Service Migration in the Production Center After Fault Recovery

Prerequisites

A LUN-based protection policy and recovery plan have been configured.

Context

If data or applications become unavailable due to disasters or faults in the production center, services will be quickly switched to and started in the DR center. After the production center recovers, the services will be switched back to it by performing planned migrations.

Procedure

1. Perform a fault recovery.
   

   If Huawei UltraPath has been installed on the Kylin-based DR host, ensure that I/O suspension time is not 0, and virtual devices generated by UltraPath have corresponding physical devices. For details, see the OceanStor UltraPath for Linux xxx User Guide of the corresponding version.

   1. On the menu bar, select Utilization > Data Restore.
   2. Select a recovery plan for which you want to perform fault recovery and choose More > Fault Recovery in the Operation area.
   3. Perform a fault recovery. Perform the following steps:
      1. Select DR Site.
      2. Choose Host (Group) > Available DR Hosts or Host Groups.
         

         For flash storage, automatic host adding and storage mapping are provided. Ensure that the storage is connected properly to host initiators. In this manner, the system can automatically create hosts, host groups, LUN groups, and mapping views on the storage. The creation principles are as follows:

         

      3. Click Fault Recovery.
      4. Carefully read the contents of the Warning dialog box. Then click the check box next to the statement I have read and understand the consequences associated with performing this operation to confirm the information.
      5. Click OK.

2. After fault recovery is complete, check whether the applications and data are normal. If an application or data encounters an exception, contact Huawei technical support.
3. Perform configuration before reprotection.

   Before performing openGauss fault recovery reprotection, you need to manually recover the openGauss cluster at the original production site to ensure that the cluster is available.

4. Perform reprotection to protect services switched to the DR center.

   After fault recovery is complete, the application system is working at the DR site and protected groups become Invalid. You must perform reprotection to recover the replication status and synchronize the data in the DR site to the production site. Then, the original DR site becomes the new production site.

   

   To ensure that the protection and recovery configurations before reprotection do not affect the running of the protected group and recovery plan after reprotection, the system automatically clears the protection and recovery configurations after reprotection. After reprotection, you need to reconfigure the protection and recovery policies to ensure normal running of DR services.

   1. On the menu bar, select Utilization > Data Restore.
   2. Select the recovery plan for which you want to perform reprotection. In the Operation area, choose More > Reprotection.
   3. In the confirmation dialog box that is displayed, carefully read the content and click OK.