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# inventory.ini
[webservers]
web01 ansible_host=192.168.1.10
web02 ansible_host=192.168.1.11

[databases]
db01 ansible_host=192.168.1.20

[production:children]
webservers
databases

[webservers]
web01 ansible_host=192.168.1.10 http_port=80
web02 ansible_host=192.168.1.11 http_port=8080

[webservers:vars]
ansible_user=deploy
ansible_ssh_private_key_file=~/.ssh/deploy_key

# inventory.yml
all:
  children:
    webservers:
      hosts:
        web01:
          ansible_host: 192.168.1.10
        web02:
          ansible_host: 192.168.1.11
      vars:
        http_port: 80
    databases:
      hosts:
        db01:
          ansible_host: 192.168.1.20

---
- name: Configure web servers
  hosts: webservers
  become: true

  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
  hosts: webservers
  vars:
    app_name: myapp
    app_port: 8080

  tasks:
    - name: Create app directory
      file:
        path: "/opt/{{ app_name }}"
        state: directory

---
- name: Configure nginx
  hosts: webservers
  become: true

  tasks:
    - name: Copy nginx config
      template:
        src: nginx.conf.j2
        dest: /etc/nginx/nginx.conf
      notify: Restart nginx

  handlers:
    - name: Restart nginx
      service:
        name: nginx
        state: restarted

- name: Install on Debian
  apt:
    name: nginx
  when: ansible_os_family == "Debian"

- name: Install on RedHat
  yum:
    name: nginx
  when: ansible_os_family == "RedHat"

- name: Create users
  user:
    name: "{{ item }}"
    state: present
  loop:
    - alice
    - bob
    - charlie

- name: Create users with groups
  user:
    name: "{{ item.name }}"
    groups: "{{ item.groups }}"
  loop:
    - { name: alice, groups: admin }
    - { name: bob, groups: developers }

- name: Get uptime
  command: uptime
  register: uptime_result

- name: Show uptime
  debug:
    msg: "{{ uptime_result.stdout }}"

- name: Handle errors
  block:
    - name: Risky task
      command: /bin/false
  rescue:
    - name: Recovery task
      debug:
        msg: "Task failed, recovering"
  always:
    - name: Always runs
      debug:
        msg: "Cleanup"

- name: Create directory
  file:
    path: /opt/app
    state: directory
    owner: deploy
    group: deploy
    mode: '0755'

- name: Copy file
  copy:
    src: files/app.conf
    dest: /etc/app/app.conf
    owner: root
    mode: '0644'

- name: Deploy config
  template:
    src: templates/app.conf.j2
    dest: /etc/app/app.conf

- name: Add line to file
  lineinfile:
    path: /etc/hosts
    line: "192.168.1.10 server.local"
    state: present

- name: Create user
  user:
    name: deploy
    groups: sudo
    shell: /bin/bash
    generate_ssh_key: yes

- name: Install packages
  apt:
    name:
      - nginx
      - python3
    state: present
    update_cache: yes

- name: Install packages
  yum:
    name: nginx
    state: latest

- name: Manage service
  service:
    name: nginx
    state: started
    enabled: yes

- name: Manage systemd service
  systemd:
    name: myapp
    state: restarted
    daemon_reload: yes

- name: Clone repository
  git:
    repo: https://github.com/user/repo.git
    dest: /opt/app
    version: main

- name: Run container
  docker_container:
    name: myapp
    image: myapp:latest
    ports:
      - "8080:80"

- name: Check endpoint
  uri:
    url: http://localhost:8080/health
    status_code: 200
  register: result

- name: Print variable
  debug:
    var: my_variable

- name: Print message
  debug:
    msg: "Value is {{ my_variable }}"

roles/
  webserver/
    tasks/
      main.yml
    handlers/
      main.yml
    templates/
      nginx.conf.j2
    files/
    vars/
      main.yml
    defaults/
      main.yml
    meta/
      main.yml

---
- name: Configure servers
  hosts: webservers
  roles:
    - webserver
    - { role: database, db_name: mydb }
    - role: monitoring
      when: enable_monitoring

ansible-galaxy init myrole

ansible-galaxy install geerlingguy.nginx
ansible-galaxy install -r requirements.yml