This repository has the scripts used to build tsuru's base docker image. Keep reading for better understanding what that image does and how to create your own image for tsuru to use.
Tsuru will need to perform some actions in the containers created by docker.
This image have a built-in delpoyment script, which will also run the
requirements.apt file (so_requirements file). So if you want to build your own
platform base image you would have to provide this by yourself. This is one of
the matters this repository aims to solve.
In order to create a base image for a platform (let's say you wanna add support for php, for instance) you'll use tsuru's base image as your base image, this will give you the hooks tsuru will need to work properly.
This image has two implemented scripts:
- deploy
- so_dependencies
The deploy hook receives the application git read-only url. It will clone
the repository into the $CURRENT_DIR environment defined in the config file.
If this directory already exists, the script will simply run a git pull
inside $CURRENT_DIR. This script will also call the so_dependencies function,
defined in the so_dependencies file.
The so_dependencies script is for installing OS requirements, this is not
platform dependent, then it serves for any kind of application.
To add support for platforms tsuru does not have built-in support, one must create images. Simple create a container using tsuru base image and install everything your platform needs to run. When you're done, commit and push the image to docker registry. You might have to change some of the default scripts, for example, if you need to search platform specific dependencies (and you probably will), you'll have to call your custom dependencies seeker in the deploy script, which is the only one called directly by tsuru in deployment time.