127.0.0.1  localhost
127.0.1.1  node-{{ groups['nodes'].index(inventory_hostname) + 1 }}

::1      localhost ip6-localhost ip6-loopback
ff02::1  ip6-allnodes
ff02::2  ip6-allrouters

{% for item in hostnames %}
{{ item.ip }}  {{ item.name }}
{% endfor %}