On 02-12-2024 21:53, alessandro@xxxxxxxxxxxxxxxxxx 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.
I would first upgrade Ceph to the newer version you want to use on the
_existing_ Ceph hosts (20.04), see [1].
After that you can replace the 20.04 hosts with 22.04 hosts using the
same Ceph version. One of the benefits of taking this approach is that
you decouple OS and Ceph upgrades. Any (performance) issues that might
pop-up can be attributed to either Ceph or OS.
While you can mix and match, why would you want to do that? I can tell
you it is not the intended way to run Ceph. There are even health checks
nowadays to inform users about these conditions (mixed versions,
incomplete upgrades, etc., see [2]).
Gr. Stefan
[1]: https://docs.ceph.com/en/reef/cephadm/upgrade/
[2]:
https://docs.ceph.com/en/reef/rados/operations/health-checks/#daemon-old-version
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