Hi Brad
Thanks for replying.
Answers inline.
I am a bit confused about the 'unchachable' message we get in Jewel 10.2.2
when I try to change some cluster configs.
For example:
1./ if I try to change mon_osd_nearfull_ratio from 0.85 to 0.90, I get
# ceph tell mon.* injectargs "--mon_osd_nearfull_ratio 0.90"
mon.rccephmon1: injectargs:mon_osd_nearfull_ratio = '0.9'
(unchangeable)
mon.rccephmon3: injectargs:mon_osd_nearfull_ratio = '0.9'
(unchangeable)
mon.rccephmon2: injectargs:mon_osd_nearfull_ratio = '0.9'
(unchangeable)
This is telling you that this variable has no observers (i.e. nothing monitors
it dynamically) so changing it at runtime has no effect. IOW it is read at
start-up and not referred to again after that IIUC.
but the 0.85 default values continues to be showed in
ceph --show-config --conf /dev/null | grep mon_osd_nearfull_ratio
mon_osd_nearfull_ratio = 0.85
Try something like the following.
$ ceph daemon mon.a config show|grep mon_osd_nearfull_ratio
and I continue to have health warnings regarding near full osds.
So the actual config value has been changed but has no affect and will not
persist. IOW, this value needs to be modified in the conf file and the daemon
restarted.
2./ If I change in the ceph.conf and restart services, I get the same
behaviour as in 1./ However, if I check the daemon configuration, I see:
Please clarify what you mean by "the same behaviour"?
So, in my ceph.conf I've set 'mon osd nearfull ratio = 0.90' and
restarted mon and osd (not sure if those were needed) daemons everywhere.
After restarting, I am still getting the health warnings regarding near
full osds above 85%. If the new value was active, I should not get such
warnings.
# ceph daemon mon.rccephmon2 config show | grep mon_osd_nearfull_ratio
"mon_osd_nearfull_ratio": "0.9",
Use the daemon command I showed above.
Isn't it the same as you suggested? That was run after restarting
services so it is still unclear to me why the new value is not picked up
and why running 'ceph --show-config --conf /dev/null | grep
mon_osd_nearfull_ratio' still shows 0.85
Maybe a restart if services is not what has to be done but a stop/start
instead?
Cheers
Goncalo
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