CRI: add Message in ContainerStatus

pkg/kubelet/api/v1alpha1/runtime/api.proto

@@ -571,14 +571,17 @@ message ContainerStatus {
     // Reference to the image in use. For most runtimes, this should be an
     // image ID
     optional string image_ref = 9;
-    // A string explains why container is in such a status.
+    // A brief CamelCase string explains why container is in such a status.
     optional string reason = 10;
+    // A human-readable message indication details about why container is in
+    // this state.
+    optional string message = 11;
     // Labels are key value pairs that may be used to scope and select individual resources.
-    map<string,string> labels = 11;
+    map<string,string> labels = 12;
     // Annotations is an unstructured key value map.
-    map<string,string> annotations = 12;
+    map<string,string> annotations = 13;
     // Mounts specifies mounts for the container
-    repeated Mount mounts = 13;
+    repeated Mount mounts = 14;
 }
 
 message ContainerStatusResponse {

pkg/kubelet/dockershim/docker_container.go

@@ -239,7 +239,7 @@ func (ds *dockerService) ContainerStatus(containerID string) (*runtimeApi.Contai
 	}
 	// Interpret container states.
 	var state runtimeApi.ContainerState
-	var reason string
+	var reason, message string
 	if r.State.Running {
 		// Container is running.
 		state = runtimeApi.ContainerState_RUNNING
@@ -261,9 +261,9 @@ func (ds *dockerService) ContainerStatus(containerID string) (*runtimeApi.Contai
 			case r.State.ExitCode == 0:
 				reason = "Completed"
 			default:
-				reason = fmt.Sprintf("Error: %s", r.State.Error)
+				reason = "Error"
 			}
-		} else if !finishedAt.IsZero() && r.State.ExitCode != 0 { // Case 2
+		} else if r.State.ExitCode != 0 { // Case 2
 			state = runtimeApi.ContainerState_EXITED
 			// Adjust finshedAt and startedAt time to createdAt time to avoid
 			// the confusion.
@@ -272,6 +272,7 @@ func (ds *dockerService) ContainerStatus(containerID string) (*runtimeApi.Contai
 		} else { // Case 3
 			state = runtimeApi.ContainerState_CREATED
 		}
+		message = r.State.Error
 	}
 
 	// Convert to unix timestamps.
@@ -296,6 +297,7 @@ func (ds *dockerService) ContainerStatus(containerID string) (*runtimeApi.Contai
 		StartedAt:   &st,
 		FinishedAt:  &ft,
 		Reason:      &reason,
+		Message:     &message,
 		Labels:      labels,
 		Annotations: annotations,
 	}, nil

pkg/kubelet/dockershim/docker_container_test.go

@@ -104,7 +104,7 @@ func TestContainerStatus(t *testing.T) {
 	// The following variables are not set in FakeDockerClient.
 	imageRef := ""
 	exitCode := int32(0)
-	reason := ""
+	var reason, message string
 
 	expected := &runtimeApi.ContainerStatus{
 		State:       &state,
@@ -116,6 +116,7 @@ func TestContainerStatus(t *testing.T) {
 		ImageRef:    &imageRef,
 		ExitCode:    &exitCode,
 		Reason:      &reason,
+		Message:     &message,
 		Mounts:      []*runtimeApi.Mount{},
 		Labels:      config.Labels,
 		Annotations: config.Annotations,

pkg/kubelet/kuberuntime/kuberuntime_container.go

@@ -377,11 +377,16 @@ func (m *kubeGenericRuntimeManager) getKubeletContainerStatuses(podSandboxID str
 			cStatus.StartedAt = time.Unix(status.GetStartedAt(), 0)
 		} else {
 			cStatus.Reason = status.GetReason()
+			cStatus.Message = status.GetMessage()
 			cStatus.ExitCode = int(status.GetExitCode())
 			cStatus.FinishedAt = time.Unix(status.GetFinishedAt(), 0)
 		}
 
-		cStatus.Message = getTerminationMessage(status, cStatus, annotatedInfo.TerminationMessagePath)
+		tMessage := getTerminationMessage(status, cStatus, annotatedInfo.TerminationMessagePath)
+		// Use the termination message written by the application is not empty
+		if len(tMessage) != 0 {
+			cStatus.Message = tMessage
+		}
 		statuses[i] = cStatus
 	}