The premise behind any-saas is more an implementation of something theoretical than it is practical to use.

In July, a site called Try RethinkDB was launched. The premise? Using http://docker.io containers, it was very simple to create a SaaS to allow people to use your software without any upfront investment. All a user had to do was click a button for their own sandboxed environment.

Using this package will allow you to have a starting point for creating your own SaaS for any Docker image of your choice.

I recently modified it (and the template shows) to be a MongoDB SaaS by default. In about 15 lines of code.

api.py is the main entrypoint. This code ensures the environment has been configured properly or exits if it hasn't. It sets up a main flask app and then starts it on port 5000 (defualt)

You could say here's where the magic happens. Using http://github.com/dotcloud/docker-py we connect to the configured DOCKER_HOST to instantiate and get some information about a new Docker container.

Right now, dynamic routing is managed by http://github.com/dotcloud/hipache - my favorite reverse proxy.

Configuration is managed by Redis, and adding the route is as simple as rpushing some values to a key.

This file makes a few assumptions:

1. You're using hipache
2. You're deploying any-saas as a container (named trymongo-website)

Other than that, modifying a few keys is all that's needed to make your own mongodb SaaS work out of box.