Hi,
On a cluster running Nautilus 14.2.11, the store.db data space usage
keeps increasing. It went from 5GB to 20GB in a year.
We even had the following warning and adjust ‘mon_data_size_warn’ to
20Gi => WARNING: MON_DISK_BIG( mon monitor1 is using a lot of disk space )
But the disk space increase is constant about 1.5G per month.
We did a 'ceph-monstore-tool /var/lib/ceph/mon/ceph-monitor1/ dump-keys
| awk '{print $1}'| uniq -c’ :
285 auth
2 config
10 health
1435 logm
3 mdsmap
153 mgr
1 mgr_command_descs
3 mgr_metadata
51 mgrstat
13 mon_config_key
1 mon_sync
7 monitor
1 monitor_store
5 monmap
234 osd_metadata
1 osd_pg_creating
1152444 osd_snap
965071 osdmap
622 paxos
It appears that the osd_snap is eating up all the space. We have about
1100 snapshots total (they rotate every 72h).
I took a look at https://tracker.ceph.com/issues/42012 and it might be
related. However, from the bug report, that particular issue doesn't
seem fixed in Nautilus, but my 14.2.16 cluster that has similar usage
doesn't have this issue.
Did anyone face the same issue and do you have a workaround/solution to
avoid mon’s db size increasing constantly ? Could a simple minor version
upgrade fix it or would I need to upgrade to Octopus?
--
Jean-Philippe Méthot
Senior Openstack system administrator
Administrateur système Openstack sénior
PlanetHoster inc.
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