Creating easy domain references to EC2 instances

dns.rb

#!/usr/bin/env ruby                                                             

require 'rubygems'
require 'fog'

ACCESS_KEY_ID='BLARGH'
SECRET_ACCESS_KEY='BLARGH'
ZERIGO_EMAIL='BLARGH'
ZERIGO_TOKEN='BLARGH'
ZERIGO_ZONE='BLARGH'

compute = Fog::Compute.new(
  :provider => 'AWS', 
  :aws_access_key_id => ACCESS_KEY_ID, 
  :aws_secret_access_key => SECRET_ACCESS_KEY
)

dns = Fog::DNS.new(
  :provider => 'Zerigo',
  :zerigo_email => ZERIGO_EMAIL, 
  :zerigo_token => ZERIGO_TOKEN
)

zone = dns.zones.get ZERIGO_ZONE

compute.servers.each do |server|
  if server.state == 'running' and server.tags.key? 'Name'
    puts "mapping %s.%s to %s" % [server.tags['Name'], zone.domain, server.dns_name]  
    zone.records.create(
      :ip => server.dns_name,
      :name => '%s.%s' % [ server.tags['Name'], 'zone.domain' ],
      :type => 'CNAME'
      )
  end
end