Puppet with Satellite 6. Customize puppet modules

I am doing Satellite 6 POC. Trying to figure out how to configure puppet modules for different hosts group. I want to manage resolv.conf and ntp.conf with puppet, but wanted to give different values based on server group. For example I have a server group for Dallas servers in which I have a specific set of DNS and NTP servers. For another server group for Austin servers I have different set of DNS and NTP. How I can accomplish this with puppet modules.

Another thing I noticed is the clients are going out of sync. If I run puppet agent --test, it will show up in sync. How to keep the clients in sync automatically ?

Thanks
Biju Joseph.