route53-updater

The route53-updater module can update a Route 53 Record Set with the current IP or hostname 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.

Port of https://github.com/taimos/route53-updater/

Usage

Install route53-updater globally

npm install route53-updater -g

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

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

or

route53-updater --action UPDATE --hostedZoneId XXXXXXXXXXXXX --recordSetName test.yourdomain.com. 

The assumed defaults are

route53-updater --action UPDATE --hostedZoneName yourdomain.com. --recordSetName test.yourdomain.com. --ttl 60 --metadata public-hostname --type CNAME

By default route53-updater will lookup the IP address against the Amazon Metadata Service. If running outside Amazon, you can use the first IPv4 address on an interface by specifying an --iface option

route53-updater --action UPDATE --hostedZoneName yourdomain.com. --recordSetName test.yourdomain.com. --iface eth0

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",
				"route53:GetChange"
			],
			"Resource": [
				"*"
			]
		}
	]
}

Supported parameters:

• action: String (required)
  • 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 (either hostedZoneName or hostedZoneId is required) - Name of your hosted zone (Must end with an dot!)
• hostedZoneId: String (either hostedZoneName or hostedZoneId is required) - Id of your hosted zone
• recordSetName: String (required) - Name of your record set (XYZ.hostedZoneName)
• ttl: Number (optional, default 60) - TTL in seconds
• metadata: String (optional, default public-hostname) - Metadata field to use as the value (http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html)
• type: String (optional, default CNAME) - Type of record set (http://docs.aws.amazon.com/Route53/latest/DeveloperGuide/ResourceRecordTypes.html)

Breaking changes

Update from 0.2.X to 1.0.X

No breaking changes!

Update from 0.1.X to 0.2.X

Added "route53:GetChange" to the IAM access rights.