Update template to use pool

defaults/main.yml

@@ -1,9 +1,13 @@
 ---
-chrony_ntpservers:
-  - 0.centos.pool.ntp.org
-  - 1.centos.pool.ntp.org
-  - 2.centos.pool.ntp.org
-  - 3.centos.pool.ntp.org
+#chrony_ntpservers:
+#  - 0.centos.pool.ntp.org
+#  - 1.centos.pool.ntp.org
+#  - 2.centos.pool.ntp.org
+#  - 3.centos.pool.ntp.org
+chrony_ntppools:
+  - 1.pool.ntp.org
+  - 2.pool.ntp.org
+  - 3.pool.ntp.org
 chrony_allowclients: false
 #chrony_clients:
 #  - 192.168.0.0/24

templates/chrony.conf.j2

@@ -1,8 +1,17 @@
 # Use public servers from the pool.ntp.org project.
 # Please consider joining the pool (http://www.pool.ntp.org/join.html).
+{% if chrony_ntpservers is defined or chrony_ntppools is defined %}
+{% if chrony_ntpservers is defined %}
 {% for ntpserver in chrony_ntpservers %}
 server {{ ntpserver }} iburst
 {% endfor %}
+{% endif %}
+{% if chrony_ntppools is defined %}
+{% for ntppool in chrony_ntppools %}
+pool {{ ntppool }} iburst
+{% endfor %}
+{% endif %}
+{% endif %}
 
 {% if chrony_clients is defined %}
 # Ignore stratum in source selection.