Ansible playbook to dynamic set NTP or DNS based on client/server destination IP.

note: You could of course use group_vars to get the same result.

Edit the /var/main.yml file and change the IPs of your dns or ntp servers. Base on the first 2 octets of the IP the client/server has, it will configure the settings.

in case the 1st 2 octets does not suits your needs, change the template regex.

nameserverXX: 192.168.x.x 
nameserverXY: 192.169.x.x 

ntpserver1: ntp1.domain.local
ntpserver2: ntp2.domain.local
ntpserver3: ntp3.domain.local

{% if "192.168" in ansible_all_ipv4_addresses[0].split(".")[0:2]|join(".")  %}
server {{ ntpserver1 }}  iburst
server {{ ntpserver2 }}  iburst
server {{ ntpserver3 }}  iburst

RedHat/CentOS 6.x

MIT

alens