Ansible Playbooks

Writing and organizing Ansible playbooks for configuration management.

Basic Playbook

• name: Configure web servers hosts: webservers become: yes

  vars: http_port: 80 app_version: "1.0.0"

  tasks:

  • name: Install nginx apt: name: nginx state: present update_cache: yes

  • name: Start nginx service: name: nginx state: started enabled: yes

  • name: Deploy application copy: src: ./app dest: /var/www/html owner: www-data mode: '0755'

Inventory

[webservers] web1.example.com web2.example.com

[databases] db1.example.com

[production:children] webservers databases

Common Modules

Package Management

• name: Install packages apt: name: - nginx - git - python3 state: present

File Operations

• name: Copy configuration template: src: nginx.conf.j2 dest: /etc/nginx/nginx.conf backup: yes notify: Restart nginx

Handlers

handlers:

• name: Restart nginx service: name: nginx state: restarted

Best Practices

Use Roles

roles/ ├── webserver/ │ ├── tasks/ │ │ └── main.yml │ ├── handlers/ │ │ └── main.yml │ └── templates/ │ └── nginx.conf.j2

Idempotency

• name: Ensure directory exists file: path: /opt/app state: directory mode: '0755'