Hi,
damage_type backtrace is rather harmless and can indeed be repaired
with the repair command, but it's called scrub_path.
Also you need to pass the name and not the rank of the MDS as id, it should be
# (on the server where the MDS is actually running)
ceph daemon mds.mds3 scrub_path ...
But you should also be able to use ceph tell since nautilus which is a
little bit easier because it can be run from any node:
ceph tell mds.mds3 scrub start 'PATH' repair
Paul
--
Paul Emmerich
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On Fri, Aug 16, 2019 at 8:40 AM Lars Täuber <[email protected]> wrote:
>
> Hi all!
>
> The mds of our ceph cluster produces a health_err state.
> It is a nautilus 14.2.2 on debian buster installed from the repo made by
> croit.io with osds on bluestore.
>
> The symptom:
> # ceph -s
> cluster:
> health: HEALTH_ERR
> 1 MDSs report damaged metadata
>
> services:
> mon: 3 daemons, quorum mon1,mon2,mon3 (age 2d)
> mgr: mon3(active, since 2d), standbys: mon2, mon1
> mds: cephfs_1:1 {0=mds3=up:active} 2 up:standby
> osd: 30 osds: 30 up (since 17h), 29 in (since 19h)
>
> data:
> pools: 3 pools, 1153 pgs
> objects: 435.21k objects, 806 GiB
> usage: 4.7 TiB used, 162 TiB / 167 TiB avail
> pgs: 1153 active+clean
>
>
> # ceph health detail
> HEALTH_ERR 1 MDSs report damaged metadata
> MDS_DAMAGE 1 MDSs report damaged metadata
> mdsmds3(mds.0): Metadata damage detected
>
> #ceph tell mds.0 damage ls
> 2019-08-16 07:20:09.415 7f1254ff9700 0 client.840758 ms_handle_reset on
> v2:192.168.16.23:6800/176704036
> 2019-08-16 07:20:09.431 7f1255ffb700 0 client.840764 ms_handle_reset on
> v2:192.168.16.23:6800/176704036
> [
> {
> "damage_type": "backtrace",
> "id": 3760765989,
> "ino": 1099518115802,
> "path": "~mds0/stray7/100005161f7/dovecot.index.backup"
> }
> ]
>
>
>
> I tried this without much luck:
> # ceph daemon mds.0 "~mds0/stray7/100005161f7/dovecot.index.backup" recursive
> repair
> admin_socket: exception getting command descriptions: [Errno 2] No such file
> or directory
>
>
> Is there a way out of this error?
>
> Thanks and best regards,
> Lars
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