How We Test Our Ansible Roles with Molecule

In this blog post, the author discusses Zapier's transition to using Molecule for testing Ansible roles, highlighting how it integrates with Docker, Vagrant, and OpenStack to create a virtualized testing environment. The post details the process of setting up a testing environment for Ansible roles using Molecule, starting with a simple project to install and configure Consul. It emphasizes the importance of automated testing and continuous integration to prevent code rot, advocating for the Test-Driven Development (TDD) approach of "red, green, refactor." The author also addresses challenges like setting up systemd services in Docker and testing across multiple platforms, demonstrating how Molecule facilitates these tasks. Ultimately, the post stresses the benefits of using Molecule for maintaining Ansible roles, including its potential for integration into CI pipelines to safeguard against regressions and ensure role stability over time.