Re: How are you dealing with hammer -> jewel upgrades?

[Nathan Cutler <ncutler@suse.cz>]

On 05/10/2016 07:13 PM, Ken Dreyer wrote:
 > I was thinking about handling it in the OSD directly, particularly
 > since it already has the UID from --setuid.
 > http://tracker.ceph.com/issues/15733

Thanks, Ken, for reminding me of that tracker issue! I would rather 
implement the recursive ownership change for filestore-backed OSDs 
(assuming it's not a totally insane thing to be doing) in ceph-disk than 
in the OSD itself, for the following reasons.

ceph-disk already contains heuristics for determining the user/group to 
pass to ceph-osd [1] and "--setuser ceph --setgroup ceph" is hardcoded 
when starting ceph-osd via the systemd service [2].

If someone is passing a user/group other than "ceph" to the OSD via 
--setuser/--setgroup, they will be doing the same with ceph-disk (which 
also takes --setuser/--setgroup). Alternatively they will not be using 
ceph-disk at all.

Right?

Nathan

[1] 
https://github.com/ceph/ceph/blob/master/src/ceph-disk/ceph_disk/main.py#L951
[2] https://github.com/ceph/ceph/blob/master/systemd/ceph-osd%40.service#L12