ceph version 0.80.4 (7c241cfaa6c8c068bc9da8578ca00b9f4fc7567f)
I recently managed to cause some problems for one of our clusters, we
had 1/3 of the OSDs fail and lose all the data.
I removed all the failed OSDs from the crush map, and did 'ceph osd
rm'. Once it finished recovering, I was left with a whole bunch of
'stale+active+clean' PGs. These had been hosted entirely on the OSDs
that failed.
So, there will be some data loss here. Luckily the majority of the data
is easily replaceable. I couldn't do a whole lot with these PGs, so I
ended up forcing ceph to recreate them, with:
ceph health detail | grep pg | awk '{ print $2 }' | xargs -n1 ceph pg
force_create_pg
This fixed most of them, though I'm now left with one that's hanging on
'creating'. Any suggestions for what I can do? There isn't any data to
lose in this pg, so I would be okay removing it, but I don't see any way
to do that. How can I force the OSD to create it again?
cluster e312b58c-0391-43d0-98e6-25a41bea6a70
health HEALTH_WARN 1 pgs stuck inactive; 1 pgs stuck unclean
monmap e3: 3 mons at {snip}, election epoch 50, quorum 0,1,2 {snip}
osdmap e3922: 11 osds: 11 up, 11 in
pgmap v1261502: 4722 pgs, 14 pools, 4344 GB data, 3314 kobjects
8668 GB used, 11803 GB / 20472 GB avail
1 creating
4721 active+clean
client io 449 kB/s rd, 0 B/s wr, 643 op/s
# ceph pg dump | grep creating
dumped all in format plain
3.15c 0 0 0 0 0 0 0
creating 2014-08-08 16:18:38.781245 0'0 0:0 [4,2]
4 [2,4] 2 0'0 0.000000 0'0 0.000000
# ceph pg 3.15c query
Error ENOENT: i don't have pgid 3.15c
# ceph pg 3.15c mark_unfound_lost revert
Error ENOENT: i don't have pgid 3.15c
If I try to force a scrub:
2014-08-08 16:41:38.016388 7f33270cd700 0 osd.2 3926 do_command r=0
2014-08-08 16:41:39.775253 7f33270cd700 0 osd.2 3926 do_command r=0
2014-08-08 16:41:42.491501 7f33270cd700 0 osd.2 3926 do_command r=0
2014-08-08 16:41:42.497906 7f33270cd700 0 osd.2 3926 do_command r=-2 i
don't have pgid 3.15c
2014-08-08 16:41:42.497911 7f33270cd700 0 log [INF] : i don't have pgid
3.15c
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