Comment 4 for bug 1513889

Also, in addition to steps in #3 I had to manually do 'pkill -f corosync' on each node before I could properly `systemctl restart corosync` or before charm could report something other than

  hacluster-heat/7 blocked executing <addr> Pacemaker is down. Please manually start it.

. It appears to be that even after packages are purged, the related processes are not killed.