N8N/terraform/modules/proxmox_ubuntu_cloudinit_clone/main.tf

locals {
  selected_instance = one([
    for cfg in var.instance_configs :
    cfg if cfg.crispy_name == var.node_name
  ])
}

resource "proxmox_virtual_environment_file" "cloud_config" {
  content_type = "snippets"
  datastore_id = "local"
  node_name    = "pop"

  source_raw {
    file_name = "vm.cloud-config.yaml" # The name of the snippet file
    data      = <<-EOF
    #cloud-config
    hostname: ${var.vm_name}

    package_update: true
    package_upgrade: true

    system_info:
      default_user:
        groups: [ docker ]

    users:
      - default
      - name: cloud
        groups: 
          - sudo
          - docker
        shell: /bin/bash
        ssh-authorized-keys:
          - "${var.vm_user_sshkey}" # Inject user's SSH key
        sudo: ALL=(ALL) NOPASSWD:ALL

    packages:
      - qemu-guest-agent   
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg
      - lsb-release
      - unattended-upgrades 

    runcmd:
      - systemctl enable qemu-guest-agent 
      - mkdir -p /etc/apt/keyrings
      - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
      - echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | tee /etc/apt/sources.list.d/docker.list > /dev/null
      - apt-get update
      - apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
      - systemctl enable docker
      - systemctl start docker
      - reboot                     
    EOF
  }
}

resource "proxmox_virtual_environment_vm" "ubuntu_22_minimal_template" {
  name      = var.vm_name           # VM name
  node_name = var.node_name         # Proxmox node to deploy the VM
  tags      = var.vm_tags           # Optional VM tags for categorization

  agent {
    enabled = true                  # Enable the QEMU guest agent
  }

  stop_on_destroy = true            # Ensure VM is stopped gracefully when destroyed


  clone {
    vm_id     = local.selected_instance.vmid    # ID of the source template
    node_name = local.selected_instance.crispy_name # Node of the source template
  }

  bios    = var.vm_bios             # BIOS type (e.g., seabios or ovmf)
  machine = var.vm_machine          # Machine type (e.g., q35)

  cpu {
    cores = var.vm_cpu              # Number of CPU cores
    type  = "host"                  # Use host CPU type for best compatibility/performance
  }

  memory {
    dedicated = var.vm_ram          # RAM in MB
  }

  disk {
    datastore_id = var.node_datastore # Datastore to hold the disk
    interface    = "scsi0"             # Primary disk interface
    size         = var.vm_size      
  }


  initialization {
    user_data_file_id = proxmox_virtual_environment_file.cloud_config.id # Link the cloud-init file
    datastore_id      = var.node_datastore
    interface         = "scsi1"             # Separate interface for cloud-init
    ip_config {
      ipv4 {
        address = "dhcp"            # Get IP via DHCP
      }
    }
  }

  network_device {
    bridge  = var.bridge               # Use the default bridge 
  }

  lifecycle {
    ignore_changes = [              # Ignore initialization section after first depoloyment for idempotency
      initialization
    ]
  }
}