Merge pull request #138 from tilsammans/ntp

Make the ntp pool configurable

roles/common/tasks/main.yml

   apt: pkg=unattended-upgrades state=installed
   when: ansible_distribution == 'Debian' or ansible_distribution == 'Ubuntu'
 
-- name: Install ntp
-  apt: pkg=ntp state=installed
-
-- name: Configure ntp
-  template: src=ntp.conf.j2 dest=/etc/ntp.conf
-  notify:
-    - restart ntp
-
 - name: Apticron email configuration
   template: src=apticron.conf.j2 dest=/etc/apticron/apticron.conf
 
-- name: Ensure ntpd is running and enabled
-  service: name=ntp state=started enabled=yes
-
 - name: Disable default Apache site
   command: a2dissite 000-default removes=/etc/apache2/sites-enabled/000-default
   notify: restart apache
 - include: ssl.yml tags=ssl
 - include: ufw.yml tags=ufw
 - include: security.yml tags=security
+- include: ntp.yml tags=ntp

roles/common/tasks/ntp.yml

+---
+# Defines tasks applicable for NTP (Network Time Protocol)
+
+- name: Install ntp
+  apt: pkg=ntp state=installed
+
+- name: Configure ntp
+  template: src=ntp.conf.j2 dest=/etc/ntp.conf
+  notify:
+    - restart ntp
+
+- name: Ensure ntpd is running and enabled
+  service: name=ntp state=started enabled=yes
+

roles/common/templates/ntp.conf.j2

 filegen peerstats file peerstats type day enable
 filegen clockstats file clockstats type day enable
 
-# Use servers from the NTP Pool Project
-server 0.north-america.pool.ntp.org
-server 1.north-america.pool.ntp.org
-server 2.north-america.pool.ntp.org
-server 3.north-america.pool.ntp.org
+# Use servers configured via Ansible
+{% for server in ntp_servers %}
+server {{ server }}
+{% endfor %}
 
 # fallback
 server tick.usno.navy.mil

vars/defaults.yml

 friendly_networks:
   - ""
 
+# ntp
+ntp_servers:
+  # use nearby ntp servers by default
+  - 0.pool.ntp.org
+  - 1.pool.ntp.org
+  - 2.pool.ntp.org
+  - 3.pool.ntp.org
+  # use servers tailored to the server location
+  # See http://www.pool.ntp.org/en/use.html
+  # - 0.north-america.pool.ntp.org
+  # - 1.north-america.pool.ntp.org
+  # - 2.north-america.pool.ntp.org
+  # - 3.north-america.pool.ntp.org
+
 # database
 db_admin_username: 'postgres'
 # db_admin_password: (required)