Targeting Specific Nodes

1. Mục đích

• Chia host làm 3 nhóm
  • web_servers: 192.168.100.51 và 192.168.100.54 (CentOS)
  • db_servers: 192.168.100.52
  • file_servers: 192.168.100.53
• Playbook bao gồm
  • Update package toàn bộ host
  • web server: cài apache và php
  • db server: cài mariadb
  • file server: cài samba

2. File playbook

---

- hosts: all
  become: true
  pre_tasks:

  - name: update repo (CentOS)
    dnf:
      update_only: true
      update_cache: true
    when: ansible_distribution in ["CentOS"]

  - name: update repo (Ubuntu)
    apt:
      upgrade: dist
      update_cache: true
    when: ansible_distribution in ["Ubuntu"]
    
- hosts: web_servers
  become: true
  tasks:

  - name: install apache and php (CentOS)
    dnf:
      name:
        - httpd
        - php
      state: latest
    when: ansible_distribution in ["CentOS"]

  - name: install apache and php (Ubuntu)
    apt:
      name:
        - apache2
        - libapache2-mod-php
      state: latest
    when: ansible_distribution in ["Ubuntu"]

- hosts: db_servers
  become: true
  tasks:

  - name: install mariadb (CentOS)
    dnf:
      name:
        - mariadb-server
      state: latest
    when: ansible_distribution in ["CentOS"]

  - name: install mariadb (Ubuntu)
    apt:
      name:
        - mariadb-server
      state: latest
    when: ansible_distribution in ["Ubuntu"]

- hosts: db_servers
  become: true
  tasks:

  - name: install samba
    package:
      name:
        - samba
      state: latest