Intoduction

This is example project, which shows how to 'dockerize' you Phoenix application. All steps are wrapped into Makefile.

Requirements

• Docker (>=1.9.0)

How it works?

First it creates "builder" image. It contains all dependencies that are required to compile application, basicly just Erlang and Elixir. Also this image has compile script (from docker/compile.sh). This script creates release with our Phoenix app. As a result we get docker/web.tar.gz, which is release with our application, ready to deploy.

The next step is creating image with our application. We have to provide release, unpack it and prepare for starting. After that our image is ready! We can run it with: make docker_start or docker run -ti --rm --name web -p 80:80 web:latest

Now you can visit localhost:80 from your browser.

Diagram:

How to use:

All steps are wrapped into Makefile. To test it:

• make builder - this task builds Docker image with all necessery compile dependencies. docker/compile.sh is included as default CMD.
• make docker_release - this start container from our previously built image. It assumes that you provide application source from current directory. It is copied to /work/$APP_src and then it runs our compile.sh script
• make docker_image - this produces final image with our application. Release tarball should be placed in docker/$APP.tar.gz After this step we have our image ready!
• make docker_start - This simply uses our image to deploy application from Docker image!

TODO:

• describe migration and prepare script for it
• add some kind of supervisord
• ?