What is your main use case for Ansible? What have you configured or automated?

The main use case of Ansible is automation of deployment and configuration of servers and applications. For example, I configured infrastructure for a web application, where Ansible playbook automatically installed necessary packages, configured services (nginx, databases), deployed code, and applied security configurations.

A simple playbook example for installing nginx and starting the service:

- hosts: webservers
  become: yes
  tasks:
    - name: Install nginx
      apt:
        name: nginx
        state: present
        update_cache: yes

    - name: Start and enable nginx
      systemd:
        name: nginx
        state: started
        enabled: yes

This approach allows for quick scaling of infrastructure, minimizes manual configuration errors, and ensures repeatability of deployments.