Docker Powershell Dynu IP update

Dynu - Dynamic DNS. Automaic IP update in docker container.

You can find many implementations of the updater in the internet. My aim was to improve my knowledge on PowerShell7 + Docker stack.

PowerShell choice makes is compatible with wider range of platforms.

Some features

• In testing stage, makes it possible to validate your config (.env and Dynu account) before running the container.
• Does not send the update if IP have not changed.
• Health check, to make sure that all is good.
• Alpine based so have small size.

Setup

• Use .env-sample as a base of your .env config. There are some links to help you understand what goes where.
• docker-compose -f docker-compose.yml -f docker-compose.tests.yml up -build to run tests.
• docker-compose -f docker-compose.yml up -d -build to install.

Environment Variables

Environment Variable	Example	Purpose
DYNU_USERNAME	username	your login name in dynu.com
DYNU_DOMAIN	myhome.accesscam.org	your DDns hostname in dynu.com
DYNU_PASSWORD	mySecret	your ipupdate password in dynu.com
DYNU_APIKEY	a6De5034	REST API KEY for dynu.com
DYNU_SLEEP	120	sleep seconds between checks

Allthrough DYNU_APIKEY is only used for validation, all variables are mandatory.