Working on roles. Using @arcimboldo 's ansible playbooks as inspiration

Author: brucellino

roles/common/templates/etc/hosts.j2

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+# This file is managed by Ansible.
+# taken from https://github.com/gc3-uzh-ch/ansible-playbooks 7/03/2014
+127.0.0.1 localhost.localdomain localhost
+
+{% if hosts %}
+{% for host in hosts|sort %}
+{% if host != 'localhost' %}
+{{ hostvars[host].ansible_default_ipv4.address }} {{ host }}
+{% endif %}
+{% endfor -%}
+
+{% else %}
+{% for host in groups['all']|sort %}
+{% if host != 'localhost' %}
+{{ hostvars[host].ansible_default_ipv4.address }} {{ host }}
+{% endif %}
+{% endfor %}
+
+{% endif %}

roles/common/templates/etc/ntp.conf.j2

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+driftfile /var/lib/ntp/ntp.drift
+
+
+# Enable this if you want statistics to be logged.
+#statsdir /var/log/ntpstats/
+
+statistics loopstats peerstats clockstats
+filegen loopstats file loopstats type day enable
+filegen peerstats file peerstats type day enable
+filegen clockstats file clockstats type day enable
+
+# Specify one or more NTP servers.
+
+# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
+# on 2011-02-08 (LP: #104525). See http://www.pool.ntp.org/join.html for
+# more information.
+server 0.ubuntu.pool.ntp.org
+server 1.ubuntu.pool.ntp.org
+server 2.ubuntu.pool.ntp.org
+server 3.ubuntu.pool.ntp.org
+
+# Use Ubuntu's ntp server as a fallback.
+server ntp.ubuntu.com
+
+# Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for
+# details.  The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions>
+# might also be helpful.
+#
+# Note that "restrict" applies to both servers and clients, so a configuration
+# that might be intended to block requests from certain clients could also end
+# up blocking replies from your own upstream servers.
+
+# By default, exchange time with everybody, but don't allow configuration.
+restrict -4 default kod notrap nomodify nopeer noquery
+restrict -6 default kod notrap nomodify nopeer noquery
+
+# Local users may interrogate the ntp server more closely.
+restrict 127.0.0.1
+restrict ::1