consul_domain (default: 'consul'): shared parameter w/ lp-consul, specifies
the NS domain the Consul cluster is authoritative for. In case of 'foo', eg.
nslookup nginx.service.foo.
BIND can be configured to forward requests for the domain specified in
consul_domain to its local Consul agent. This makes Consul service discovery
available to standard DNS clients.
consul_publish_dns (default: false): Expose Consul service discovery to the
rest of the network through regular DNS. Needs consul_agent_enable to
function properly.