If the overall plan is to have all the ceph related processes (osd/mon/rgw etc) to be running as a ceph user - which I think sounds correct - it would remove some of the concerns related to ownership, and I'm not sure these processes should be running as root. I'd be happy to give that a go next week and see how I go. In that case, it might be worth canning this PR until then - it would need to be changed in anycase!  