Re: PGs stuck peering (looping?) after upgrade to Luminous.

[Paul Emmerich <paul.emmerich@xxxxxxxx>]

Did you finish the upgrade of the OSDs? Are OSDs flapping? (ceph -w) Is there anything weird in the OSDs' log files?

Paul

2018-07-11 20:30 GMT+02:00 Magnus Grönlund <magnus@xxxxxxxxxxx>:

Hi,

Started to upgrade a ceph-cluster from Jewel (10.2.10) to Luminous (12.2.6)

After upgrading and restarting the mons everything looked OK, the mons had quorum, all OSDs where up and in and all the PGs where active+clean.

But before I had time to start upgrading the OSDs it became obvious that something had gone terribly wrong. 

All of a sudden 1600 out of 4100 PGs where inactive and 40% of the data was misplaced!

The mons appears OK and all OSDs are still up and in, but a few hours later there was still 1483 pgs stuck inactive, essentially all of them in peering!

Investigating one of the stuck PGs it appears to be looping between “inactive”, “remapped+peering” and “peering” and the epoch number is rising fast, see the attached pg query outputs.

We really can’t afford to loose the cluster or the data so any help or suggestions on how to debug or fix this issue would be very, very appreciated!

    health: HEALTH_ERR

            1483 pgs are stuck inactive for more than 60 seconds

            542 pgs backfill_wait

            14 pgs backfilling

            11 pgs degraded

            1402 pgs peering

            3 pgs recovery_wait

            11 pgs stuck degraded

            1483 pgs stuck inactive

            2042 pgs stuck unclean

            7 pgs stuck undersized

            7 pgs undersized

            111 requests are blocked > 32 sec

            10586 requests are blocked > 4096 sec

            recovery 9472/11120724 objects degraded (0.085%)

            recovery 1181567/11120724 objects misplaced (10.625%)

            noout flag(s) set

            mon.eselde02u32 low disk space

 

  services:

    mon: 3 daemons, quorum eselde02u32,eselde02u33,eselde02u34

    mgr: eselde02u32(active), standbys: eselde02u33, eselde02u34

    osd: 111 osds: 111 up, 111 in; 800 remapped pgs

         flags noout

 

  data:

    pools:   18 pools, 4104 pgs

    objects: 3620k objects, 13875 GB

    usage:   42254 GB used, 160 TB / 201 TB avail

    pgs:     1.876% pgs unknown

             34.259% pgs not active

             9472/11120724 objects degraded (0.085%)

             1181567/11120724 objects misplaced (10.625%)

             2062 active+clean

            1221 peering

             535  active+remapped+backfill_wait

             181  remapped+peering

             77   unknown

             13   active+remapped+backfilling

             7    active+undersized+degraded+remapped+backfill_wait

             4    remapped

             3    active+recovery_wait+degraded+remapped

             1    active+degraded+remapped+backfilling

 

  io:

    recovery: 298 MB/s, 77 objects/s

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Paul Emmerich

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