ansible-playbooks/roles/common/templates/hosts.j2

{% if ansible_controlled is defined and ansible_controlled != "" %}
#
# {{ ansible_controlled }}
#
{% endif %}

127.0.0.1 localhost.localdomain localhost
{% if hosts_fqdn and ansible_default_ipv4.address is defined %}
{{ ansible_default_ipv4.address }} {{ ansible_fqdn }} {{ ansible_hostname }}
{% endif %}
{% if hosts_fqdn and ansible_default_ipv6.address is defined %}
{{ ansible_default_ipv6.address }} {{ ansible_fqdn }} {{ ansible_hostname }}
{% endif %}
{% if hosts_static_lookup %}
{% for h in hosts_static_lookup %}
{{ h }}
{% endfor %}
{%endif %}

# The following lines are desirable for IPv6 capable hosts
::1             localhost       ip6-localhost   ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts