Update AWS Route53 record

go program to

• check external public ip every 600 seconds
• update route53 entry if external ip has changed

(uses https://api.ipify.org to determine external ip)

Requirements

• aws account and cli credentials (better to create a specific IAM role for this)
• docker

Quickstart

• populate ~/.aws/config, ~/.aws/credentials
• cd cmd/r53updater; ./r53updater --fqdn <VALUE> --zone <VALUE>
• alternatively, fqdn and zone can be stored in enviroment variables; AWSFQDN, and AWSZONE

Docker

• make docker
• docker run --rm --init --read-only --name='r53updater' --net='host' --env AWSFQDN=<VALUE> --env AWSZONE=<VALUE> -v /full/path/to/.aws:/home/user/.aws r53updater:<VALUE>
• note: permissions on ~/.aws/config and ~/.aws/credentials should at least be 444. This is because when the directory is mounted in the container, its files will (probably) have a different uid and gid to the user running in the container.