[cherry-pick]fix the driver pod can not be created due to unreasonable admit

pkg/webhooks/admission/pods/validate/admit_pod.go

@@ -96,9 +96,8 @@ func AdmitPods(ar admissionv1.AdmissionReview) *admissionv1.AdmissionResponse {
 /*
 allow pods to create when
 1. schedulerName of pod isn't volcano
-2. pod has Podgroup whose phase isn't Pending
-3. normal pods whose schedulerName is volcano don't have podgroup.
-4. check pod budget annotations configure
+2. normal pods whose schedulerName is volcano don't have podgroup.
+3. check pod budget annotations configure
 */
 func validatePod(pod *v1.Pod, reviewResponse *admissionv1.AdmissionResponse) string {
 	if pod.Spec.SchedulerName != config.SchedulerName {
@@ -113,7 +112,7 @@ func validatePod(pod *v1.Pod, reviewResponse *admissionv1.AdmissionResponse) str
 		pgName = pod.Annotations[vcv1beta1.KubeGroupNameAnnotationKey]
 	}
 	if pgName != "" {
-		if err := checkPGPhase(pod, pgName, true); err != nil {
+		if err := checkPG(pod, pgName, true); err != nil {
 			msg = err.Error()
 			reviewResponse.Allowed = false
 		}
@@ -122,7 +121,7 @@ func validatePod(pod *v1.Pod, reviewResponse *admissionv1.AdmissionResponse) str
 
 	// normal pod, SN == volcano
 	pgName = helpers.GeneratePodgroupName(pod)
-	if err := checkPGPhase(pod, pgName, false); err != nil {
+	if err := checkPG(pod, pgName, false); err != nil {
 		msg = err.Error()
 		reviewResponse.Allowed = false
 	}
@@ -136,19 +135,15 @@ func validatePod(pod *v1.Pod, reviewResponse *admissionv1.AdmissionResponse) str
 	return msg
 }
 
-func checkPGPhase(pod *v1.Pod, pgName string, isVCJob bool) error {
-	pg, err := config.VolcanoClient.SchedulingV1beta1().PodGroups(pod.Namespace).Get(context.TODO(), pgName, metav1.GetOptions{})
+func checkPG(pod *v1.Pod, pgName string, isVCJob bool) error {
+	_, err := config.VolcanoClient.SchedulingV1beta1().PodGroups(pod.Namespace).Get(context.TODO(), pgName, metav1.GetOptions{})
 	if err != nil {
 		if isVCJob || (!isVCJob && !apierrors.IsNotFound(err)) {
 			return fmt.Errorf("failed to get PodGroup for pod <%s/%s>: %v", pod.Namespace, pod.Name, err)
 		}
 		return nil
 	}
-	if pg.Status.Phase != vcv1beta1.PodGroupPending {
-		return nil
-	}
-	return fmt.Errorf("failed to create pod <%s/%s> as the podgroup phase is Pending",
-		pod.Namespace, pod.Name)
+	return nil
 }
 
