Hi Tobias, April 18, 2024 at 10:43 PM, "Tobias Langner" <tlangner+ceph@bitvalve.org> wrote:
While trying to dig up a bit more information, I noticed that the mgr web UI was down, which is why we failed the active mgr to have one of the standbys to take over, without thinking much...
Lo and behold, this completely resolved the issue from one moment to the other. Now `ceph -s` return 338 active+clean pgs, as expected and desired...
While we are naturally pretty happy that the problem resolved itself, it would still be good to understand Thank you that confirms my thought.
1. what caused this weird state in which `ceph -s` output did not match
The MGR provides the stats for it.
2. how a mgr failover could cause changes in `ceph -s` output, thereby
See above.
3. why `ceph osd df tree` reported a weird split state with only few
Likely the same. You'd need to go through the MGR log and see what caused the MGR to hang. Cheers, Alwin