When rsync pushes to a remote node with an unmounted drive and if
certain steps are not taken, rsync may attempt to write files to
the local drive at the location where the drive was mounted.
There are two suggested solutions for this issue:
1) Set the permissions for all mount points in /srv/node/
to root:root 755
2) Mount the drives elsewhere and symlink the drives to /srv/.../
The first method ensures that only root and not the swift user
can write in the /srv/.../ directories.
The second method will prompt a broken link issue if rsync
attempts to write to an unmounted drive.
Change-Id: I60ce4ed9ef8401768d5f78b6806cbb2e2a65303e
Closes-Bug: #1470576
89f5906286