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Manual Chapter: Return the Data Collection Cluster to Operation
Manual Chapter
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Restart data collection device cluster

If too much time elapses between the time you upgrade the data collection devices in your cluster, the cluster communication between data collection devices can fail. If the communication fails, some of the devices can fail to re-join the cluster. If one of the devices does not re-join the cluster, the cluster will not operate. To prevent this scenario, you need to restart the cluster before proceeding.

Note: You must perform this task on each device in the cluster (that is, each data collection device, the BIG-IQ® Centralized Management device, and the BIG-IQ HA peer).
  1. Use SSH to log in to a device in the cluster.
    You must log in as root to perform this procedure.
  2. Run the following command to restart the cluster on this device:
    bigstart restart elasticsearch
  3. Run the following command to confirm that the cluster restarted on this device:
    bigstart status elasticsearch
  4. Repeat the previous three steps for each device in the cluster.
Once you have restarted the cluster for each device, you can proceed to the next task.

Recheck data collection device health

You can use the Settings screen to review the overall health and status of the data collection devices you've configured. You can use the data displayed on this screen both before and after an upgrade to verify that your data collection device cluster configuration is as you expect.
  1. At the top of the screen, click System.
  2. On the left, expand BIG-IQ DATA COLLECTION and then select BIG-IQ Data Collection Devices.
    The BIG-IQ Data Collection Devices screen opens to display the currently defined data collection device cluster.
  3. Click the Settings button.
    The Settings screen opens to display the current state of the DCD cluster defined for this BIG-IQ device.
  4. Analyze the data collection device cluster details listed in the Summary area, and make sure that the values after upgrade match the values from the health check you did before the upgrade.
    • Devices in Cluster
    • Total Document Count
    • Total Document Size
    This information provides a fairly detailed overview that describes the data collection device cluster you have created to store alerts and event log data.
  5. Check the cluster health status. If there are any cluster health issues, resolve those issues and then repeat the process until the cluster health is as you expect it to be.

Activate data collection devices services

To upgrade your data collection devices, you deactivated all data collection device services. Once the upgraded software is installed, you must activate the services before you can resume normal operation.
Note: Perform this action on the BIG-IQ® Centralized Management device; not the data collection device (DCD).
  1. At the top of the screen, click System.
  2. On the left, expand BIG-IQ DATA COLLECTION and then select BIG-IQ Data Collection Devices.
    The BIG-IQ Data Collection Devices screen opens to display the currently defined data collection device cluster.
  3. Click a DCD name.
    The Properties screen for the selected device opens.
  4. On the left, click Services.
  5. For each service that you use, click Activate.
  6. Click Close.
  7. Repeat the steps for each DCD in the cluster.
This restarts the services on your DCDs.
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