GeoDNS in PowerDNS

[Nikki]

Used to use PHP for this, but since this is a lot cleaner I figured I'd share it.

https://github.com/nikkiii/powerdns-geodns

You can try it out by resolving cdn.meow.tf, it'll return one of the following ips:

• 199.19.227.51 (BuyVM, Las Vegas)
• 199.195.250.46 (BuyVM, New Jersey)
• 199.233.232.50 (QuickPacket, Atlanta)
• 107.161.16.20 (RamNode, Seattle)
• 37.187.20.216 (Kimsufi, France)

 

[InertiaNetworks-Ryan]

PowerDNS already has a module for this. (http://www.debiantutorials.com/install-configure-powerdns-geo-backend-cdngeographic-dns-blancing/)

There is also another project that does this on a bigger scale, http://gdnsd.org/. A talk about about gDNSd, https://www.youtube.com/watch?v=WF75IGx9svM.

 

[Nikki]

PowerDNS already has a module for this. (http://www.debiantutorials.com/install-configure-powerdns-geo-backend-cdngeographic-dns-blancing/)

There is also another project that does this on a bigger scale, http://gdnsd.org/. A talk about about gDNSd, https://www.youtube.com/watch?v=WF75IGx9svM.

PowerDNS' module doesn't support distance calculations, only country. I was going to use gdnsd, I just don't feel like messing with it to set it up the way I want (sql backend and all), so I wrote this.

 

[Francisco]

Blizten's setup always felt 'messy' anyway. It was a cool feature but for sure meh.

Pretty slick setup, though!

So how does powerdns talk with it then? Over the socket?

Francisco

 

[Nikki]

Blizten's setup always felt 'messy' anyway. It was a cool feature but for sure meh.


Pretty slick setup, though!


So how does powerdns talk with it then? Over the socket?


Francisco

PowerDNS supports different backends, one of them (which I used to use) being pipe which executes a command, and this one which was added in 3.2, which can use HTTP, Sockets, etc with JSON/RPC https://doc.powerdns.com/md/authoritative/backend-remote/ - Did some research and it's said that Unix sockets are the fastest and it's probably right, though you could easily use HTTP/TCP/ZeroMQ

 

[InertiaNetworks-Ryan]

The reason why UNIX sockets are faster is because theres no networking overhead. It's a point to point connection.

By that point you can just use those capabilities built into gdnsd to accomplish the same thing without external scripts. I only see your script usable in big countries like the U.S., Canada, Russia and Australia.

It seems like you're recreating this though, http://turtle.dereferenced.org/~kaniini/demo/jsoncb.html

I personally use powerdns's pipe backend with a ruby script that has the gem to parse it's protocol and return A records for our companies IP's when used in our stock rDNS format (ip-in-dashed-format.rdns.inertianetworks.net). That way I don't have to waste space in a database or generate the records myself for new blocks (just use what's needed). The IP's are filtered through our ARIN ORG-ID so it won't make valid rDNS's for other IP blocks besides our own.

There's more than one way to skin this cat I guess.