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Description of problem:
On a pacemaker-remote-node where sbd is enabled including the
pacemaker-watcher a watchdog-reboot is observed when the
pacemaker-remote-package is being updated.

Version-Release number of selected component (if applicable):
pacemaker-1.1.15 - any release till now

How reproducible:
100%

Steps to Reproduce:
1. Start pacemaker_remote on remote-node: systemctl start pacemaker_remote
2. Possibly wait till cluster has settled starting resources on remote-node
   and alike
3. yum reinstall pacemaker-remote

Actual results:
Watchdog-Reboot
empty /usr/lib/systemd/system/pacemaker_remote.service
leads to pacemaker_remote-service not able to start anymore

Expected results:
pacemaker_remote-service restarted during installation and
running as before

Additional info:
first research shows that it seems to be related with the scriptlet
in pacemaker-remote-package:
%postun remote
%systemd_postun_with_restart pacemaker_remote.service

stopping in one of the first scriptlets (%pre) executed during install
and started in one of the last (%posttrans) is working properly.

Issue is definitely not observed on cluster-nodes running pacemaker +
sbd with pacemaker-watcher.

This can be triggered when using SBD on remote nodes.  However, as of RHEL 7.3, SBD on remote nodes is *not* supported.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2016-2578.html