Terraform creating VM from managed disk image made in Packer

Question

I have created a custom VM image using Packer, and now I am trying to create a new VM based on this image using Terraform, but I am confused on how I need to set up my .TF file

Answer 1

I have added the below code in the .TF file and it's working fine. Thank you for your help!

storage_image_reference {
    id = "/subscriptions/33efe2dc-e7a0-4fb8-827d-8be939879420/resourceGroups/packerRG/providers/Microsoft.Compute/images/myPackerImage"
}

Answer 2

There is two ways to attach a managed disk to a VM.

Either you remove the azure_managed_disk ressource and you specify the image reference in the azurerm_virtual_machine ressource. The managed disk will be automatically created and attached to the VM.

resource "azurerm_virtual_machine" "PackerVm_TEST" {
name =  "${var.hostname}"
location = "northeurope"
resource_group_name   = "${azurerm_resource_group.packer.name}"
network_interface_ids = ["${azurerm_network_interface.packerNetInt_Test.id}"]
vm_size = "Standard_D2s_v3"

storage_os_disk {
    name            = "FromPackerImageOsDisk"
    managed_disk_type = "Standard_LRS"
    caching           = "ReadWrite"
    create_option     = "FromImage"
}
storage_image_reference {
    id = "/subscriptions/33efe2dc-e7a0-4fb8-827d-8be939879420/resourceGroups/packerRG/providers/Microsoft.Compute/images/myPackerImage"
}

os_profile {
    computer_name  = "PackerVmTEST"
    admin_username = "packermakeradmin1"
    admin_password = "RMKRTest123"
  }
os_profile_windows_config {
    enable_automatic_upgrades = "true"
    provision_vm_agent ="true"
}

}

Or you add the managed disk id in the azurerm_virtual_machine ressource.

resource "azurerm_managed_disk" "managedDisk" {
  name                 = "managed_disk_test1"
  location             = "northeurope"
  resource_group_name  = "${azurerm_resource_group.packer.name}"
  storage_account_type = "Standard_LRS"
  create_option        = "FromImage"
  image_reference_id   = "/subscriptions/33efe2dc-e7a0-4fb8-827d-8be939879420/resourceGroups/packerRG/providers/Microsoft.Compute/images/myPackerImage"
  disk_size_gb         = "1"
}

resource "azurerm_virtual_machine" "PackerVm_TEST" {
    name =  "${var.hostname}"
    location = "northeurope"
    resource_group_name   = "${azurerm_resource_group.packer.name}"
    network_interface_ids = ["${azurerm_network_interface.packerNetInt_Test.id}"]
    vm_size = "Standard_D2s_v3"

    storage_os_disk {
        name            = "FromPackerImageOsDisk"
        managed_disk_id = "${azurerm_managed_disk.managedDisk.id}"
        managed_disk_type = "Standard_LRS"
        caching           = "ReadWrite"
        create_option     = "Attach"
    }
    os_profile {
        computer_name  = "PackerVmTEST"
        admin_username = "packermakeradmin1"
        admin_password = "RMKRTest123"
      }
    os_profile_windows_config {
        enable_automatic_upgrades = "true"
        provision_vm_agent ="true"
    }
}

From terraform documentation

managed_disk_id - (Optional) Specifies an existing managed disk to use by id. Can only be used when create_option is Attach.