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.
_______________________________________________
Thanks,
Raj
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