Unable to remove public IP from existing instance

[ppawlowski]

Is there an existing issue for this?

• I have searched the existing issues

Greenfield/Brownfield provisioning

brownfield

Terraform Version

1.3.10

Module Version

5.2.0

AzureRM Provider Version

v3.83.0

Affected Resource(s)/Data Source(s)

azurerm_network_interface

Terraform Configuration Files

data "azurerm_resource_group" "myrg" {
  name = "my-rg"
}

module "myvnet" {
  source  = "Azure/vnet/azurerm"
  version = "2.5.0"

  vnet_name           = "my-vnet"
  resource_group_name = data.azurerm_resource_group.myrg.name
  address_space       = [
    "172.23.0.0/28",
    "192.168.104.104/29",
    "192.168.105.8/29"]
  subnet_prefixes     = [
    "172.23.0.0/28",
    "192.168.104.104/29",
    "192.168.105.8/29"]
  subnet_names        = [
    "GatewaySubnet",
    "subnet1",
    "subnet2"]

  depends_on = [data.azurerm_resource_group.myrg]
}

module "myvm" {
  source  = "Azure/compute/azurerm"
  version = "5.2.0"

  resource_group_name           = data.azurerm_resource_group.myrg.name
  location                      = data.azurerm_resource_group.myrg.location
  vnet_subnet_id                = module.myvnet.vnet_subnets[1]
  nb_instances                  = 1
  nb_public_ip                  = 0
  vm_os_simple                  = "UbuntuServer"
  vm_hostname                   = "myVmHostname"
  admin_username                = "adminusername"
  enable_ssh_key                = true
  ssh_key                       = ""
  ssh_key_values                = [###EDITED###]
  remote_port                   = "22"
  storage_account_type          = "Standard_LRS"
  vm_size                       = "Standard_B1ms"
  delete_os_disk_on_termination = true
  identity_type                 = "SystemAssigned"

  depends_on = [
    data.azurerm_resource_group.myrg,
    module.myvnet
  ]
}

tfvars variables values

not used

Debug Output/Panic Output

│ Error: parsing "" as an PublicIpAddress ID: parsing Azure ID: parse "": empty url
│
│   with module.myvm.azurerm_network_interface.vm[0],
│   on .terraform/modules/myvm/main.tf line 446, in resource "azurerm_network_interface" "vm":
│  446:     public_ip_address_id = length(azurerm_public_ip.vm[*].id) > 0 ? element(concat(azurerm_public_ip.vm[*].id, tolist([
│  447:       ""
│  448:     ])), count.index) : ""
│

Expected Behaviour

Public IP address should be removed from existing VM

Actual Behaviour

Terraform fails with above described error. There is no possibility to have a VM instance without public IP address.

Steps to Reproduce

1. terraform plan
2. terraform apply

Important Factoids

No response

References

No response