A script that pushes the public IP address of the running machine to DigitalOcean's DNS API's. It requires an existing A record to update. The resulting container image is roughly around 7 MB (thanks to Alpine Linux).

Assuming you already have a DigitalOcean account and your domain associated with it. Just add an A record with desired name and IP address. That's it!

Pick one of the options below using the following settings:

• DIGITALOCEAN_TOKEN: The token you generate in DigitalOcean's API settings.
• DOMAIN: The domain your subdomain is registered at. (i.e. foo.com for home.foo.com)
• NAME: Subdomain to use. (name in A record) (i.e. home for home.foo.com)
• SLEEP_INTERVAL: Polling time in seconds. (default: 300)

$ docker pull tunix/digitalocean-dyndns
$ docker run -d --name dyndns \
    -e DIGITALOCEAN_TOKEN="your_token_here" \
    -e DOMAIN="yourdomain.com" \
    -e NAME="subdomain" \
    -e SLEEP_INTERVAL=2 \
    tunix/digitalocean-dyndns

You can also create a cronjob using below command:

$ DIGITALOCEAN_TOKEN="your_token_here" DOMAIN="yourdomain.com" NAME="subdomain" SLEEP_INTERVAL=2 ./dyndns.sh