dns-fifty-three

A DynDNS-like clone using Amazon Route53, with conditional updates.

Plugins allow the DNS updates to be fired only when the conditions set by the plugin rules are true.

Currently, the only rule is to check if the machine is connected to a particular wireless SSID, as I was sick of the DynDNS agent updating my DNS records for my home IP to be wherever the hell I happened to be connected to.

And that will probably be all they ever do ;)

Pre-requisites

A YAML parser is required for the config files.

pip install pyyaml

BOTO is required to communicate with Route53.

sudo pip install -U boto

Plugin architecture

Plugins are written in Python, and live in the directory check-plugins.

All plugins need to consist of a class, accepting 2 required arguments plugin_dir, conf, and 1 optional argument logger in the constructor. The only requisite method is run(), this must return a boolean True or False to indicate if the check passed.

class TruthCheck ():

  conf = {}

  def __init__(self, plugin_dir, conf, logger):

        # do something

  def run(self):

        return True

Starting the service in the foreground

This will die with the SSH session

python dns-53-service.py foreground

Starting the service as a daemon

python dns-53-service.py start

Stopping the service

python dns-53-service.py stop

Restarting the service

python dns-53-service.py restart