call dropDisabledPodFields from pod status strategy

Author: natasha41575

pkg/registry/core/pod/strategy.go

@@ -226,6 +226,8 @@ func (podStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.
 	if newPod.Status.QOSClass == "" {
 		newPod.Status.QOSClass = oldPod.Status.QOSClass
 	}
+
+	podutil.DropDisabledPodFields(newPod, oldPod)
 }
 
 func (podStatusStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {

pkg/registry/core/pod/strategy_test.go

@@ -3325,3 +3325,85 @@ func TestEphemeralContainersPrepareForUpdate(t *testing.T) {
 		})
 	}
 }
+
+func TestStatusPrepareForUpdate(t *testing.T) {
+	testCases := []struct {
+		description string
+		oldPod      *api.Pod
+		newPod      *api.Pod
+		expected    *api.Pod
+	}{
+		{
+			description: "preserve old owner references",
+			oldPod: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:            "pod",
+					OwnerReferences: []metav1.OwnerReference{{APIVersion: "v1", Kind: "ReplicaSet", Name: "rs-1"}},
+				},
+			},
+			newPod: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:            "pod",
+					OwnerReferences: []metav1.OwnerReference{{APIVersion: "v1", Kind: "ReplicaSet", Name: "rs-2"}},
+				},
+			},
+			expected: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:            "pod",
+					OwnerReferences: []metav1.OwnerReference{{APIVersion: "v1", Kind: "ReplicaSet", Name: "rs-1"}},
+				},
+			},
+		},
+		{
+			description: "preserve old qos if empty",
+			oldPod: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pod"},
+				Status: api.PodStatus{
+					QOSClass: "Guaranteed",
+				},
+			},
+			newPod: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pod"},
+			},
+			expected: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pod"},
+				Status: api.PodStatus{
+					QOSClass: "Guaranteed",
+				},
+			},
+		},
+		{
+			description: "drop disabled status fields",
+			oldPod: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pod"},
+				Status:     api.PodStatus{},
+			},
+			newPod: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pod"},
+				Status: api.PodStatus{
+					ResourceClaimStatuses: []api.PodResourceClaimStatus{
+						{Name: "my-claim", ResourceClaimName: ptr.To("pod-my-claim")},
+					},
+					ContainerStatuses: []api.ContainerStatus{
+						{Resources: &api.ResourceRequirements{}},
+					},
+				},
+			},
+			expected: &api.Pod{
+				ObjectMeta: metav1.ObjectMeta{Name: "pod"},
+				Status: api.PodStatus{
+					ContainerStatuses: []api.ContainerStatus{{}},
+				},
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.description, func(t *testing.T) {
+			StatusStrategy.PrepareForUpdate(genericapirequest.NewContext(), tc.newPod, tc.oldPod)
+			if !cmp.Equal(tc.expected, tc.newPod) {
+				t.Errorf("StatusStrategy.PrepareForUpdate() diff = %v", cmp.Diff(tc.expected, tc.newPod))
+			}
+		})
+	}
+}