What is the difference between roles and playbooks in Ansible, and how do they interact when automating tasks?

In Ansible:

• Playbooks are YAML files that describe sequences of tasks to be executed on remote hosts. A playbook defines what needs to be done and in what order.

• Roles are a way to structure and reuse sets of tasks, files, templates, and variables. A role is a kind of module that can be included in playbooks to organize code.

Interaction:

A playbook calls roles to perform specific tasks. Roles help break down a playbook into logical parts, improving readability and maintainability of the code. For example, a role might be responsible for installing and configuring a web server, while the playbook manages the deployment of the entire application, calling multiple roles in sequence.