We are planning to migrate and upgrade an existing production Ceph cluster and would like to confirm the recommended approach.

Current setup: - OS: CentOS 7.9 - Ceph: Nautilus 14.2.22 - Deployment: bare metal - Services: OSD, MON and RGW

Goals: - Move away from CentOS 7 (EOL) - Upgrade Ceph to a supported release - Use Ubuntu LTS as the target OS

Our current plan is: 1. Introduce new nodes running Ubuntu 22.04 2. Gradually replace CentOS 7 nodes while keeping Ceph at Nautilus 3. After OS migration is complete, upgrade Ceph step by step (Nautilus -> Octopus -> Pacific -> Quincy / Reef)

We would like to confirm: 1. Is node replacement generally preferred over in-place OS upgrades for production Ceph clusters? 2. Is Ubuntu 22.04 currently the recommended OS for production deployments? 3. Is Ubuntu 24.04 still considered early for Ceph production use?

Any feedback or experience would be appreciated.

We have done the same, but in our case we did: Centos7 -> upgrade ceph to Octopus (latest one can find for C7) Switch OS one host at a time to Ubuntu 20.x (can install octopus) Upgrade ubuntu 20.x hosts to Quincy or Reef Upgrade ubuntu OS to 22.x (or 24.x) Upgrade to Squid,Tentacle or wherever you plan to end up. Takes a long time on the calendar but works. -- May the most significant bit of your life be positive.