Comment 7 for bug 1662591

Reviewed: https://review.openstack.org/445265
Committed: https://git.openstack.org/cgit/openstack/charm-ceph-osd/commit/?id=2c5406b6b31f77776cd31fae02aefdc1c9bf00de
Submitter: Jenkins
Branch: master

commit 2c5406b6b31f77776cd31fae02aefdc1c9bf00de
Author: Billy Olsen <email address hidden>
Date: Mon Mar 13 16:54:18 2017 -0700

    Upgrade OSDs one at a time when changing ownership

    Some upgrade scenarios (hammer->jewel) require that the ownership
    of the ceph osd directories are changed from root:root to ceph:ceph.
    This patch improves the upgrade experience by upgrading one OSD at
    a time as opposed to stopping all services, changing file ownership,
    and then restarting all services at once.

    This patch makes use of the `setuser match path` directive in the
    ceph.conf, which causes the ceph daemon to start as the owner of the
    OSD's root directory. This allows the ceph OSDs to continue running
    should an unforeseen incident occur as part of this upgrade.

    Change-Id: I00fdbe0fd113c56209429341f0a10797e5baee5a
    Closes-Bug: #1662591