What steps should be followed when creating and managing a role in Ansible?

Creating and managing a role in Ansible usually involves the following steps:

1. Creating the role structure — you can use the command ansible-galaxy init <role_name>, which creates a standard directory structure (tasks, handlers, defaults, vars, files, templates, meta).

2. Defining tasks — in the tasks folder, describe the main tasks of the role in the main.yml file.

3. Handlers — in the handlers folder, describe actions triggered by events (e.g., restarting a service).

4. Variables — in the defaults and vars folders, set variables with different priorities.

5. Templates and files — place Jinja2 templates and static files in the templates and files folders, which the role can use.

6. Metadata — in meta/main.yml, specify role dependencies and other information.

7. Using the role — include the role in a playbook via the roles key.

8. Testing and debugging — run the playbook with the role and check for correct execution.

Example of including a role in a playbook:

- hosts: all
  roles:
    - my_role

Thus, roles help structure configuration, reuse code, and simplify maintenance.