boma/terraform/modules/hetzner_vm/main.tf

# cloud-init: create the unprivileged `ansible` user with ubongo's key + sudo.
# (Mirrors the proxmox_vm module's user_account; Hetzner has no structured field.)
locals {
  # Indentation matches the closing EOT (2 spaces) so `<<-` strips to column 0 —
  # cloud-config requires `#cloud-config` as the first line with no leading space.
  user_data = <<-EOT
  #cloud-config
  users:
    - name: ansible
      groups: [sudo]
      sudo: "ALL=(ALL) NOPASSWD:ALL"
      shell: /bin/bash
      ssh_authorized_keys:
        - ${var.ansible_ssh_pubkey}
  package_update: true
  packages:
    - python3
  EOT
}

resource "hcloud_ssh_key" "ansible" {
  name       = "${var.name}-ansible"
  public_key = var.ansible_ssh_pubkey
}

resource "hcloud_firewall" "this" {
  name = "${var.name}-fw"

  # SSH from the control node only.
  rule {
    direction  = "in"
    protocol   = "tcp"
    port       = "22"
    source_ips = var.ssh_admin_cidrs
  }

  # Public web (Caddy 80/443) + NetBird STUN/TURN (3478/udp) — only when public_web
  # (ADR-024, M4). Host nftables stays catalog-driven (ADR-020).
  dynamic "rule" {
    for_each = var.public_web ? ["80", "443"] : []
    content {
      direction  = "in"
      protocol   = "tcp"
      port       = rule.value
      source_ips = ["0.0.0.0/0", "::/0"]
    }
  }

  dynamic "rule" {
    for_each = var.public_web ? ["3478"] : []
    content {
      direction  = "in"
      protocol   = "udp"
      port       = rule.value
      source_ips = ["0.0.0.0/0", "::/0"]
    }
  }
}

resource "hcloud_server" "this" {
  name         = var.name
  server_type  = var.server_type
  location     = var.location
  image        = var.image
  ssh_keys     = [hcloud_ssh_key.ansible.id]
  user_data    = local.user_data
  firewall_ids = [hcloud_firewall.this.id]
  labels       = var.labels

  public_net {
    ipv4_enabled = true
    ipv6_enabled = true
  }
}