e2e: use kubernetes utils pointer library

test/e2e/e2e_duplicatepods_test.go

@@ -26,6 +26,7 @@ import (
 	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/utils/pointer"
 	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
@@ -90,7 +91,7 @@ func TestRemoveDuplicates(t *testing.T) {
 			description: "Evict Pod even Pods schedule to specific node",
 			replicasNum: 4,
 			beforeFunc: func(deployment *appsv1.Deployment) {
-				deployment.Spec.Replicas = func(i int32) *int32 { return &i }(4)
+				deployment.Spec.Replicas = pointer.Int32(4)
 				deployment.Spec.Template.Spec.NodeName = workerNodes[0].Name
 			},
 			expectedEvictedPodCount: 2,
@@ -99,7 +100,7 @@ func TestRemoveDuplicates(t *testing.T) {
 			description: "Evict Pod even Pods with local storage",
 			replicasNum: 5,
 			beforeFunc: func(deployment *appsv1.Deployment) {
-				deployment.Spec.Replicas = func(i int32) *int32 { return &i }(5)
+				deployment.Spec.Replicas = pointer.Int32(5)
 				deployment.Spec.Template.Spec.Volumes = []v1.Volume{
 					{
 						Name: "sample",

test/e2e/e2e_failedpods_test.go

@@ -12,6 +12,7 @@ import (
 	"k8s.io/apimachinery/pkg/labels"
 	"k8s.io/apimachinery/pkg/util/wait"
 	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/utils/pointer"
 
 	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/strategies"
@@ -113,7 +114,6 @@ func initFailedJob(name, namespace string) *batchv1.Job {
 	podSpec.Containers[0].Command = []string{"/bin/false"}
 	podSpec.RestartPolicy = v1.RestartPolicyNever
 	labelsSet := labels.Set{"test": name, "name": name}
-	jobBackoffLimit := int32(0)
 	return &batchv1.Job{
 		ObjectMeta: metav1.ObjectMeta{
 			Labels:    labelsSet,
@@ -125,7 +125,7 @@ func initFailedJob(name, namespace string) *batchv1.Job {
 				Spec:       podSpec,
 				ObjectMeta: metav1.ObjectMeta{Labels: labelsSet},
 			},
-			BackoffLimit: &jobBackoffLimit,
+			BackoffLimit: pointer.Int32(0),
 		},
 	}
 }

test/e2e/e2e_leaderelection_test.go

@@ -30,6 +30,7 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
 	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/utils/pointer"
 
 	"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
 	"sigs.k8s.io/descheduler/pkg/descheduler"
@@ -153,7 +154,7 @@ func createDeployment(ctx context.Context, clientSet clientset.Interface, namesp
 			Labels:    map[string]string{"test": "leaderelection", "name": "test-leaderelection"},
 		},
 		Spec: appsv1.DeploymentSpec{
-			Replicas: func(i int32) *int32 { return &i }(replicas),
+			Replicas: pointer.Int32(replicas),
 			Selector: &metav1.LabelSelector{
 				MatchLabels: map[string]string{"test": "leaderelection", "name": "test-leaderelection"},
 			},

test/e2e/e2e_test.go

@@ -37,6 +37,7 @@ import (
 	coreinformers "k8s.io/client-go/informers/core/v1"
 	clientset "k8s.io/client-go/kubernetes"
 	v1qos "k8s.io/kubectl/pkg/util/qos"
+	"k8s.io/utils/pointer"
 
 	"sigs.k8s.io/descheduler/cmd/descheduler/app/options"
 	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
@@ -76,12 +77,10 @@ func MakePodSpec(priorityClassName string, gracePeriod *int64) v1.PodSpec {
 
 // RcByNameContainer returns a ReplicationController with specified name and container
 func RcByNameContainer(name, namespace string, replicas int32, labels map[string]string, gracePeriod *int64, priorityClassName string) *v1.ReplicationController {
-	zeroGracePeriod := int64(0)
-
 	// Add "name": name to the labels, overwriting if it exists.
 	labels["name"] = name
 	if gracePeriod == nil {
-		gracePeriod = &zeroGracePeriod
+		gracePeriod = pointer.Int64(0)
 	}
 	return &v1.ReplicationController{
 		TypeMeta: metav1.TypeMeta{
@@ -93,7 +92,7 @@ func RcByNameContainer(name, namespace string, replicas int32, labels map[string
 			Namespace: namespace,
 		},
 		Spec: v1.ReplicationControllerSpec{
-			Replicas: func(i int32) *int32 { return &i }(replicas),
+			Replicas: pointer.Int32(replicas),
 			Selector: map[string]string{
 				"name": name,
 			},
@@ -981,7 +980,7 @@ func TestPodLifeTimeOldestEvicted(t *testing.T) {
 	oldestPod := podList.Items[0]
 
 	t.Log("Scale the rs to 5 replicas with the 4 new pods having a more recent creation timestamp")
-	rc.Spec.Replicas = func(i int32) *int32 { return &i }(5)
+	rc.Spec.Replicas = pointer.Int32(5)
 	rc, err = clientSet.CoreV1().ReplicationControllers(rc.Namespace).Update(ctx, rc, metav1.UpdateOptions{})
 	if err != nil {
 		t.Errorf("Error updating deployment %v", err)
@@ -1094,7 +1093,7 @@ func waitForTerminatingPodsToDisappear(ctx context.Context, t *testing.T, client
 func deleteRC(ctx context.Context, t *testing.T, clientSet clientset.Interface, rc *v1.ReplicationController) {
 	// set number of replicas to 0
 	rcdeepcopy := rc.DeepCopy()
-	rcdeepcopy.Spec.Replicas = func(i int32) *int32 { return &i }(0)
+	rcdeepcopy.Spec.Replicas = pointer.Int32(0)
 	if _, err := clientSet.CoreV1().ReplicationControllers(rcdeepcopy.Namespace).Update(ctx, rcdeepcopy, metav1.UpdateOptions{}); err != nil {
 		t.Fatalf("Error updating replica controller %v", err)
 	}

test/e2e/e2e_toomanyrestarts_test.go

@@ -28,6 +28,7 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/labels"
 	clientset "k8s.io/client-go/kubernetes"
+	"k8s.io/utils/pointer"
 	deschedulerapi "sigs.k8s.io/descheduler/pkg/api"
 	"sigs.k8s.io/descheduler/pkg/descheduler/evictions"
 	eutils "sigs.k8s.io/descheduler/pkg/descheduler/evictions/utils"
@@ -61,7 +62,7 @@ func TestTooManyRestarts(t *testing.T) {
 			Labels:    map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"},
 		},
 		Spec: appsv1.DeploymentSpec{
-			Replicas: func(i int32) *int32 { return &i }(4),
+			Replicas: pointer.Int32(4),
 			Selector: &metav1.LabelSelector{
 				MatchLabels: map[string]string{"test": "restart-pod", "name": "test-toomanyrestarts"},
 			},