOccurred())
}

func testOverlappingDeployment(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 := "first-deployment"
	podLabels := map[string]string{"name": redisImageName}
	replicas := int32(1)
	By(fmt.Sprintf("Creating deployment %q", deploymentName))
	d := newDeployment(deploymentName, replicas, podLabels, redisImageName, redisImage, extensions.RollingUpdateDeploymentStrategyType, nil)
	deploy, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred(), "Failed creating the first deployment")

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploy.Name, "1", redisImage)
	Expect(err).NotTo(HaveOccurred(), "The first deployment failed to update to revision 1")

	Expect(err).NotTo(HaveOccurred())
	deploymentName = "second-deployment"
	By(fmt.Sprintf("Creating deployment %q with overlapping selector", deploymentName))
	d = newDeployment(deploymentName, replicas, podLabels, nginxImageName, nginxImage, extensions.RollingUpdateDeploymentStrategyType, nil)
	deployOverlapping, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred(), "Failed creating the second deployment")
	defer stopDeployment(c, f.Client, ns, deployOverlapping.Name)

	// Wait for overlapping annotation updated to both deployments
	By("Waiting for both deployments to have overlapping annotations")
	err = framework.WaitForOverlappingAnnotationMatch(c, ns, deploy.Name, deployOverlapping.Name)
	Expect(err).NotTo(HaveOccurred(), "Failed to update the first deployment's overlapping annotation")
	err = framework.WaitForOverlappingAnnotationMatch(c, ns, deployOverlapping.Name, deploy.Name)
	Expect(err).NotTo(HaveOccurred(), "Failed to update the second deployment's overlapping annotation")

	// Only the first deployment is synced
	By("Checking only the first overlapping deployment is synced")
	options := api.ListOptions{}
	rsList, err := c.Extensions().ReplicaSets(ns).List(options)
	Expect(err).NotTo(HaveOccurred(), "Failed listing all replica sets in namespace %s", ns)
	Expect(rsList.Items).To(HaveLen(int(replicas)))
	Expect(rsList.Items[0].Spec.Template.Spec.Containers).To(HaveLen(1))
	Expect(rsList.Items[0].Spec.Template.Spec.Containers[0].Image).To(Equal(deploy.Spec.Template.Spec.Containers[0].Image))

	By("Deleting the first deployment")
	stopDeploymentOverlap(c, f.Client, ns, deploy.Name, deployOverlapping.Name)

	// Wait for overlapping annotation cleared
	By("Waiting for the second deployment to clear overlapping annotation")
	err = framework.WaitForOverlappingAnnotationMatch(c, ns, deployOverlapping.Name, "")
	Expect(err).NotTo(HaveOccurred(), "Failed to clear the second deployment's overlapping annotation")

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deployOverlapping.Name, "1", nginxImage)
	Expect(err).NotTo(HaveOccurred(), "The second deployment failed to update to revision 1")

	// Now the second deployment is synced
	By("Checking the second overlapping deployment is synced")
	rsList, err = c.Extensions().ReplicaSets(ns).List(options)
	Expect(err).NotTo(HaveOccurred(), "Failed listing all replica sets in namespace %s", ns)
	Expect(rsList.Items).To(HaveLen(int(replicas)))
	Expect(rsList.Items[0].Spec.Template.Spec.Containers).To(HaveLen(1))
	Expect(rsList.Items[0].Spec.Template.Spec.Containers[0].Image).To(Equal(deployOverlapping.Spec.Template.Spec.Containers[0].Image))

	deploymentName = "third-deployment"
	podLabels = map[string]string{"name": nginxImageName}
	By(fmt.Sprintf("Creating deployment %q", deploymentName))
	d = newDeployment(deploymentName, replicas, podLabels, nginxImageName, nginxImage, extensions.RollingUpdateDeploymentStrategyType, nil)
	deployLater, err := c.Extensions().Deployments(ns).Create(d)
	Expect(err).NotTo(HaveOccurred(), "Failed creating the third deployment")
	defer stopDeployment(c, f.Client, ns, deployLater.Name)

	// Wait for it to be updated to revision 1
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deployLater.Name, "1", nginxImage)
	Expect(err).NotTo(HaveOccurred(), "The third deployment failed to update to revision 1")

	// Update the second deployment's selector to make it overlap with the third deployment
	By(fmt.Sprintf("Updating deployment %q selector to make it overlap with existing one", deployOverlapping.Name))
	deployOverlapping, err = framework.UpdateDeploymentWithRetries(c, ns, deployOverlapping.Name, func(update *extensions.Deployment) {
		update.Spec.Selector = deployLater.Spec.Selector
		update.Spec.Template.Labels = deployLater.Spec.Template.Labels
		update.Spec.Template.Spec.Containers[0].Image = redisImage
	})
	Expect(err).NotTo(HaveOccurred())

	// Wait for overlapping annotation updated to both deployments
	By("Waiting for both deployments to have overlapping annotations")
	err = framework.WaitForOverlappingAnnotationMatch(c, ns, deployOverlapping.Name, deployLater.Name)
	Expect(err).NotTo(HaveOccurred(), "Failed to update the second deployment's overlapping annotation")
	err = framework.WaitForOverlappingAnnotationMatch(c, ns, deployLater.Name, deployOverlapping.Name)
	Expect(err).NotTo(HaveOccurred(), "Failed to update the third deployment's overlapping annotation")

	// The second deployment shouldn't be synced
	By("Checking the second deployment is not synced")
	Expect(deployOverlapping.Annotations[deploymentutil.RevisionAnnotation]).To(Equal("1"))

	// Update the second deployment's selector to make it not overlap with the third deployment
	By(fmt.Sprintf("Updating deployment %q selector to make it not overlap with existing one", deployOverlapping.Name))
	deployOverlapping, err = framework.UpdateDeploymentWithRetries(c, ns, deployOverlapping.Name, func(update *extensions.Deployment) {
		update.Spec.Selector = deploy.Spec.Selector
		update.Spec.Template.Labels = deploy.Spec.Template.Labels
	})
	Expect(err).NotTo(HaveOccurred())

	// Wait for the second deployment to be synced
	By("Checking the second deployment is now synced")
	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deployOverlapping.Name, "2", redisImage)
	Expect(err).NotTo(HaveOccurred(), "The second deployment failed to update to revision 2")
}
