Question: did you run the pve8to9 script? Read their extensive documentation [0]on how to upgrade? Fix the stuff aforementioned script comes up with?
My cluster went from 6 to 7, 7 to 8 and recently 8 to 9, along with Ceph - all without a single problem.
Given it’s more or less Debian underneath, not too surprising I’d say? Granted, there’s always a chance for something to go sideways, however, it’s unlikely you’re the first person to encounter this problem and if you check their forums, you should find a solution.
My cluster went from 6 to 7, 7 to 8 and recently 8 to 9, along with Ceph - all without a single problem.
Given it’s more or less Debian underneath, not too surprising I’d say? Granted, there’s always a chance for something to go sideways, however, it’s unlikely you’re the first person to encounter this problem and if you check their forums, you should find a solution.
[0] https://pve.proxmox.com/wiki/Upgrade_from_8_to_9