What defines a module in Ansible?

A module in Ansible is essentially a unit of Python code designed to perform specific tasks. This task-oriented nature of modules allows users to execute operations like managing packages, services, files, or user accounts on the systems being managed. Modules are reusable, making them integral to building playbooks that automate complex configurations in a clean and efficient manner.

The modular structure of Ansible means that each module encapsulates its functionality, which can then be used within playbooks or directly from the command line, providing the flexibility and scalability essential for automation. This design modularity enhances code readability and maintenance, as well as the efficiency of executing automation tasks across different environments.

In contrast, user interfaces, configuration files, and methods for device connections serve different purposes within the Ansible ecosystem. While they play crucial roles in orchestration and connectivity, they do not embody the specific functionality that defines a module.