test: add upgrade test for deployments

test/e2e/cluster_upgrade.go

@@ -32,6 +32,7 @@ import (
 var upgradeTests = []upgrades.Test{
 	&upgrades.ServiceUpgradeTest{},
 	&upgrades.SecretUpgradeTest{},
+	&upgrades.DeploymentUpgradeTest{},
 }
 
 var _ = framework.KubeDescribe("Upgrade [Feature:Upgrade]", func() {

test/e2e/upgrades/BUILD

@@ -10,6 +10,7 @@ load(
 go_library(
     name = "go_default_library",
     srcs = [
+        "deployments.go",
         "secrets.go",
         "services.go",
         "upgrade.go",
@@ -17,6 +18,8 @@ go_library(
     tags = ["automanaged"],
     deps = [
         "//pkg/api/v1:go_default_library",
+        "//pkg/apis/extensions/v1beta1:go_default_library",
+        "//pkg/controller/deployment/util:go_default_library",
         "//test/e2e/framework:go_default_library",
         "//vendor:github.com/onsi/ginkgo",
         "//vendor:k8s.io/apimachinery/pkg/apis/meta/v1",

test/e2e/upgrades/deployments.go

@@ -0,0 +1,137 @@
+/*
+Copyright 2017 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 upgrades
+
+import (
+	"fmt"
+
+	extensions "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
+	deploymentutil "k8s.io/kubernetes/pkg/controller/deployment/util"
+	"k8s.io/kubernetes/test/e2e/framework"
+
+	. "github.com/onsi/ginkgo"
+)
+
+// TODO: Test that the deployment stays available during master (and maybe
+// node and cluster upgrades).
+
+// DeploymentUpgradeTest tests that a deployment is using the same replica
+// sets before and after a cluster upgrade.
+type DeploymentUpgradeTest struct {
+	d     *extensions.Deployment
+	oldRS *extensions.ReplicaSet
+	newRS *extensions.ReplicaSet
+}
+
+// Setup creates a deployment and makes sure it has a new and an old replica set running.
+func (t *DeploymentUpgradeTest) Setup(f *framework.Framework) {
+	deploymentName := "deployment-hash-test"
+	c := f.ClientSet
+	nginxImage := "gcr.io/google_containers/nginx-slim:0.8"
+
+	// Grab a unique namespace so we don't collide.
+	namespace, err := f.CreateNamespace("deployment-upgrade", nil)
+	framework.ExpectNoError(err)
+	ns := namespace.Name
+
+	By(fmt.Sprintf("Creating a deployment %q in namespace %q", deploymentName, ns))
+	d := framework.NewDeployment(deploymentName, int32(1), map[string]string{"test": "upgrade"}, "nginx", nginxImage, extensions.RollingUpdateDeploymentStrategyType)
+	deployment, err := c.Extensions().Deployments(ns).Create(d)
+	framework.ExpectNoError(err)
+
+	// Wait for it to be updated to revision 1
+	By(fmt.Sprintf("Waiting deployment %q to be updated to revision 1", deploymentName))
+	err = framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "1", nginxImage)
+	framework.ExpectNoError(err)
+
+	By(fmt.Sprintf("Waiting deployment %q to complete", deploymentName))
+	framework.ExpectNoError(framework.WaitForDeploymentStatusValid(c, deployment))
+
+	rs, err := deploymentutil.GetNewReplicaSet(deployment, c)
+	framework.ExpectNoError(err)
+	if rs == nil {
+		framework.ExpectNoError(fmt.Errorf("expected a new replica set for deployment %q, found none", deployment.Name))
+	}
+
+	// Store the old replica set - should be the same after the upgrade.
+	t.oldRS = rs
+
+	// Trigger a new rollout so that we have some history.
+	By(fmt.Sprintf("Triggering a new rollout for deployment %q", deploymentName))
+	deployment, err = framework.UpdateDeploymentWithRetries(c, ns, deploymentName, func(update *extensions.Deployment) {
+		update.Spec.Template.Spec.Containers[0].Name = "updated-name"
+	})
+	framework.ExpectNoError(err)
+
+	// Use observedGeneration to determine if the controller noticed the pod template update.
+	framework.Logf("Wait deployment %q to be observed by the deployment controller", deploymentName)
+	framework.ExpectNoError(framework.WaitForObservedDeployment(c, ns, deploymentName, deployment.Generation))
+
+	// Wait for it to be updated to revision 2
+	By(fmt.Sprintf("Waiting deployment %q to be updated to revision 2", deploymentName))
+	framework.ExpectNoError(framework.WaitForDeploymentRevisionAndImage(c, ns, deploymentName, "2", nginxImage))
+
+	By(fmt.Sprintf("Waiting deployment %q to complete", deploymentName))
+	framework.ExpectNoError(framework.WaitForDeploymentStatus(c, deployment))
+
+	rs, err = deploymentutil.GetNewReplicaSet(deployment, c)
+	framework.ExpectNoError(err)
+	if rs == nil {
+		framework.ExpectNoError(fmt.Errorf("expected a new replica set for deployment %q", deployment.Name))
+	}
+
+	if rs.UID == t.oldRS.UID {
+		framework.ExpectNoError(fmt.Errorf("expected a new replica set different from the previous one"))
+	}
+
+	// Store new replica set - should be the same after the upgrade.
+	t.newRS = rs
+	t.d = deployment
+}
+
+// Test checks whether the replica sets for a deployment are the same after an upgrade.
+func (t *DeploymentUpgradeTest) Test(f *framework.Framework, done <-chan struct{}, upgrade UpgradeType) {
+	// Block until upgrade is done
+	By(fmt.Sprintf("Waiting for upgrade to finish before checking replica sets for deployment %q", t.d.Name))
+	<-done
+
+	By(fmt.Sprintf("Checking that replica sets for deployment %q are the same as prior to the upgrade", t.d.Name))
+	_, allOldRSs, newRS, err := deploymentutil.GetAllReplicaSets(t.d, f.ClientSet)
+	framework.ExpectNoError(err)
+	if newRS == nil {
+		framework.ExpectNoError(fmt.Errorf("expected a new replica set for deployment %q", t.d.Name))
+	}
+	if newRS.UID != t.newRS.UID {
+		framework.ExpectNoError(fmt.Errorf("expected new replica set:\n%#v\ngot new replica set:\n%#v\n", t.newRS, newRS))
+	}
+	if len(allOldRSs) != 1 {
+		errString := fmt.Sprintf("expected one old replica set, got %d\n", len(allOldRSs))
+		for i := range allOldRSs {
+			rs := allOldRSs[i]
+			errString += fmt.Sprintf("%#v\n", rs)
+		}
+		framework.ExpectNoError(fmt.Errorf(errString))
+	}
+	if allOldRSs[0].UID != t.oldRS.UID {
+		framework.ExpectNoError(fmt.Errorf("expected old replica set:\n%#v\ngot old replica set:\n%#v\n", t.oldRS, allOldRSs[0]))
+	}
+}
+
+// Teardown cleans up any remaining resources.
+func (t *DeploymentUpgradeTest) Teardown(f *framework.Framework) {
+	// rely on the namespace deletion to clean up everything
+}