We accidentally found ourselves upgraded from 12.2.8 to 13.2.2 after a ceph-deploy install went awry (we were expecting it to upgrade to 12.2.9 and not jump a major release without warning)
Anyway .. as a result, we ended up with an mds journal error and 1 daemon reporting as damaged
Having got nowhere trying to ask for help on irc, we've followed various forum posts and disaster recovery guides, we ended up resetting the journal which left the daemon as no longer “damaged” however we’re now seeing mds segfault whilst trying to replay
/build/ceph-13.2.2/src/mds/
journal.cc: 1572: FAILED assert(g_conf->mds_wipe_sessions)
ceph version 13.2.2 (02899bfda814146b021136e9d8e80eba494e1126) mimic (stable)
1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x102) [0x7fad637f70f2]
2: (()+0x3162b7) [0x7fad637f72b7]
3: (EMetaBlob::replay(MDSRank*, LogSegment*, MDSlaveUpdate*)+0x5f4b) [0x7a7a6b]
4: (EUpdate::replay(MDSRank*)+0x39) [0x7a8fa9]
5: (MDLog::_replay_thread()+0x864) [0x752164]
6: (MDLog::ReplayThread::entry()+0xd) [0x4f021d]
7: (()+0x76ba) [0x7fad6305a6ba]
8: (clone()+0x6d) [0x7fad6288341d]
NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
full logs
We’ve been unable to access the cephfs file system since all of this started …. attempts to mount fail with reports that “mds probably not available”
Oct 28 23:47:02 mirrors kernel: [115602.911193] ceph: probably no mds server is up
root@mds02:~# ceph -s
cluster:
id: 78d5bf7d-b074-47ab-8d73-bd4d99df98a5
health: HEALTH_WARN
1 filesystem is degraded
insufficient standby MDS daemons available
too many PGs per OSD (276 > max 250)
services:
mon: 3 daemons, quorum mon01,mon02,mon03
mgr: mon01(active), standbys: mon02, mon03
mds: fido_fs-2/2/1 up {0=mds01=up:resolve,1=mds02=up:replay(laggy or crashed)}
osd: 27 osds: 27 up, 27 in
data:
pools: 15 pools, 3168 pgs
objects: 16.97 M objects, 30 TiB
usage: 71 TiB used, 27 TiB / 98 TiB avail
pgs: 3168 active+clean
io:
client: 680 B/s rd, 1.1 MiB/s wr, 0 op/s rd, 345 op/s wr
Before I just trash the entire fs and give up on ceph, does anyone have any suggestions as to how we can fix this?
root@mds02:~# ceph versions
{
"mon": {
"ceph version 13.2.2 (02899bfda814146b021136e9d8e80eba494e1126) mimic (stable)": 3
},
"mgr": {
"ceph version 13.2.2 (02899bfda814146b021136e9d8e80eba494e1126) mimic (stable)": 3
},
"osd": {
"ceph version 12.2.8 (ae699615bac534ea496ee965ac6192cb7e0e07c0) luminous (stable)": 27
},
"mds": {
"ceph version 13.2.2 (02899bfda814146b021136e9d8e80eba494e1126) mimic (stable)": 2
},
"overall": {
"ceph version 12.2.8 (ae699615bac534ea496ee965ac6192cb7e0e07c0) luminous (stable)": 27,
"ceph version 13.2.2 (02899bfda814146b021136e9d8e80eba494e1126) mimic (stable)": 8
}
}
