Dynamic DNS

Update DDNS at Domain-DNS.com

How to Use This

This is only useful if you have your DNS at Domain-DNS.com, which is only an option if you use BareMetal.com as your domain register.

For the URL you want to update, there will be a "Remote IP Key" listed.

Then, supply the needed environmental variables in your docker-compose.yaml file:

  ddns:
    image: ghcr.io/minchinweb/ddns:1
    restart: unless-stopped
    environment:
      - PUID=${PUID}
      - PGID=${PGID}
      - DDNS_DOMAIN_NAME=<<your domain name>
      - DDNS_KEY=<<Remote IP Key>>
    volumes:
      - /etc/localtime:/etc/localtime:ro

Adding localtime as a volume will make the timestamps on your log files match your host timezone.

Then, on start up and about every 5 minutes afterwards, the IP address of your server will be checked. If it's the same as it was before, nothing happens; if it's changes, an update request is submitted.

Why I Created This

or, What Problems is This Trying to Solve?

I have a dynamic IP address and a URL for my Docker server. Automation seems like the smart way to keep the URL pointing to that IP address, even if that IP address changes.

Prior Art

This is based on my Python base image.

Known Issues

• Domain-dns sets their TTL ("Time To Live") to 20 minutes (and there doesn't seem to be a way to manually override that), so updates may take up to 40 minutes to show on end-users' machines.
• If you still can't connect to your server after this is working, you may need to configure port forwarding on your router. Also, your ISP may be blocking the port you are trying to connect on.
• I have no idea if this will work with any other DDNS service. Pull requests are welcomed though.