cfddns is a very simple utility that will automatically update an A record through Cloudflare's API with the current detected external IP address. The following environment variables drive its operation:

• CLOUDFLARE_EMAIL - email address of your cloudflare account
• CLOUDFLARE_TOKEN - api token
• CLOUDFLARE_ZONE - name of the zone to lookup the ID of
• RECORD - A record to update, will be added to the CLOUDFLARE_ZONE ex. self would set an A record for self.<CLOUDFLARE_ZONE>.
• INTERVAL - interval to wait between checking external address. defaults to 300s.

A docker image nickethier/cfddns is available on the Docker Hub.

Example:

$> docker run --rm -e CLOUDFLARE_EMAIL -e CLOUDFLARE_TOKEN -e CLOUDFLARE_ZONE=example.com -e RECORD=home nickethier/cfddns