Ceph upgrade with separate storage

[adtn]

Hi,
we are currently running a proxmox 7.2 cluster with a separate ceph based storage. Both are using octopus. We now want to upgrade to pacific. Is there a recommended way to do this? E.g. first updating the storage and then upgrade each node of the proxmox cluster or should proxmox be updated first and then the storage?

 

[gurubert]

There is no recommended way as the different Ceph versions are compatible to each other. You can run an older Ceph cluster with newer clients and vice versa. In general, that is. There may be a few cases (global_id reclaim security update, tunables) where older clients cannot talk to an updated Ceph cluster any more.

But when going from a current octopus to a pacific there is no known issue.

I would always update the Ceph cluster first and then the clients. Remember to live migrate your VMs so that qemu+rbd picks up the new client libraries.