Dear all,
during our upgrade from octopus to pacific the MGR suddenly started logging messages like this one to audit.log:
2024-12-10T10:30:01.105524+0100 mon.ceph-03 (mon.2) 3004 : audit [INF] from='mgr.424622547 192.168.32.67:0/63' entity='mgr.ceph-03' cmd=[{"prefix": "osd pg-upmap-items", "format": "json", "pgid": "1.60", "id": [1054, 1125]}]: dispatch
Apparently, the balancer got enabled and tried to do something. However, we never enabled pg-upmap on our cluster, because we still have jewel clients from the museum connected. Therefore, I'm pretty certain that all of these upmap requests either failed or are scheduled and pending.
To be sure, I would like to confirm that nothing happened. How can I list upmap items and scheduled+pending upmap operations? If there are any, how do I delete these? I really would like to avoid that these requests start hurting in a few years from now. I looked at the documentation. Unfortunately, its the usual disease[1], commands for setting all sorts of stuff are documented, but commands to query anything seem to be missing.
This workaround
[root@gnosis osdmaps]# ceph osd dump -f json-pretty | grep upmap
"pg_upmap": [],
"pg_upmap_items": [],
indicates nothing is screwed up yet. However, I would really like to know what happened to the MGR commands and where they are now. How do I confirm they went to digital heaven?
[1] There are "ceph osd pg-upmap-items : set upmap items" and "ceph osd rm-pg-upmap-items : clear upmap items" commands. Why would anyone ever need a "ceph osd ls-pg-upmap-items"?? I found out that I can write it myself (https://ceph-users.ceph.narkive.com/h7y24SDg/stale-pg-upmap-items-entries-after-pg-increase and https://gitlab.cern.ch/ceph/ceph-scripts/blob/master/tools/upmap/upmap-remapped.py#L102). However, a good API is always symmetric to make it *easy* for users to check and fix screw-ups.
Thanks and best regards,
=================
Frank Schilder
AIT Risø Campus
Bygning 109, rum S14
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