Your First Ansible Playbook: Automate Server Setup in 15 Minutes

The Problem Ansible Solves

You have 10 new Ubuntu servers. Each needs nginx, a deploy user, firewall rules, and app config. Manually: 2 hours. With Ansible: 3 minutes, identically on all 10.

setup-webserver.yml

## Inventory File

Run It

## Key Concepts
**Idempotency:** Run 10 times, same result as once. nginx being 'present' is checked, not installed blindly.
**Handlers:** Only run when triggered by `notify`. Nginx only reloads if the config file actually changed.
**Loops:** `loop` runs the same task with different values — cleaner than copy-pasting 4 identical tasks.
Next: Ansible Intermediate covers roles, Vault (encrypted secrets), and dynamic cloud inventory.