Power State not reported in azurerm_virtual_machine and azurerm_virtual_machine_scale_set data sources

[ned1313]

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Terraform Version

1.9.3

AzureRM Provider Version

3.115.0

Affected Resource(s)/Data Source(s)

azurerm_virtual_machine azurerm_virtual_machine_scale_set

Terraform Configuration Files

terraform {
  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = "~> 3.0"
    }
  }
}

provider "azurerm" {
  features {}
}

data "azurerm_virtual_machine" "example" {
  name                = "check-vm"
  resource_group_name = "check-vm"
}

output "power_state" {
  value = data.azurerm_virtual_machine.example.power_state
}

data "azurerm_virtual_machine_scale_set" "flexible" {
  name                = "vmss-test"
  resource_group_name = "vmss-test"
}

data "azurerm_virtual_machine_scale_set" "uniform" {
  name                = "uniform-test"
  resource_group_name = "vmss-test"
}

output "flexible_power" {
  value = { for instance in data.azurerm_virtual_machine_scale_set.flexible.instances : instance.name => instance.power_state }
}

output "uniform_power" {
  value = { for instance in data.azurerm_virtual_machine_scale_set.uniform.instances : instance.name => instance.power_state }
}

Debug Output/Panic Output

N/A

Expected Behaviour

flexible_power = {
  "vmss-test_3b9d9442" = "running"
  "vmss-test_931fa536" = "running"
}
power_state = "running"
uniform_power = {
  "uniform-test_0" = "running"
  "uniform-test_1" = "running"
}

Actual Behaviour

flexible_power = {
  "vmss-test_3b9d9442" = ""
  "vmss-test_931fa536" = ""
}
power_state = ""
uniform_power = {
  "uniform-test_0" = ""
  "uniform-test_1" = ""
}

Steps to Reproduce

1. Provision an Azure VM, Azure VM Scale Set in Uniform mode, and VM Scale Set in Flexible mode
2. Run terraform apply with the supplied configuration and the correct resource group name and resource names
3. The output for the power_state attribute will be blank

Important Factoids

No response

References

This was previously resolved in PR #22851. Refactoring of the code to support the newer API broke it again.

[ned1313]

There are actually two separate problems.

azurerm_virtual_machine data source

This data source is using the resp, err := client.Get(ctx, id, virtualmachines.DefaultGetOperationOptions()) statement here. InstanceView is required to get the power state of the VM and the DefaultGetOperationOptions() doesn't include the InstanceView in the Expand field of the struct.

azurerm_virtual_machine_scale_set data source

This one is trickier b/c there are two orchestration models that require different API endpoints to inspect the properties of the underlying VMs. Uniform orchestration uses the VMSS API and Flexible uses the VM API. For Uniform, you can include the InstanceView argument in the ListComplete call. For Flexible, you need to add the InstanceView argument to individual calls to the Azure VM client Get function.

[github-actions]

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