Unexpected behavior when deploying to azurerm_windows_web_app to Linux service_plan

[khaake261]

Is there an existing issue for this?

• [X] I have searched the existing issues

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Terraform Version

1.5.2

AzureRM Provider Version

3.87.0

Affected Resource(s)/Data Source(s)

azurerm_windows_web_app

Terraform Configuration Files

resource "azurerm_service_plan" "example" {
  name                       = "example"
  resource_group_name        = azurerm_resource_group.example.name
  location                   = azurerm_resource_group.example.location
  os_type                    = "Linux"
  sku_name                   = "I1v2"
  app_service_environment_id = azurerm_app_service_environment.example.id
  zone_balancing_enabled     = false
}

resource "azurerm_windows_web_app" "example" {
  name                = "example"
  resource_group_name = azurerm_resource_group.example.name
  location            = azurerm_service_plan.example.location
  service_plan_id     = azurerm_service_plan.example.id

  site_config {}
}

Debug Output/Panic Output

--

Expected Behaviour

An error was expected when trying to deploy a Windows web app to a Linux service plan.

Actual Behaviour

Successful plan and apply, except a Linux web app was deployed instead of a Windows web app.

Steps to Reproduce

terraform apply

Important Factoids

No response

References

No response

[xiaxyi]

Thanks @khaake261 for raising this issue, currently, we don't validate the service plan type when attaching an app to it. May I know why did you try to attach a windows web app to a linux service plan?

[khaake261]

@xiaxyi It was deployed to a Linux service plan by accident when doing some unrelated testing, but I thought the resulting behavior was unexpected. Is there a reason for not having validation on the service plan type when attaching an app?