Feature request-

[sharmilamusunuru]

Is there an existing issue for this?

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Description

One of my customer is looking forward to spin VMSS using specialized image in compute gallery, when he's running below template, he's getting per [Parameter 'osProfile' is not allowed error ] I've noticed this is an open issue as we can't attach exist os disk to VMSS and it throws this error for both windows, linux machines. Looking forward to understand whether is there any fix that can be provided.

. · Issue #3247 · hashicorp/terraform-provider-azurerm (github.com)](https://github.com/hashicorp/terraform-provider-azurerm/issues/3247)

New or Affected Resource(s

azurerm_windows_virtual_machine, azurerm_linux_virtual_machine

Potential Configuration file

virtual_machine_scale_sets = {
  task_vmss = {
    resource_group_key                   = "app_**"
    boot_diagnostics_storage_account_key = "bootdiag"
    os_type                              = "linux"
    lz_key                               = "test_dev"
    keyvault_key                         = "test_kv"
    vmss_settings                        = {

        name                            = "taskdev_vm"
        computer_name_prefix            = "lnx"
        sku                             = "Standard_D2s_v3"
        instances                       = 2
        admin_username                  = "adminuser"
        disable_password_authentication = true
        provision_vm_agent              = true
        ultra_ssd_enabled               = false # required if planning to use UltraSSD_LRS
        upgrade_mode                    = "Manual" # Automatic / Rolling / Manual
        os_disk                         = {
          caching              = "ReadWrite"
          storage_account_type = "Standard_LRS"
          disk_size_gb         = 128
        }

        identity = {
          type                  = "UserAssigned"
          managed_identity_keys = ["***"]
        }
        custom_image_id = "/subscriptions/**"
      }
    }

References

No response