Auto Scaling:Health diagnosis

Manually initiate a health diagnosis request

1. Log on to the Auto Scaling console.
2. Find a scaling group and use one of the following methods to go to the scaling group details page:
   • Click the ID of the scaling group in the Scaling Group Name/ID column.
   • Click Details in the Actions column.
3. In the upper part of the scaling group details page, click the Health Check tab.
4. Click Diagnose Now.
   When the status in the Diagnostic Progress column changes from Diagnosing to Completed, the health diagnosis is complete. Then, you can view information such as the report ID and diagnostic status.
5. In the Actions column of the report, click View Report.
   • If a similar report is displayed as shown in the following figure, no exceptions are detected and your scaling group is healthy.
   • If a similar report is displayed as shown in the following figure, exceptions are detected. Resolve the issues based on the exception details and troubleshooting suggestions. The following figure shows that the vSwitch is abnormal.

   Note If you want to delete a report after you view the content of the report, click Delete Report in the Actions column. In the Delete Report message, click OK.

Configure an automatic health diagnosis task

Before you configure an automatic health diagnosis task, make sure that your scaling group is in the Enabled state. For more information, see Enable or disable scaling groups.

1. Log on to the Auto Scaling console.
2. Find a scaling group and use one of the following methods to go to the scaling group details page:
   • Click the ID of the scaling group in the Scaling Group Name/ID column.
   • Click Details in the Actions column.
3. In the upper part of the scaling group details page, click the Notification Rules tab.
4. Click Create Advanced Rule.
5. In the Create Notification Rule dialog box, configure a notification method and specify a notification event, and then click OK. The following table describes the parameters.

   Parameter	Description
   Notification Method	Set the value to CloudMonitor.
   Event	Select Scaling Group Diagnosis.

6. Find the notification rule that is created in Step 5 and click CloudMonitor in the Notification Method column to go to the System Event page.
7. On the Event Monitoring tab, select Auto Scaling and click Search to query exceptions that are detected during the health diagnosis.
   Note CloudMonitor updates the health diagnosis result every 2 hours.

   • If no exceptions are detected in your scaling group during the health diagnosis, no data is displayed on the CloudMonitor page.
   • If exceptions are detected in your scaling group during the health diagnosis, your CloudMonitor page is displayed as shown in the following figure. In the figure, the exception is that the vSwitch is deleted.
     In the Actions column of the Auto Scaling system event, click Details to view the details of the event. Sample event details:

     {
         "details": [
             {
                 "diagnoseType": "VSwitch",
                 "errorCode": "VSwitchIdNotFound",
                 "resourceId": "vsw-bp1ech44ks0w4zq4u****",
                 "status": "Critical"
             }
         ]
     }

Health diagnosis items and results