Passioni › Informatica › Homelab

Infrastructure as Code per il homelab

Ansible permette di configurare e gestire decine di server da un unico punto di controllo, con playbook dichiarativi in YAML.

1. Installazione (solo sul controller)

apt install ansible -y
# Non serve installare nulla sui target (usa SSH)

2. Inventario (/etc/ansible/hosts)

[proxmox]
server3 ansible_host=192.168.1.81
pve10 ansible_host=192.168.1.90
pve-ai ansible_host=192.168.1.108

[webservers]
web01 ansible_host=192.168.1.92

[all:vars]
ansible_user=root

3. Comandi ad-hoc

# Ping tutti i server
ansible all -m ping

# Aggiornare tutti
ansible all -m apt -a "upgrade=dist update_cache=yes"

# Verificare uptime
ansible all -m command -a "uptime"

4. Playbook

# setup-webserver.yml
---
- hosts: webservers
  tasks:
    - name: Installare Apache
      apt:
        name: [apache2, php, php-mysql, libapache2-mod-php]
        state: present
        update_cache: yes

    - name: Abilitare Apache
      service:
        name: apache2
        state: started
        enabled: yes

    - name: Copiare configurazione
      copy:
        src: files/apache.conf
        dest: /etc/apache2/sites-available/000-default.conf
      notify: Restart Apache

  handlers:
    - name: Restart Apache
      service:
        name: apache2
        state: restarted

ansible-playbook setup-webserver.yml

5. Roles (organizzazione modulare)

ansible-galaxy init roles/webserver
# Struttura: tasks/, handlers/, templates/, files/, vars/

Ansible elimina la configurazione manuale ripetitiva: un playbook testato una volta funziona su 1 o 100 server identicamente.