 func validateAnnotation(pod *v1.Pod) error {

pkg/webhooks/admission/pods/validate/admit_pod_test.go

@@ -33,7 +33,6 @@ func TestValidatePod(t *testing.T) {
 
 	namespace := "test"
 	pgName := "podgroup-p1"
-	isController := true
 
 	testCases := []struct {
 		Name           string
@@ -64,52 +63,6 @@ func TestValidatePod(t *testing.T) {
 			ret:            "",
 			ExpectErr:      false,
 		},
-		// validate normal pod with volcano scheduler
-		{
-			Name: "validate volcano-scheduler normal pod",
-			Pod: v1.Pod{
-				TypeMeta: metav1.TypeMeta{
-					APIVersion: "v1",
-					Kind:       "Pod",
-				},
-				ObjectMeta: metav1.ObjectMeta{
-					Namespace: namespace,
-					Name:      "normal-pod-2",
-					OwnerReferences: []metav1.OwnerReference{
-						{UID: "p1", Controller: &isController},
-					},
-				},
-				Spec: v1.PodSpec{
-					SchedulerName: "volcano",
-				},
-			},
-
-			reviewResponse: admissionv1.AdmissionResponse{Allowed: false},
-			ret:            "failed to create pod <test/normal-pod-2> as the podgroup phase is Pending",
-			ExpectErr:      true,
-		},
-		// validate volcano pod with volcano scheduler
-		{
-			Name: "validate volcano-scheduler volcano pod",
-			Pod: v1.Pod{
-				TypeMeta: metav1.TypeMeta{
-					APIVersion: "v1",
-					Kind:       "Pod",
-				},
-				ObjectMeta: metav1.ObjectMeta{
-					Namespace:   namespace,
-					Name:        "volcano-pod-1",
-					Annotations: map[string]string{vcschedulingv1.KubeGroupNameAnnotationKey: pgName},
-				},
-				Spec: v1.PodSpec{
-					SchedulerName: "volcano",
-				},
-			},
-
-			reviewResponse: admissionv1.AdmissionResponse{Allowed: false},
-			ret:            "failed to create pod <test/volcano-pod-1> as the podgroup phase is Pending",
-			ExpectErr:      true,
-		},
 		// validate volcano pod with volcano scheduler when get pg failed
 		{
 			Name: "validate volcano volcano pod when get pg failed",

test/e2e/jobp/admission.go

@@ -253,7 +253,7 @@ var _ = ginkgo.Describe("Job E2E Test: Test Admission service", func() {
 		gomega.Expect(err).NotTo(gomega.HaveOccurred())
 	})
 
-	ginkgo.It("Can't create volcano pod when podgroup is Pending", func() {
+	ginkgo.It("Allow to create pod when podgroup is Pending", func() {
 		podName := "pod-volcano"
 		pgName := "pending-pg"
 		ctx := e2eutil.InitTestContext(e2eutil.Options{})
@@ -293,7 +293,7 @@ var _ = ginkgo.Describe("Job E2E Test: Test Admission service", func() {
 		gomega.Expect(err).NotTo(gomega.HaveOccurred())
 
 		_, err = ctx.Kubeclient.CoreV1().Pods(ctx.Namespace).Create(context.TODO(), pod, v1.CreateOptions{})
-		gomega.Expect(err.Error()).Should(gomega.ContainSubstring(`the podgroup phase is Pending`))
+		gomega.Expect(err).NotTo(gomega.HaveOccurred())
 	})
 
 	ginkgo.It("Job mutate check", func() {

test/e2e/schedulingaction/preempt.go

@@ -118,7 +118,7 @@ var _ = Describe("Job E2E Test", func() {
 		Expect(err).NotTo(HaveOccurred())
 	})
 
-	It("preemption doesn't work when podgroup is pending", func() {
+	It("preemption doesn't work when podgroup is pending due to insufficient resource", func() {
 		ctx := e2eutil.InitTestContext(e2eutil.Options{
 			PriorityClasses: map[string]int32{
 				highPriority: highPriorityValue,
@@ -175,8 +175,12 @@ var _ = Describe("Job E2E Test", func() {
 				PriorityClassName: highPriority,
 			},
 		}
+		// Pod is allowed to be created, preemption does not happen due to PodGroup is in pending state
 		_, err = ctx.Kubeclient.CoreV1().Pods(ctx.Namespace).Create(context.TODO(), pod, v1.CreateOptions{})
-		Expect(err).To(HaveOccurred())
+		Expect(err).NotTo(HaveOccurred())
+		// Make sure preempteeJob is not preempted as expected
+		err = e2eutil.WaitTasksReady(ctx, preempteeJob, int(rep))
+		Expect(err).NotTo(HaveOccurred())
 	})
 
 	It("preemption only works in the same queue", func() {