I am honestly kinda curious how exactly you manage your servers and keep them up to date, I feel like there is a linux patch every week or so, which would usually require a reboot. Do you all deploy live patching, how you become aware of critical stuff in your otherwise busy lives, RSS?
How do you handle the database schema changes during updates? Have two databases and disable replication during the update? How do you sync changes that occur to the backup while/after the main is upgraded?