fix init container oomkilled as a failure

Signed-off-by: yxxhero <aiopsclub@163.com>

pkg/kubelet/kuberuntime/helpers.go

@@ -142,6 +142,11 @@ func (m *kubeGenericRuntimeManager) getImageUser(image string) (*int64, string,
 // isInitContainerFailed returns true if container has exited and exitcode is not zero
 // or is in unknown state.
 func isInitContainerFailed(status *kubecontainer.Status) bool {
+	// When oomkilled occurs, init container should be considered as a failure.
+	if status.Reason == "OOMKilled" {
+		return true
+	}
+
 	if status.State == kubecontainer.ContainerStateExited && status.ExitCode != 0 {
 		return true
 	}

pkg/kubelet/kuberuntime/helpers_test.go

@@ -39,6 +39,56 @@ func seccompLocalhostPath(profileName string) string {
 	return "localhost/" + seccompLocalhostRef(profileName)
 }
 
+func TestIsInitContainerFailed(t *testing.T) {
+	tests := []struct {
+		status   *kubecontainer.Status
+		isFailed bool
+	}{
+		{
+			status: &kubecontainer.Status{
+				State:    kubecontainer.ContainerStateExited,
+				ExitCode: 1,
+			},
+			isFailed: true,
+		},
+		{
+			status: &kubecontainer.Status{
+				State: kubecontainer.ContainerStateUnknown,
+			},
+			isFailed: true,
+		},
+		{
+			status: &kubecontainer.Status{
+				Reason: "OOMKilled",
+			},
+			isFailed: true,
+		},
+		{
+			status: &kubecontainer.Status{
+				State:    kubecontainer.ContainerStateExited,
+				ExitCode: 0,
+			},
+			isFailed: false,
+		},
+		{
+			status: &kubecontainer.Status{
+				State: kubecontainer.ContainerStateRunning,
+			},
+			isFailed: false,
+		},
+		{
+			status: &kubecontainer.Status{
+				State: kubecontainer.ContainerStateCreated,
+			},
+			isFailed: false,
+		},
+	}
+	for i, test := range tests {
+		isFailed := isInitContainerFailed(test.status)
+		assert.Equal(t, test.isFailed, isFailed, "TestCase[%d]", i)
+	}
+}
+
 func TestStableKey(t *testing.T) {
 	container := &v1.Container{
 		Name:  "test_container",