azurerm_linux_virtual_machine data disk from image

[pimvandenderen]

Is there an existing issue for this?

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Terraform Version

1.36

AzureRM Provider Version

3.26.0

Affected Resource(s)/Data Source(s)

azurerm_linux_virtual_machine

Terraform Configuration Files

resource "azurerm_linux_virtual_machine" "this" {
  name                  = "linux-vm"
  location              = "EastUS"
  resource_group_name   = azurerm_resource_group.this.name
  network_interface_ids = [azurerm_network_interface.this.id]
  size               = "Standard_D4s_v5"
  disable_password_authentication = false
  admin_username = "azadmin"
  admin_password = "Micr0s0ft21!"
  computer_name  = "linux-vm"

  source_image_id = "/subscriptions/46ff3a32-ad72-40d6-ae7c-c019a0340292/resourceGroups/terraform-rg/providers/Microsoft.Compute/images/ImageVM-image-20221215104425"

  os_disk {
     caching              = "ReadWrite"
     storage_account_type = "Standard_LRS"
   }
}

Debug Output/Panic Output

│ Error: creating Linux Virtual Machine: (Name "linux-vm" / Resource Group "LinuxTest"): compute.VirtualMachinesClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code="InvalidParameter" Message="StorageProfile.dataDisks.lun does not have required value(s) for image specified in storage profile." Target="storageProfile"
│
│   on main.tf line 103, in resource "azurerm_linux_virtual_machine" "this":
│  103: resource "azurerm_linux_virtual_machine" "this" {

Expected Behaviour

azurerm_linux_virtual_machine doesn't have an option to specify the data disk when deploying a virtual machine from a managed image. Since the image has two data disks, there is no way to refer to the data disk ID.

In the ARM reference there is an option for setting the data disk create_option to be fromImage, but the validation values on the data disk attachment in Terraform don't allow fromImage as a possible option.

Actual Behaviour

Error as shown under debug output.

Steps to Reproduce

1. Create a Linux virtual machine in Azure with an OS disk and with a Data disk.
2. Capture the VM and create a managed image that includes both disks.
3. Try to create a new VM from the managed image with both disks.

Important Factoids

No response

References

One reference is here without solution: https://discuss.hashicorp.com/t/can-create-virtual-linux-machine-from-custom-image-which-has-data-disk/10457/3

[myc2h6o]

Hi @pimvandenderen thanks for opening the issue! This shall be resolved when #6117 is supported

[rcskosir]

Hi @pimvandenderen, as stated by @myc2h6o #6117 is the one to watch for movement on this issue. I am going to close this issue as a duplicate so that we can consolidate feedback on to #6117, please upvote over there if you have not already.
The "closed" will say as not planned, but that also covers duplicates.

[github-actions]

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