Once the new sanitarium hosts running Buster and MariaDB 10.4 + Stretch are ready, we need to start moving the wikireplicas under them
All these run 10.4 so they can be moved without any blockers
10.1 replicas, they cannot be moved until we've got the green light from cloud-services-team as replication might break anytime:
This replica belongs to Analytics and it is probably better just to rebuild it as multi-instance+10.4+stretch rather than moving it under the new replicas T269211: Convert labsdb1012 from multi-source to multi-instance
Update: labsdb1012 is no longer, it has been converted to clouddb1021.