URGENT: logm spam in ceph-mon store

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Hi,

We still suffer from a growing and growing monstore. Now we are at 80gb and it just does not stop. Any pointer would be appreciated. I opened bug: https://tracker.ceph.com/issues/53485

Since we did not suffer this problem in the past, was some logging added to mons in the recent releases ?

kind regards
 poelzi


On 30/11/2021 02:59, Daniel Poelzleithner wrote:
Hi,

for reasons we are not sure yet, ours ceph-mon grew to wopping 40GB for
a small 6 node cluster. Rebuilding a mon causes the same size on the new
node. After dumping the monstore-tools:

# cat /tmp/ceph-mon-keys.log| awk '{print $1}' | uniq -c



     200 auth
       2 config
      11 health
2036633 logm
     146 mds_health
       1 mds_metadata
     682 mdsmap
     948 mgr
       1 mgr_command_descs
       4 mgr_metadata
  622928 mgrstat
       2 mkfs
      59 mon_config_key
       1 mon_sync
       7 monitor
       1 monitor_store
      53 monmap
      21 osd_metadata
       1 osd_pg_creating
    4211 osd_snap
    1209 osdmap
     717 paxos


Is there a mechanism to burge those gazillon logm entries in a safe way ?

We even ran into storage problems because the mon was blowing up faster
then we could make space. Even after nodes run into health warings about
missing storage space on mon servers, some subsystem still decided to
spam the system into deadlock.

At least the growth stopped.

kind regards
  poelzi
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