[Sheepdog] corosync and dns

[Valerio Pachera]

Hi all, I have a hint for everybody: use ip addresses in the
corosync.conf file instead of host names because it might happen that
your dns server stop working for some time and you get something like
this:

on node1
# collie cluster info
running
Ctime                Epoch Nodes
2011-08-31 08:34:40      5 [192.168.2.27:7000]

on node2
# collie cluster info
running
Ctime                Epoch Nodes
2011-08-31 08:34:40      5 [192.168.2.59:7000]