route53-record-updater

This script is designed to update a single Route53 record.

Our primary use case for it is running it on an EdgeRouter or two in order to implement some kind of Dynamic DNS™.

Usage

Best practice:

• Get a static IP address from your provider.

Next-to-best practice:

• Get the binary: go get -v github.com/zerocube/route53-record-updater
• Create a wrapper script (see wrapper.sh) that exports the following environment variables:
  • HOSTED_ZONE_ID
  • RECORD_SET
  • RECORD_VALUE
  • AWS_ACCESS_KEY_ID
  • AWS_SECRET_ACCESS_KEY
  • AWS_SESSION_TOKEN (optional)
• Run the wrapper script (ensuring that it is also executable)
• Call the wrapper script via cron at an appropriate time interval (e.g. every 12 hours)

Worst practice (Don't do this):

• Manually compile an outdated version on your piece of embedded equipment that serves as your Internet gateway
• Run the script via go run, providing the access keys as parameters that will be visible in your shell's history file
• Run this script every 0.5 seconds, resulting in API rate limits