Add Alpine and systemd cloud-init templates

The user-data.yml.tftpl file was replaced with OS-specific templates to
support
different init systems. The new templates are
user-data-systemd.yml.tftpl and
user-data-alpine.yml.tftpl, selected based on the VM's OS type.

cloud-init/user-data-alpine.yml.tftpl

@@ -0,0 +1,52 @@
+#cloud-config
+
+# 1. Hostname configuration
+hostname: ${hostname}
+fqdn: ${hostname}
+preserve_hostname: false
+
+# 2. User creation
+# On Alpine, the privilege escalation group is "wheel" (not "sudo").
+# Keep the default shell (ash/busybox) to stay lightweight.
+users:
+  - name: ${username}
+    sudo: ALL=(ALL) NOPASSWD:ALL
+    groups: wheel
+    ssh_authorized_keys:
+      - ${ssh_key}
+
+# 3. apk repositories configuration
+# Pin the two repositories used on this homelab: edge/main + edge/community.
+# Written BEFORE package_update/package_upgrade so apk uses this config immediately.
+write_files:
+  - path: /etc/apk/repositories
+    owner: root:root
+    permissions: '0644'
+    content: |
+      http://dl-cdn.alpinelinux.org/alpine/edge/main
+      http://dl-cdn.alpinelinux.org/alpine/edge/community
+
+# 4. System update (apk)
+package_update: true
+package_upgrade: true
+
+# 5. Package installation
+# - qemu-guest-agent: main repo (required so Proxmox/Terraform can read the VM IP)
+# - tailscale: community repo
+packages:
+  - qemu-guest-agent
+  - curl
+  - sudo
+  - tailscale
+
+# 6. Services & configuration (OpenRC, not systemd)
+# Intentional order: qemu-guest-agent first to unblock Terraform as soon as possible.
+runcmd:
+  # Enable and start qemu-guest-agent via OpenRC
+  - [ rc-update, add, qemu-guest-agent, default ]
+  - [ rc-service, qemu-guest-agent, start ]
+  # Enable and start Tailscale via OpenRC
+  - [ rc-update, add, tailscale, default ]
+  - [ rc-service, tailscale, start ]
+  # Register the node with the tailnet
+  - [ tailscale, up, --authkey=${tailscale_auth_key}, --hostname=${vm_name} ]

cloud-init/user-data-systemd.yml.tftpl

@@ -1,11 +1,11 @@
 #cloud-config
 
-# 1. Configuration du nom d'hôte de la machine
+# 1. Hostname configuration
 hostname: ${hostname}
 fqdn: ${hostname}
 preserve_hostname: false
 
-# 2. Création de l'utilisateur
+# 2. User creation
 users:
   - name: ${username}
     sudo: ALL=(ALL) NOPASSWD:ALL
@@ -14,16 +14,16 @@ users:
     ssh_authorized_keys:
       - ${ssh_key}
 
-# 3. Mise à jour du système
+# 3. System update
 package_update: true
 package_upgrade: true
 
-# 4. Installation des paquets
+# 4. Package installation
 packages:
   - qemu-guest-agent
   - curl
 
-# 5. Installation et configuration de Tailscale
+# 5. Tailscale installation and configuration
 runcmd:
   # Enable and start qemu-guest-agent (systemd)
   - [ systemctl, enable, qemu-guest-agent, --now ]

terraform/prod/02-cloud-init.tf

@@ -1,8 +1,18 @@
-# Fichier: terraform/prod/02-cloud-init.tf
+# File: terraform/prod/02-cloud-init.tf
 
 locals {
-  # Utilise le contenu direct si fourni (CI), sinon lit depuis le fichier (local)
+  # Use direct content if provided (CI), otherwise read from file (local).
   ssh_public_key = var.admin_ssh_public_key != "" ? var.admin_ssh_public_key : file(var.admin_ssh_public_key_path)
+
+  # OS -> cloud-init template family mapping.
+  # Selects the correct user-data based on init system / package manager.
+  os_template_family = {
+    ubuntu   = "systemd"
+    debian   = "systemd"
+    rocky    = "systemd"
+    ipfabric = "systemd"
+    alpine   = "alpine"
+  }
 }
 
 resource "proxmox_virtual_environment_file" "cloud_config" {
@@ -13,18 +23,21 @@ resource "proxmox_virtual_environment_file" "cloud_config" {
   content_type = "snippets"
 
   source_raw {
-    data = templatefile("${path.module}/../../cloud-init/user-data.yml.tftpl", {
+    data = templatefile(
-      # Variables pour définir les informations de l'utilisateur
+      "${path.module}/../../cloud-init/user-data-${local.os_template_family[each.value.os]}.yml.tftpl",
+      {
+        # User information
         username = lookup(each.value, "username", var.default_vm_user)
         ssh_key  = local.ssh_public_key
 
-      # Variables pour définir les informations de la VM
+        # VM information
         hostname = "${each.key}.${var.domain_suffix}"
 
-      # Nouvelles variables pour Tailscale
+        # Tailscale variables
-      vm_name            = each.key # Le nom de la VM (ex: "web-01")
+        vm_name            = each.key
         tailscale_auth_key = var.tailscale_auth_key
-    })
+      }
+    )
 
     file_name = "${each.key}-cloud-init.yml"
   }