Ansible Roles and Galaxy for Scalable Automation

Why Roles?

As playbooks grow, managing hundreds of tasks becomes difficult. Roles provide reusable, modular automation structures. [docs.ansible.com]

Create a Role

ansible-galaxy role init nginx

Generated structure:

nginx/
├── defaults
├── files
├── handlers
├── meta
├── tasks
├── templates
├── vars

Main Task Example

tasks/main.yml

---
- name: Install nginx
  apt:
    name: nginx
    state: present

Using Roles

---
- hosts: webservers

  roles:
    - nginx
``

Download Community Roles

Search:

ansible-galaxy role search nginx

Install:

ansible-galaxy role install geerlingguy.nginx

Use:

roles:
  - geerlingguy.nginx

Collections

Modern Ansible packages automation content as collections containing modules, plugins, playbooks, and roles. [docs.ansible.com], [docs.ansible.com]

Install:

ansible-galaxy collection install community.general

Best Practices

• Build reusable roles.
• Store dependencies in requirements.yml.
• Use collections instead of custom code when possible.
• Follow the standard role directory structure.