azurerm_virtual_machine-0.12.tf

resource "azurerm_virtual_machine" "main" {
  name = "myvm0"

  ...Some fields omitted...

  dynamic "storage_data_disk" {
    for_each = var.data_disks

    content {
      name              = "datadisk${storage_data_disk.value.lun}"
      lun               = storage_data_disk.value.lun
      disk_size_gb      = storage_data_disk.value.size
      create_option     = "Empty"
      managed_disk_type = "Standard_LRS"
    }
  }
}