Comment 8 for bug 1649339

Reviewed: https://review.openstack.org/420773
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-repo_server/commit/?id=248b2d6c94b0c9c963c0226c8d6cb6c897a52520
Submitter: Jenkins
Branch: stable/newton

commit 248b2d6c94b0c9c963c0226c8d6cb6c897a52520
Author: Cameron Loader <email address hidden>
Date: Wed Jan 18 16:07:03 2017 -0600

    Fix apt-cacher-ng file owners during rsync

    The lsyncd service runs as the 'nginx' user such that files sync'd
    from the master node to the backups will have 'nginx' as the owner.
    However, the apt-cacher-ng service needs to be the owner to function
    properly. This fix consolidates the pre and post sync tasks into
    a script that can be called by lsyncd. The script can then change
    the file owners as needed before and after the rsync. The owners
    need to be 'nginx' before the rsync so that lsyncd can update
    files and 'apt-cacher-ng' after the sync so the cacher service works.

    Additionally, setup lsyncd to sync each service's directory separately
    rather than being rsync'd all together. This avoids lsyncd bouncing
    services when their respective files are not being sync'd.

    Backport modified to work with Upstart.

    Change-Id: Ifaba17b89035398917f2b3257574e18eb9027c08
    Closes-bug: #1649339
    (cherry picked from commit 1169edc47be92943690983a6d10857761038b473)