Attach multiple managed disks to multiple azure VM

[Jay]

Hello,

What I am trying to achieve is the following.

I would like to have a module which creates multiple VMs with multiple managed disks.

For example:

I have 3 disks-DATA, LOG, TMP

and I have 2 VMs: VM1 and VM2.

 I am using following terraform script.

variable "data_disk_sizes" {
  description = "Storage data disk size size"
  default     = ["DATA","LOG","TMPDB"]
}
variable "data_disk_names" {
  description = "Storage data disk names"
  default     = ["100", "100","20"]
}


resource "azurerm_virtual_machine" "vm-windows" {
    count = 2
    .
    .
    .
}

resource "azurerm_managed_disk" "vm" {
  name                 = "${var.data_disk_names[count.index % length(var.data_disk_names)]}${count.index}"
  location             = "${azurerm_resource_group.vm.location}"
  resource_group_name  = "${azurerm_resource_group.vm.name}"
  storage_account_type = "Standard_LRS"
  create_option        = "Empty"
  disk_size_gb         = "${var.data_disk_sizes[count.index % length(var.data_disk_sizes)]}"
  count                = "${var.data_disk == "true" ? var.nb_instances *  length(var.data_disk_names) : 0}"
}

I have tried this but no luck.

resource "azurerm_virtual_machine_data_disk_attachment" "vm" {
  count              = "${var.data_disk == "true" ?   length(azurerm_virtual_machine.vm-windows) *  length(azurerm_managed_disk.vm) : 0}"
  managed_disk_id    = "${azurerm_managed_disk.vm[count.index % length(azurerm_managed_disk.vm)].id}"
  virtual_machine_id = "${azurerm_virtual_machine.vm-windows[count.index %  length(azurerm_virtual_machine.vm-windows)].id}"
  lun                = "${count.index  + 10}"
  caching            = "ReadWrite"
  depends_on = ["azurerm_virtual_machine.vm-windows"]

}