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OpenStack HA database backup and restoration


Our production OpenStack environment is set up by Mirantis OpenStack 6.1 HA on bare metal servers, where My SQL with Galera is implemented with true active/active HA. We need to set up database backup and restoration procedure for the environment.

I have tested the procedure documented on the page The controller chosen to back up and restore the database is not the mysql master node. The restoration failed on step 6 'Start mysqld on the first controller' that mysqld cannot be started, always looking for the master mysql.

Any experience with database backup and restoration with Mirantis Fuel 6.1 HA? Thanks very much.