Hi,
(In nautilus) I noticed that the acting set for a pg in
acting+remapped+backfilling (or backfill_wait) can violate the failure
domain rule.
We have a 3x pool replicated across racks. Following some host outage
I noticed several PGs like:
75.200 7570 0 7570 0 31583745536 0
0 3058 active+remapped+backfill_wait 55m
3208334'13480873 3208334:23611310 [596,502,717]p596
[596,502,424]p596 2020-05-28 05:44:42.604307 2020-05-28
05:44:42.604307
Checking those up and acting sets, I have:
OK: PG 75.200 has no failure domain problem in up set [596, 502,
717] with racks ['BA09', 'BA10', 'BA12']
WARN: PG 75.200 has a failure domain problem in acting set [596, 502,
424] with racks ['BA09', 'BA10', 'BA09']
If BA09 were to go down, the pg would drop below min_size.
(The full pg query output is at https://pastebin.com/rrEQMnyC)
Is this https://tracker.ceph.com/issues/3360 ?
# ceph osd dump | grep 75.200
pg_temp 75.200 [596,502,424]
Shouldn't we mark a PG degraded or similar to raise HEALTH_WARN if the
failure domain is violated?
Cheers, Dan
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