FYI you can also set the balancer mode to crush-compat, this way even if the balancer is re enabled for any reason error messages will not occurs. https://docs.ceph.com/en/pacific/rados/operations/balancer/ On Thu, Dec 12, 2024, 15:28 Janne Johansson <icepic.dz@gmail.com> wrote:
I have clusters that have been upgraded into "upmap"-capable releases, but in those cases, it was never in upmap mode, since these clusters would also have jewel-clients as lowest possible, so if you tried to enable balancer in upmap mode it would tell me to first bump clients to luminous at least, then allow upmap mode on the balancer.
Den tors 12 dec. 2024 kl 14:37 skrev Matt Vandermeulen < storage@reenigne.net>:
As you discovered, it looks like there are no upmap items in your cluster right now. The `ceph osd dump` command will list them, in JSON as you show, or you can `grep ^pg_upmap` without JSON as well (same output, different format).
I think the balancer would have been enabled by default in Nautilus, I'm surprised this hit you now. You can make sure it's off with `ceph balancer off` so that it won't do anything in the future, and check its status with `ceph balancer status`.
Thanks, Matt
On 2024-12-12 08:37, Frank Schilder wrote:
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-af...
and
https://gitlab.cern.ch/ceph/ceph-scripts/blob/master/tools/upmap/upmap-remap... ).
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 _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-leave@ceph.io
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