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About

This docker image is for being able to update the Dynamic DNS available from Dynu.com.

This image uses curl and crontabs to execute the curl command necessary to update with Dynu.

Dynu curl documentation: https://www.dynu.com/DynamicDNS/IPUpdateClient/cURL

How to Use This Image

Start This Container

Build the image

docker image build . --target=dynu_domain --tag dynu_dns

Run the image

docker run -d -e DYNU_PASSWORD=SHA256_PASSWORD -e DYNU_DOMAIN=example.domain.org dynu_dns

Via Docker-Compose

version: '3.7'

services:
  ddns:
    container_name: dynu_dns
    build:
      context: .
      target: dynu_domain
    environment:
      - DYNU_PASSWORD=SHA256_PASSWORD
      - DYNU_DOMAIN=example.domain.org
      - VERIFY_DYNU_CONFIG=true
      - TIME_INTERVAL=*/5 * * * *
    restart: always

Environment Variables

Environment Variable Optional Purpose Example Value Default
DYNU_ALIAS Yes* Update the specified Dynu alias
DYNU_PASSWORD No The Dynu password as MD5 to use to authenticate to Dynu
DYNU_DOMAIN Yes* Update the specified Dynu domain example.dynu.net
DYNU_USERNAME Yes* Update all domains under the specified Dynu username
TIME_INTERVAL Yes Set the time interval for calling the Dynu IP update API, must be specified in a cron format * * * * * */10 * * * *
UPDATE_IP_V4 Yes Update the IP v4 address false true
UPDATE_IP_V6 Yes Update the IP v6 address false true
VERIFY_DYNU_CONFIG Yes On container startup verify that the cURL command gets a successful response from Dynu false true

*Either a username has to provided, a hostname, or an alias, a hostname, and username.

Visit https://www.dynu.com/NetworkTools/Hash to get MD5 or SHA256 hash value of your password