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DEVELOPMENT.md

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Development and testing

Development

You can develop this role using Vagrant virtual machine. It can be started using Vagrant directly by running vagrant up while in vagrant/ subdirectory. This machine will be provisioned with playbook molecule/default/playbook.yml, which will run this role and all required dependencies. After that, you can connect to this machine with vagrant ssh command.

You can also start this virtual machine using molecule testing framework (see below for instructions about installation and running). Just run following command:

$ molecule test --destroy never --driver-name vagrant

This command will provision the test virtual machine, run the test suite, and quit without destroying the VM. You can connect to the console using VirtualBox console.

Testing

For testing this role molecule framework is used. The tests themselves are written using testinfra package.

Installation

To install molecule:

  1. Have python installed on your system

    • installed by default on many operating systems
    • can be installed from HomeBrew on macOS by issuing brew install python@2 command

  2. Install pip - python package manager

    curl https://bootstrap.pypa.io/get-pip.py | sudo /usr/local/bin/python2

  3. Install virtualenv package using pip Install location might vary. Usually pip will be installed in a location on system path, so it should be available by just running pip. It is known that in recent versions of python installed by HomeBrew on macOS systems the binary location is a bit convoluted. For instance, it might be /usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/bin/pip. To make it easier to use, you can create a symbolic link in a directory on system path. For instance:

    sudo ln -s /usr/local/Cellar/python@2/2.7.15_1/Frameworks/Python.framework/Versions/2.7/bin/pip

  4. Install virtualenv

    virtualenv --no-site-packages ~/.venv

  5. Activate virtualenv (this step will need to be executed before running molecule in a new shell)

    source ~/.venv/bin/activate

  6. Install required packages

    pip install molecule ansible

  7. [option] for running tests in docker container, install docker from Docker website and install docker python package

    pip install docker-py

  8. [option] for running tests in a vagrant environment, install vagrant, VirtualBox, and python package for vagrant

    pip install python-vagrant

In the instructions above location of python binary may need to be adjusted.

Running

In the role main directory, activate virtualenv:

source ~/.venv/bin/activate

Then you can run the tests:

molecule test

By default, the tests are being run in a docker container. To run it in vagrant/virtualbox virtual machine, run:

molecule test --driver-name vagrant