gistfile1.txt

require 'rubygems'
require 'aws-sdk'

r53 = AWS::Route53.new

# unique id - could be the instance id
instance_name  = 'webserver-autoscaling-{unique-id}.example.org'
public_ip      = '123.123.123.123'
hosted_zone_id = 'ABC123'


r53_options = {
    :comment => "auto scaling awesomness - *optional*",
    :changes => [{
        :action => "CREATE",
            :resource_record_set => {
                :type => "A",
                :resource_records => [{ 
                    :value => public_ip
                }],
                :name => instance_name,
                :ttl => 300
             }
    }]
}



# make sure check the response for errors 
r53.client.change_resource_record_sets(:hosted_zone_id => hosted_zone_id, :change_batch => r53_options)