Ansible Basics

Overview

Ansible automates configuration management, provisioning, and operational tasks using YAML playbooks and agentless SSH connections.

Core Concepts

• Inventory defines managed hosts
• Playbooks define desired tasks
• Roles organize reusable automation
• Idempotent modules keep repeatable behavior

flowchart LR
    A[Control Node] --> B[SSH]
    B --> C[Managed Hosts]

Practical Example

- hosts: web
  become: true
  tasks:
    - name: Install Nginx
      apt:
        name: nginx
        state: present

Production Example

Operations teams often use Ansible roles to standardize OS hardening, patching, and baseline monitoring across environments.

Common Pitfalls

• Large playbooks without role separation
• Non-idempotent shell commands for mutable operations
• Missing inventory segmentation by environment

Key Takeaways

• Ansible is effective for configuration and operations automation.
• Idempotency and role design improve reliability.
• Inventory discipline reduces deployment mistakes.