ovh-dynhost

Docker image to update an OVH dynhost regularly. Based on Alpine linux.

Why

A DynHost is used to assign a dynamic ip to a subdomain. This can be very useful to make your local development machine available via a public subdomain.

Configure OVH

In your OVH domain settings head over to the DynHost tab and follow the steps to create your dynhost.

Run container

The image is available via Docker Hub.

docker run \
  -e DYNHOST_DOMAIN_NAME=dynhost.example.com \
  -e DYNHOST_LOGIN=login \
  -e DYNHOST_PASSWORD=password \
  --restart always \
  --name ovh-dynhost \
  p4sca1/ovh-dynhost

Or via docker-compose:

version: "3"

services:
  ovh-dynhost:
    image: p4sca1/dynhost
    restart: always
    environment:
      DYNHOST_DOMAIN_NAME: dynhost.example.com
      DYNHOST_LOGIN: login
      DYNHOST_PASSWORD: password

Of course you need to insert your credentials.

This will update the dynhost every 15 minutes if the ip changed.

Updating the dynhost manually

If your ip changed and you can't wait 15 minutes for the next update to happen, you can update the dynhost manually.

docker container exec ovh-dynhost ./dynhost.sh

Or when using docker-compose:

docker-compose exec ovh-dynhost ./dynhost.sh

Checking for problems

The docker container will echo debug messages whenever it tries to update the dynhost. You can access them via

docker container exec ovh-dynhost cat /usr/src/app/dynhost.log

Or when using docker-compose:

docker-compose exec ovh-dynhost cat /usr/src/app/dynhost.log