Docker NS1 Dynamic DNS

This updates DNS records in NS1 with the current IP (from ipify.org) every 5 minutes. The script runs under cron inside a lightweight Alpine-based Docker container.

NS1 is a DNS provider that offers a generous free plan (500k queries/month, 50 records) and an API.

Usage

docker run

docker run -d \
    -v /your/config.yml:/config.yml:ro \
    --env FREQUENCY=5 \
    microbug/ns1-dynamic-dns:latest

docker-compose

services:
  dynamic-dns:
    environment:
      - FREQUENCY=5
    image: microbug/ns1-dynamic-dns:latest
    volumes:
      - /your/config.yml:/config.yml:ro
    restart: unless-stopped

custom frequency

You can change the value of the FREQUENCY environment variable to make the script run every $FREQUENCY minutes. The default is every 5 minutes.

testing

To test the script, run it through docker run and append /dynamic-dns.py. This will run the script once, then kill the container. Example:

docker run --rm -v /your/config.yml:/config.yml:ro microbug/dynamic-dns:latest /dynamic-dns.py

Config file

A config.yml file must be passed or the container won't be able to do anything. The format for the config file can be seen in example-config.yml.