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Device Management

telemetries in deviceshifu_configmap.yaml represents automatic measurement logging conduction. Shifu determines the connection status of a device by sending requests to the device periodically at the specified time by the method set in telemetries. If a device fails or has connection problems, the status of edgeDevice will change, and you can check its status with kubectl describe edgedevice -A.

...
telemetries: |  
  telemetrySettings:  
    telemetryUpdateIntervaInlMiliseconds: 1000  
  telemetries:  
    device_health:  
      properties:  
        instruction: get_server  
        initialDelayMs: 1000  
        intervalMs: 1000

The telemetryUpdateIntervaInlMiliseconds under telemetrySettings indicates the time interval for automatic measurement.

Multiple objects can be included under telemetries, i.e. multiple objects can be turned on at the same time.

Case Demonstration​

  1. First we start an OPC UA device and start deviceShifu. After that we can check the working status of the device with the following command. 
    $ kubectl describe edgedevice -A
    ...
    Status:
      Edgedevicephase: Running
    Events: <none>
  2. We can see that the device is currently in the Running state, so let's shut it down. At this point, we can check the status of the device with the following command. 
    $ kubectl describe edgedevice -A
    ...
    Status:
      Edgedevicephase: Failed
    Events: <none>
  3. we can see that the device is currently in Failed state, at this point we can restart the device. Shifu will update the device status to Running when it detects the device starting up, we will enter the following command to see the change in the device status. 
    $ kubectl describe edgedevice -A
    ...
    Status:
      Edgedevicephase: Running
    Events: <none>