azurerm_linux_function_app for node runtimes version 4 don't load in app settings and env variables.

[aidando73]

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Terraform Version

1.2.8

AzureRM Provider Version

3.21.1

Affected Resource(s)/Data Source(s)

azurerm_linux_function_app

Terraform Configuration Files

terraform {
  required_providers {
    azurerm = {
      source  = "hashicorp/azurerm"
      version = ">= 3.21.1"
    }
  }
	required_version = ">= 1.2.8"
}


provider "azurerm" {
  features {
    resource_group {
      prevent_deletion_if_contains_resources = false
    }
  }
}

resource "azurerm_resource_group" "test_resource_group" {
  name     = "test-resource-group"
  location = "australia east"
}

resource "azurerm_service_plan" "test_linux_app" {
	name = "ASP-test-linux-app"
	resource_group_name = azurerm_resource_group.test_resource_group.name
  location            = azurerm_resource_group.test_resource_group.location
  os_type             = "Linux"
  sku_name            = "Y1"
}

resource "azurerm_storage_account" "test_linux_app" {
  name                     = "testlinuxapp234"
  resource_group_name      = azurerm_resource_group.test_resource_group.name
  location                 = azurerm_resource_group.test_resource_group.location
  account_tier             = "Standard"
  account_replication_type = "LRS"
}

resource "azurerm_linux_function_app" "test_linux_app" {
  name                = "test-linux-app-2348234"
  resource_group_name = azurerm_resource_group.test_resource_group.name
  location            = azurerm_resource_group.test_resource_group.location

  service_plan_id            = azurerm_service_plan.test_linux_app.id
  storage_account_name       = azurerm_storage_account.test_linux_app.name
  storage_account_access_key = azurerm_storage_account.test_linux_app.primary_access_key

  app_settings = {
    # // These environment variables have to be set, otherwise app settings do not get loaded as environment variables
    # // https://github.com/Azure/Azure-Functions/issues/1696
    # "FUNCTIONS_WORKER_RUNTIME" = "node"
  }
	# functions_extension_version = "~3"

	site_config {
		    cors {
      allowed_origins = ["*"]
    }
  }
}

Debug Output/Panic Output

N/A

Expected Behaviour

Suppose we create a http triggered js function like:

module.exports = async function (context, req) {
    context.res = {
        // status: 200, /* Defaults to 200 */
        body: process.env['AzureWebJobsStorage']
    };
}

with function.json

{
  "bindings": [
    {
      "authLevel": "function",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": [
        "get",
        "post"
      ]
    },
    {
      "type": "http",
      "direction": "out",
      "name": "res"
    }
  ]
}

When I trigger this function, I expect to receive a response like:

DefaultEndpointsProtocol=https;AccountName=testlinuxapp234;AccountKey=ekBAuA5ATKvJI/y1X2XVqNeV2tQHXNlwGJ19PpXoEYXEr//mv4DRQEyyKs2RNSG4ZzalNKeO76js+AStFz4VtQ==;EndpointSuffix=core.windows.net

Actual Behaviour

I get an empty response (it's undefined)

Steps to Reproduce

1. terraform apply
2. func function new
   • Create a node app.
   • with a http trigger
3. Copy the following code into the trigger:

module.exports = async function (context, req) {
    context.res = {
        // status: 200, /* Defaults to 200 */
        body: process.env['AzureWebJobsStorage']
    };
}

4. func azure functionapp publish {funcAppName}
5. Trigger the http trigger.

If you uncomment # "FUNCTIONS_WORKER_RUNTIME" = "node" and # functions_extension_version = "~3" (from the terraform config), the function works as expected.

Important Factoids

No response

References

Based off this issue https://github.com/Azure/Azure-Functions/issues/1696