sovereign/roles/common/templates/etc_hosts.j2

127.0.1.1 {{ server_name }} {{ server_fqdn }}
127.0.0.1 localhost

::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts