Setting up a GeoDNS server, are custom nameservers required/adviced?
So i'm looking to setup a DNS server that picks the closest Varnish caching server available based on what country the request is coming from.
This tutorial looks very good however i'm curious if running custom nameservers is required and if not, adviced. Can I also use Namecheaps nameservers and point domains to my GeoDNS server from Namecheaps admin panel?
I'm also curious if I would have to setup records for every country possible in order to get optimal geo distrubtion going. For instance when I have 1 server in Germany and 1 in The Netherlands and someone has a geo location of Poland (e.g pol.geo.example.com), do I need to manually configure pol.geo.example.com to go to the German server IP. If so, I would love some tips on how to deal with the matter.