On Tue, Aug 7, 2018 at 6:27 PM Raju Rangoju <ra...@chelsio.com> wrote:
> Hi,
>
>
>
> I have been running into some connection issues with the latest ceph-14
> version, so we thought the feasible solution would be to roll back the
> cluster to previous version (ceph-13.0.1) where things are known to work
> properly.
>
>
>
> I’m wondering if rollback/downgrade is supported at all ?
>
>
>
> After compiling/starting ceph-13 I’m running into a permission error.
> Basically it complains about the incompatibility of disk layout (ceph-13
> mimic vs ceph-14 nautilus)
>
>
>
> 2018-08-07 10:41:00.580 2b391528e080 -1 ERROR: on disk data includes
> unsupported features: compat={},rocompat={},incompat={11=nautilus ondisk
> layout}
>
> 2018-08-07 10:41:00.580 2b391528e080 -1 error checking features: (1)
> Operation not permitted
>
> 2018-08-07 10:41:11.161 2b16a7d14080 0 set uid:gid to 167:167 (ceph:ceph)
>
> 2018-08-07 10:41:11.161 2b16a7d14080 0 ceph version 13.0.1-3266-g6b59fbf
> (6b59fbfcc6bbfd67193e1c1e142b478ddd68aab4) mimic (dev), process (unknown),
> pid 14013
>
> 2018-08-07 10:41:11.161 2b16a7d14080 0 pidfile_write: ignore empty
> --pid-file
>
>
>
>
>
> I thought allowing permissions to mon would fix it (see below), but
> apparently ceph command hangs. So it didn’t allow permissions.
>
>
>
> ceph auth add osd.44 osd 'allow *' mon 'allow profile osd' -i
> /var/lib/ceph/osd/ceph-44/keyring
>
>
>
> [root@hadoop1 my-ceph]# ceph -s
>
> 2018-08-07 10:59:59.325 2b5c26347700 0 monclient(hunting): authenticate
> timed out after 300
>
> 2018-08-07 10:59:59.325 2b5c26347700 0 librados: client.admin
> authentication error (110) Connection timed out
>
> [errno 110] error connecting to the cluster
>
>
>
> Has anyone tried ceph rollback before? Any help is greatly appreciated.
>
Unfortunately this is generally not possible. Disk encodings change across
major versions and the old code can't understand what's been written down
once the new code runs.
-Greg
>
>
> Thanks,
>
> Raj
>
>
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>
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