Route53 Dynamic DNS

r53update.rb

#!/usr/bin/env ruby
require 'aws-sdk'
require 'net/http'
require 'json'

REGION = 'us-east-1'
HOSTED_ZONE_ID = 'INSERT_HOSTED_ZONE_ID'
DOMAIN = 'INSERT_DOMAIN_NAME'

response = Net::HTTP.get('ipinfo.io', '/')
json = JSON.parse(response)

current_ip = json['ip']

route53 = Aws::Route53::Client.new(region: REGION)
resource = route53.list_resource_record_sets({hosted_zone_id: HOSTED_ZONE_ID, start_record_name: DOMAIN, max_items: 1})

route53_ip = resource.resource_record_sets[0].resource_records[0].value

unless route53_ip == current_ip
  # Update record to point to current IP address
  resource.resource_record_sets[0].resource_records[0].value = current_ip

  response = route53.change_resource_record_sets({
    hosted_zone_id: HOSTED_ZONE_ID,
    change_batch: {
      comment: "VpnIpUpdate",
      changes: [
        {
          action: "UPSERT",
          resource_record_set: resource.resource_record_sets[0]
        }
      ]
    }
  })
end

• Make sure you have ~/.aws/credentials populated with creds for an IAM user who has Route53 permissions enabled
• Make sure your have the 'aws-sdk' gem installed on your system