Ceph » RADOS

When we increase the debug_mon level to 10, then rm the setting, the effective log level is stuck at 10 in the ceph-mon log file.

1. Log level is 1/5 by default.
2. We increase the log level to 10, and the log file correctly:

# ceph config set mon.`hostname -s` debug_mon 10
# ceph daemon mon.`hostname -s` config get debug_mon
{
    "debug_mon": "10/10" 
}
# tail -n1 /var/log/ceph/ceph-mon.cepherin-mon-7cb9b591e1.log 
2019-11-14 11:02:29.589 7f8940003700 10 mon.xxx@0(leader).mgr e1305 no change

3. Now we rm this custom config, which seems to be seen by the mon, but the log level doesn't change:

# ceph config rm mon.`hostname -s` debug_mon
# ceph daemon mon.`hostname -s` config get debug_mon
{
    "debug_mon": "1/5" 
}
# tail -n1 /var/log/ceph/ceph-mon.cepherin-mon-7cb9b591e1.log 
2019-11-14 11:03:46.457 7f8940003700 10 mon.xxx@0(leader) e19 reset/close on session unknown.0 

For some reason the mon is not noticing this config change back to the default.

Thanks!