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.
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.
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.
- Log on to the ApsaraDB for MyBase console.
- In the upper-left corner of the page, select the region where you want to deploy the
- Find the dedicated cluster where you want to create the host, and click Details in the Actions column.
- In the navigation tree that appears, click Hosts.
- Find the host that you want to replace, and choose .
- 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.