Change our tests to ensure that critical system pods are created in the system namespace

test/e2e/scheduling/predicates.go

@@ -47,6 +47,7 @@ var masterNodes sets.String
 
 type pausePodConfig struct {
 	Name                              string
+	Namespace                         string
 	Affinity                          *v1.Affinity
 	Annotations, Labels, NodeSelector map[string]string
 	Resources                         *v1.ResourceRequirements
@@ -602,9 +603,11 @@ var _ = SIGDescribe("SchedulerPredicates [Serial]", func() {
 })
 
 func initPausePod(f *framework.Framework, conf pausePodConfig) *v1.Pod {
+	var gracePeriod = int64(1)
 	pod := &v1.Pod{
 		ObjectMeta: metav1.ObjectMeta{
 			Name:            conf.Name,
+			Namespace:       conf.Namespace,
 			Labels:          conf.Labels,
 			Annotations:     conf.Annotations,
 			OwnerReferences: conf.OwnerReferences,
@@ -619,9 +622,10 @@ func initPausePod(f *framework.Framework, conf pausePodConfig) *v1.Pod {
 					Ports: conf.Ports,
 				},
 			},
-			Tolerations:       conf.Tolerations,
-			NodeName:          conf.NodeName,
-			PriorityClassName: conf.PriorityClassName,
+			Tolerations:                   conf.Tolerations,
+			NodeName:                      conf.NodeName,
+			PriorityClassName:             conf.PriorityClassName,
+			TerminationGracePeriodSeconds: &gracePeriod,
 		},
 	}
 	if conf.Resources != nil {
@@ -631,7 +635,11 @@ func initPausePod(f *framework.Framework, conf pausePodConfig) *v1.Pod {
 }
 
 func createPausePod(f *framework.Framework, conf pausePodConfig) *v1.Pod {
-	pod, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Create(initPausePod(f, conf))
+	namespace := conf.Namespace
+	if len(namespace) == 0 {
+		namespace = f.Namespace.Name
+	}
+	pod, err := f.ClientSet.CoreV1().Pods(namespace).Create(initPausePod(f, conf))
 	framework.ExpectNoError(err)
 	return pod
 }
@@ -639,7 +647,7 @@ func createPausePod(f *framework.Framework, conf pausePodConfig) *v1.Pod {
 func runPausePod(f *framework.Framework, conf pausePodConfig) *v1.Pod {
 	pod := createPausePod(f, conf)
 	framework.ExpectNoError(framework.WaitForPodRunningInNamespace(f.ClientSet, pod))
-	pod, err := f.ClientSet.CoreV1().Pods(f.Namespace.Name).Get(conf.Name, metav1.GetOptions{})
+	pod, err := f.ClientSet.CoreV1().Pods(pod.Namespace).Get(conf.Name, metav1.GetOptions{})
 	framework.ExpectNoError(err)
 	return pod
 }

test/e2e/scheduling/preemption.go

@@ -167,6 +167,7 @@ var _ = SIGDescribe("SchedulerPreemption [Serial] [Feature:PodPreemption]", func
 		// Create a critical pod and make sure it is scheduled.
 		runPausePod(f, pausePodConfig{
 			Name:              "critical-pod",
+			Namespace:         metav1.NamespaceSystem,
 			PriorityClassName: scheduling.SystemClusterCritical,
 			Resources: &v1.ResourceRequirements{
 				Requests: podRes,
@@ -183,6 +184,9 @@ var _ = SIGDescribe("SchedulerPreemption [Serial] [Feature:PodPreemption]", func
 			framework.ExpectNoError(err)
 			Expect(livePod.DeletionTimestamp).To(BeNil())
 		}
+		// Clean-up the critical pod
+		err = f.ClientSet.CoreV1().Pods(metav1.NamespaceSystem).Delete("critical-pod", metav1.NewDeleteOptions(0))
+		framework.ExpectNoError(err)
 	})
 
 	// This test verifies that when a high priority pod is pending and its
@@ -334,10 +338,14 @@ var _ = SIGDescribe("PodPriorityResolution [Serial] [Feature:PodPreemption]", fu
 		for i, spc := range systemPriorityClasses {
 			pod := createPausePod(f, pausePodConfig{
 				Name:              fmt.Sprintf("pod%d-%v", i, spc),
+				Namespace:         metav1.NamespaceSystem,
 				PriorityClassName: spc,
 			})
 			Expect(pod.Spec.Priority).NotTo(BeNil())
 			framework.Logf("Created pod: %v", pod.Name)
+			// Clean-up the pod.
+			err := f.ClientSet.CoreV1().Pods(pod.Namespace).Delete(pod.Name, metav1.NewDeleteOptions(0))
+			framework.ExpectNoError(err)
 		}
 	})
 })

test/kubemark/resources/kube_dns_template.yaml

@@ -60,7 +60,6 @@ spec:
       annotations:
         scheduler.alpha.kubernetes.io/critical-pod: ''
     spec:
-      priorityClassName: system-cluster-critical
       tolerations:
       - key: "CriticalAddonsOnly"
         operator: "Exists"