Comment 26 for bug 599342

@Serge correct - for security (and portability) reasons, we've decided to run ssh only and nothing else on the hosts - all other services run on guests - so the host is using one of it's own guests as it's DNS server. It's backup nameservers are on different hosts which are usually up, so we never noticed this issue - but this time, they were not available at the moment we rebooted. The result was all guests failed to start.

For now, we've just updated /etc/hosts on each machine to make sure they automatically resolve themselves even without nameservice - this seems to be a decent workaround for now.