Used to use ddclient for this, but it stopped working for whatever reason. Made this to use in the meantime.

Usage

Run the docker container with the following environment variables, and it should just work.

• ZONE - The CloudFlare zone you are managing. If your record is a subdomain, this should be the MAIN domain, not the subdomain. example.com
• RECORD - The specific A record you want to assign the IP address to. dynamic.example.com
• CF_API_KEY - Your CloudFlare API Key (required to use the API)
• IP_SERVICE - A simple web service that echos back your ip address (such as cmmarslender/ip-echo). Your IP address MUST be the ONLY content this service returns in the body.
• INTERVAL - How often to check the IP, in seconds. Defaults to 300 (5 minutes)

docker run -it -e ZONE=example.com -e RECORD=dynamic.example.com -e CF_API_KEY=abc123 -e IP_SERVICE=https://ipecho.example.com cmmarslender/cf-dynamic-ip