DNSUpdater

This package allows you to set up a service that updates DNS records using the DigitalOcean API. Its main purpose is being a target for other clients that only allow GET requests to send updates to DDNS services, e.g., routers like Fritz!Box.

Usage

You can either use the ffittschen/dns-updater image on DockerHub, or build the image on your own using the instructions below.

DockerHub

docker  run -it -d \
    -p 8080:80 \
    -e USERNAME=john_doe \
    -e PASSWORD=change_this_to_some_secure_password \
    -e API_KEY=your_digitalocean_api_key \
    -e ENVIRONMENT=production \
    --name dns-updater \
    ffittschen/dns-updater:latest

Alternatively, you can also create a .env file:

USERNAME=john_doe
PASSWORD=change_this_to_some_secure_password
API_KEY=your_digitalocean_api_key
ENVIRONMENT=production

And then change the command to the following to use the .env file:

docker  run -it -d \
    -p 8080:80 \
    --env-file .env \
    --name dns-updater \
    ffittschen/dns-updater:latest

Build from Source / GitHub

git clone https://github.com/ffittschen/DNSUpdater
git checkout master
cd DNSUpdater
cp .env.sample .env
$EDITOR .env
docker build -t ffittschen/dns-updater:latest .
docker run -it -d -p 8080:80 --env-file .env --name=dns-updater ffittschen/dns-updater:latest

Ports

API

DNSUpdater provides a very simple interface, it only has one path: /api/v1/domains/updateRecord. To update a DNS record of a domain, you need to execute a GET request targeting the mentioned path and provide a few query parameters:

In addition to the query parameters, you need to authenticate the request using basic auth with the username and password provided as environment variables to the docker container:

The header value is the username and password concatenated with a colon as separator and then encoded to base64. You can create the string by calling this command in your terminal:

echo -n john_doe:some_secure_password | base64

Prerequisites

Since this is a DNS Updater, you need to make sure that a record with the name that you pass as a query parameter already exists in your DigitalOcean account.