Note
This feature is available starting from the MCP 2019.2.5 maintenance update. Before enabling the feature, follow the steps described in Apply maintenance updates.
You may need to restore a MAAS PostgreSQL database after a hardware or software failure or if you want to create a clone of the existing database from a backup. This section instructs you on how to run a restore of a MAAS PostgreSQL database using the Backupninja service.
To restore a MAAS PostgreSQL database using the Backupninja service:
Select one of the following options:
Restore the MAAS PostgreSQL database automatically as described in Restore the services using Backupninja pipeline.
Restore the MAAS PostgreSQL database manually:
Log in to the Salt Master node.
Include the following pillar to cluster/infra/maas.yml
to restore the MAAS PostgreSQL database from any database node:
classes:
- system.maas.region.single
- system.maas.region.restoredb
parameters:
_param:
backupninja_backup_host: <IP>
Apply the maas.region state to the corresponding nodes with MAAS.
Mirantis recommends running the following command using Linux GNU Screen or alternatives.
salt -C I@maas:region state.sls maas.region
Running this state restores the databases and creates a file
for every restored database in /root/maas/flags.
Caution
If you rerun the state, it will not restore the database
again. To repeat the restore procedure for any database,
first delete the database file from /root/maas/flags
and then rerun the maas.region state again.