terraform-module-vms-hetzner/volumes.tf

locals {
  volumes = { for item in flatten([
    for hostname, host in var.vms: [
      for volumename, volume in lookup(host, "volumes", {}): {
        hostname = hostname
        volumename = volumename
        volume = volume
        host = host
      }
    ]
  ]): "${item.hostname}--${item.volumename}"  => merge(item.volume,{hostname=item.hostname}) }
}

resource "hcloud_volume" "volumes" {
  name = each.key

  location = var.default_location
  size     = each.value.size

  for_each = local.volumes
}

resource "hcloud_volume_attachment" "volume_attachments" {
  volume_id = hcloud_volume.volumes[each.key].id
  server_id = hcloud_server.vms[each.value.hostname].id
  #automount = true
  for_each = local.volumes
}