Reinstalling a MOTService Host

Background

MOTService supports host reinstallation. If the system is abnormal due to file loss, you can reinstall the host or instance to quickly restore services.

• You can reinstall a single node or both the active and standby MOTService nodes. If the active node is reinstalled, an active/standby switchover is triggered.
• Data can be retained during host reinstallation. After the installation is complete, data restoration is not required.
• Data can be cleared during host reinstallation. After the reinstallation is complete, no service data is available.

Procedure

1. Log in to FusionInsight Manager.
2. Choose Cluster > Services > MOTService and click Instance.
3. You can reinstall the instance or host as needed.
   • Reinstalling an instance: Select a desired instance, click More, and select Reinstall Instances. In the dialog box that is displayed, enter the user password, and reinstall the instance as prompted.
   • Reinstalling a host:
     1. View and record the service IP address of the host where the MOTService instance is.
     2. Choose Hosts, select the host where the MOTService instance is located, click More, and select Reinstall. In the dialog box displayed, enter the user password, and click OK.
     3. (Optional) Select Clear Data and data items to be cleared as needed. The data directories on the host will be automatically cleared. Ensure that the data items selected are no longer used or there are enough copies to avoid service data loss. Use this function with caution.
     4. Select I want to delete the selected hosts and accept the consequences of possible service failures and data loss., select a username, enter the password, and reinstall the host as prompted.