If Manual Host Replacement is selected for Host Troubleshooting Policy when you create a host in an ApsaraDB for MyBase dedicated cluster, you can manually replace the host to troubleshoot its failures.

Background information

If a host fails, the system notifies you of the fault by using a text message and sets the status of the host to Ready for Replacement. You can view the information about this fault. For more information, see Manage pending events.

Impacts

If a host is replaced, the following impacts occur:

  • The system no longer allocates instances to the host.
  • The system migrates all the instances out of the host.
  • The system migrates all the instances on the host to other available hosts.

Procedure

  1. Log on to the ApsaraDB for MyBase console.
  2. In the upper-left corner of the page, select the region where you want to deploy the dedicated cluster.
    Select a region
  3. Find the dedicated cluster where you want to create the host, and click Details in the Actions column.
  4. In the navigation tree that appears, click Hosts.
  5. Find the host that you want to replace, and choose More > Replace Host.
    Replace a host
  6. Select a replacement method and click OK.
    Note
    • Switch Within Maintenance Window: The system demotes all the instances on the host to secondary, migrates the secondary instances out of the host, and then replaces the host within the maintenance window.
    • Switch Immediately After Data Migration: The system demotes all the instances on the host to secondary, migrates the secondary instances out of the host, and then immediately replaces the host.