Comment 7 for bug 1523488

Reviewed: https://review.openstack.org/254867
Committed: https://git.openstack.org/cgit/openstack/fuel-library/commit/?id=d71c9b864bfd0931a01ed85fac743d8bad4c1744
Submitter: Jenkins
Branch: master

commit d71c9b864bfd0931a01ed85fac743d8bad4c1744
Author: Ivan Suzdal <email address hidden>
Date: Tue Dec 8 19:55:08 2015 +0300

    Use IP based regex for rsyslog

    From rsyslogd documentation:

      fromhost
        hostname of the system the message was received from
        (in a relay chain, this is the system immediately in
        front of us and not necessarily the original sender).
        This is a DNS-resolved name, except if that is not
        possible or DNS resolution has been disabled.

    So it might be either hostname or IP address, however,
    regex filter will work for IP address only.

    This commit forces IP usage of IP addresses only.

    Closes-Bug: #1523488

    Change-Id: I46e00f0273671a92126ce29a5bcebac257bedf03