DevOps: Puppet, Docker, and Kubernetes

Testing with Docker

While doing the development or QA, it will be helpful if we can check our code against different environments. For example, we may wish to check our Python code between different versions of Python or on different distributions such as Fedora, Ubuntu, CentOS, and so on. For this recipe, we will pick up sample code from Flask's GitHub repository, which is a microframework for Python (http://flask.pocoo.org/). I chose this to keep things simple, and it is easier to use for other recipes as well.

For this recipe, we will create images to have one container with Python 2.7 and other with Python 3.3. We'll then use a sample Python test code to run against each container.

Getting ready

• As we are going to use example code from Flask's ...