I have a new production 3-node Galera (MariaDB 10.2) cluster, and am looking for advice on backups. My current plan is twofold:
Replicate one node to a non-clustered slave, and schedule mysqldumps on the slave.
Do full VM backups of one Galera node with a pre-freeze / post-thaw script which stops and then restarts mysqld.
I am particularly interested for feedback on the second point (VM backup). Is this an acceptable strategy?