deploy.rb

require 'config/recipes/dns'

dns.rb

Capistrano::Configuration.instance.load do
  require 'activeresource'

  # make sure to add `set :slicehost_api_password, 'yourkey'` to your ~/.caprc
  set :slicehost_api_password, nil unless exists?(:slicehost_api_password)
  SLICEHOST_API_PASSWORD = slicehost_api_password

  class Zone < ActiveResource::Base
    self.site = "https://api.slicehost.com/"
    self.user = SLICEHOST_API_PASSWORD
  
    def self.find_or_create(origin)
      self.find_by_origin(origin)
    rescue ActiveResource::Redirection
      Zone.create(:origin => origin, :ttl => 86400)
    end
  
    def self.find_by_origin(origin)
      Zone.find(:conditions => {:origin => origin})
    end
  end

  class Record < ActiveResource::Base
    self.site = "https://api.slicehost.com/"
    self.user = SLICEHOST_API_PASSWORD
  
    def self.safe_create(*args)
      self.create(*args)
    rescue ActiveResource::ForbiddenAccess => e
      puts e
      false
    end
  end

  namespace :dns do
    task :list_zones do
      Zone.find(:all).each {|zone| puts zone.origin }
    end
  
    desc "Setup DNS on Slicehost"
    task :setup do
      domains.each {|domain|
        puts "Setting up #{domain} ..."
        zone = Zone.find_or_create(domain)
      
        Record.safe_create(:record_type => 'A', :zone_id => zone.id, :name => '*', :data => ip)
        Record.safe_create(:record_type => 'A', :zone_id => zone.id, :name => domain, :data => ip)
        Record.safe_create(:record_type => 'TXT', :zone_id => zone.id, :name => domain, :data => 'v=spf1 a ~all')

        (1..3).each{|e| Record.safe_create(:record_type => 'NS', 
                                           :zone_id => zone.id, 
                                           :name => domain, 
                                           :data => "ns#{e}.slicehost.net.")
        }
      }
    end
  end
end