Most of ceph clients are on Ubuntu 20.04 and Ubuntu 22.04. The version of the ceph-common package on Ubuntu 22.04 is still 17.2.6. So, I would not upgrade our ceph clusters to Reef until most of ceph clients are natively supported by OS.

As pre-upgrade checklist, I ran three commands.

sudo ceph orch ps

sudo ceph orch ls

sudo ceph osd pool ls detail

Then, I compare the output from them with those after upgrade.

Before upgrades of any production Ceph clusters, I try to do with a test cluster of the same configuration.