Ansible Core Concepts

This page covers the few Ansible ideas you should understand before writing playbooks.

Main Concepts

1. Inventory The hosts and groups Ansible manages.
2. Playbooks YAML files that describe the automation workflow.
3. Modules Built-in actions for tasks such as installing packages, copying files, and managing services.
4. Roles Reusable playbook structure for larger projects.

How These Pieces Work Together

The usual flow is simple:

1. Define servers in an inventory.
2. Write a playbook with tasks.
3. Use modules inside those tasks.
4. Move repeated logic into roles as the project grows.

Practical Starting Point

If you are new to Ansible, start with:

• One inventory file
• One small playbook
• A few built-in modules such as ping, apt, copy, and service

Quick Check

ansible all -m ping -i inventory.ini
ansible-playbook -i inventory.ini playbook.yml --check