docker-cloud-subdomains

A Docker Cloud app which automatically makes other apps in your Docker Cloud account accessible as Heroku-style subdomains (e.g. myapp.example.com).

Getting started

1. Create a stack on Docker Cloud using this stack file, filling in your Docker Cloud details and setting DOCKERCLOUD_SUBDOMAINS_DOMAIN to the domain name you want subdomains to appear on:

    traefik:
      image: traefik
      command: --web
      ports:
        - "80:80"
    updater:
      image: bfirsh/docker-cloud-subdomains
      environment:
        - "DOCKERCLOUD_SUBDOMAINS_DOMAIN=example.com"
        - "DOCKERCLOUD_USER"
        - "DOCKERCLOUD_APIKEY"
      links:
        - traefik
   

2. Get the address of the traefik service that you have just created in Docker Cloud (something ending with .svc.dockerapp.io). Set up a wildcard CNAME on the domain you want to use and point it at the service address.

3. You can now set the label sh.fir.subdomains.subdomain and sh.fir.subdomains.port on containers in your Docker Cloud apps to to expose ports under a particular subdomain. For example, you might put something like this in your stack file to make port 80 available at myapp.example.com:

    web:
       image: oscorp/myapp
       labels:
         - "sh.fir.subdomains.subdomain=myapp"
         - "sh.fir.subdomains.port=80"