In order to continue with T239791: DB: perform rolling restart of mariadb daemons to pick up CA changes we'd need to restart MySQL on m1 host (db1135).
As we have to restart MySQL, we will also upgrade it to the newer version.
These are the databases m1 currently store:
bacula bacula9 etherpadlite librenms racktables rddmarc rt
The restart should only take a few seconds, but during that time, those databases won't be available.
Last time we operated on m1 was to promote a new host to master (T231403) , and we had to kill some connections on several services, but that should not be required as the server isn't changing this time, just getting restarted.
I think what needs more coordination is the backups part, based on the backups job schedule, @akosiaris @jcrespo any preference on when this work can be done, or rather, which days should we avoid? :-)
@ayounsi what about from your side? Any day we should avoid?