mon_osd_nearfull_ratio (unchangeable) ?

[Goncalo Borges <goncalo.borges@xxxxxxxxxxxxx>]

Dear Cephers...

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)

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

and I continue to have health warnings regarding near full osds.

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:

    # ceph daemon mon.rccephmon2 config show | grep mon_osd_nearfull_ratio
    "mon_osd_nearfull_ratio": "0.9",

There seems to be some discussion on the topic here: https://github.com/ceph/ceph/pull/7085

But in summary, it doesn't seem I am able to change this value.

Can someone clarify exactly what is the happening here?

Cheers
G.

-- 
Goncalo Borges
Research Computing
ARC Centre of Excellence for Particle Physics at the Terascale
School of Physics A28 | University of Sydney, NSW  2006
T: +61 2 93511937

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