route53-updater

route53-updater

The route53-updater module can update an Record Set with the current IP of an machine. This can be useful if you have a single instance running in an auto scaling group. During startup of the EC2 instance you call the route53-updater to update the DNS entry to the new IP.

CLI Usage

Install route53-updater globally

npm install route53-updater -g

Create or update the DNS A entry for test.yourdomain.com to point to the public ip of the EC2 instance

route53-updater --action UPDATE --hostedZoneName yourdomain.com. --recordSetName test.yourdomain.com. 

The assumed defaults are

route53-updater --action UPDATE --hostedZoneName yourdomain.com. --recordSetName test.yourdomain.com. --ttl 300 --metadata public-hostname --type CNAME

The instance running the script needs the following IAM access rights:

{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Sid": "Stmt1424083772000",
			"Effect": "Allow",
			"Action": [
				"route53:ChangeResourceRecordSets",
				"route53:ListHostedZones",
				"route53:ListResourceRecordSets"
			],
			"Resource": [
				"*"
			]
		}
	]
}

Supported parameters:

• action: String
  • UPDATE: Update the DNS entry (delete if exists, and create)
  • DELETE: Create the DNS entry
  • CREATE: Create the DNS entry or fail if existing
• hostedZoneName: String - Name of your hosted zone (Must end with an dot!)
• recordSetName: String - Name of your record set (XYZ.hostedZoneName)
• ttl: Number - TTL in seconds (default 300)
• metadata: String - Metadata field to ue als the value (default public-hostname, http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html )
• type: String - Type of record set (default CNAME, http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html )