By default, nodes deployed with Director have standard FQDN in the format:
Which is fine but its nice to customize this a bit, no?
To do so, edit the following undercloud files:
and create/change the following parameter:
dhcp_domain = iaas.local (or whatever you prefer)
You also need to edit the deployment parameter:
NB: It looks like this will only apply to OSP 7, OSP 8 has some changes to make this easier