Hi, On Tue, Dec 17, 2024 at 12:48 PM Janne Johansson <icepic.dz@gmail.com> wrote:
Ceph version 18.2.4 reef (cephadm) Hello, We have a cluster running with 6 Ubuntu 20.04 servers and we would like to add another host but with Ubuntu 22.04, will we have any problems? We would like to add new HOST with Ubuntu 22.04 and deactivate the Ubuntu 20.04 ones, our idea would be to update the hosts from Ubuntu 20.04 to 22.04. If anyone can give us some guidance, thank you very much.
If the new host uses the same ceph version, it will be fine.
It seems that mixing different versions also seems to work, at least on a small scale, light load, non-intensive app. I mixed up pacific and reef, on Ubuntu 22.04, 24.04 and Debian Stable. Nothing in the Ceph documentation says "don't do this". I did experience some file corruption, but I don't know if I can blame Ceph for that. FWIW, I think I used a Ceph config far outside the norm of conventional use: it mixed OS'es, it mixed Ceph releases, and it (initially) had one mon, one host and 2 OSD's and a week later three mons, two hosts, 4 OSD's, and later still three hosts and 6 OSD's and through-out this extended upgrade period, I was copying files into Ceph. I'm 99% sure that no one in the Ceph testing community tests setups like this, so maybe there's a bug. But I'm also using consumer-grade h/w so maybe the h/w is to blame. Cosmic rays, you know. -- Linas -- Patrick: Are they laughing at us? Sponge Bob: No, Patrick, they are laughing next to us.