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This Images is part of the local docker development environment. It provides a haproxy that serves as an reverse proxy in front of multiple Containers. This allows us to access multiple containers via nice URLs without the need to publish or know the ports of the containers.


When used together with cachalot or pygmy everything is already setup and ready to go. You don't have to worry more.

Start manually

   docker run -d -p 80:80 -p 443:443 --volume=/var/run/docker.sock:/tmp/docker.sock --name=amazeeio-haproxy amazeeio/haproxy

By default this Image will listen to port 80 and 443 for http and https connections. It is not forced though to this, with defining another port this Image also works, example:

   docker run -d -p 8080:80 -p 4443:443 --volume=/var/run/docker.sock:/tmp/docker.sock --name=amazeeio-haproxy amazeeio/haproxy

How it works

The container has docker-gen installed, which listens to the Docker socket for changes of containers.

Every container that has an environment variable AMAZEEIO set, docker-gen will generate from the template (haproxy.tmpl)[./haproxy.tmpl] and haproxy config and restart the haproxy.

Use with non-amazeeio containers

This container can not only be used for Containers started from Docker Images, it can reverse proxy any kind of Containers. In order to do so, start your container with the following environment variables:

  • AMAZEEIO - Tells docker-gen that this container should be handled (value does not matter, just use AMAZEEIO=AMAZEEIO)
  • AMAZEEIO_URL - the URL for which connections should be forwarded to by haproxy (if not set, falls back to the Container name. Plus make sure that your DNS resolves the given URL to the IP of the Docker Host)
  • AMAZEEIO_HTTP_PORT - the port were the container listens for HTTP Connections, this port also needs to be exposed via the container (falls back to 80 if not set)
  • AMAZEEIO_HTTPS_PORT - the port were the container listens for HTTPS Connections, this port also needs to be exposed via the container (falls back to 443 if not set)


    docker run --rm -e -e AMAZEEIO=AMAZEEIO -e AMAZEEIO_HTTP_PORT=80 -p 80 nginx

Problem resolving

The haproxy exposes it's status page on /stats (like: if used with There you can see the containers, their ports and their URLs for which reverse proxy entries are made.

If something doesn't work at all, run haproxy -f haproxy.cfg -d within the running container (it should be running even if there is an haproxy error), this will start haproxy in debug mode and should show you possible errors.

If all fails, join the slack channel at, we're glad to help.


For easier development, there is an docker-compose.yml file which starts the an container and mounts the template file into the container for easier development.


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