best practice: proxmox keep up to date

I do the following:

-> set the ha group for a node to no-fallback (if not yet done)
-> migrate out all VM's via bulk migrate (view memory load of the servers)
-> apt-get update; apt-get dist-upgrade on the node
-> reboot
-> check if anything is working
-> unset no-fallback -> all VM's will migrate back (or do it by hand)

repeat that for every node.

there will be no downtime except for the very short unreachability of a vm during live migration
 
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