Hello,
Quite an hold thread, but maybe this will help someone.
We had the same issue on our Ceph cluster.
It all came down to an erasure code profile with a missing setting.
In the logs of ceph-mgr (journalctl -xru ceph-mgr@<host>.service), we
saw the following error:
KeyError: 'm' description = f"ec:{profile['k']}+{profile['m']}" in
/usr/share/ceph/mgr/prometheus/module.py.
One of our erasure code profile was missing the setting "m" (which is
the number of parity chunks for a chunk of data, if I understood
correctly).
You can see your erasure code profile using :
ceph osd erasure-code-profile ls
And the settings of each code profile with :
ceph osd erasure-code-profile get <name>
We deployed a simple fix by editing the module.py file to handle this
scenario.
Replace (around l.1250)
if profile:
description = f"ec:{profile['k']}+{profile['m']}"
With
if profile:
if profile.get("m", None) is not None:
description = f"ec:{profile['k']}+{profile['m']}"
else:
description = f"ec:{profile['k']}"
Adrien
Site du CEA
Adrien JOUSSE
Ingénieur systèmes Unix
Direction de la Recherche Fondamentale (DRF)
DRF/IRFU/DEDIP//LIS
Centre de Saclay
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