azurerm_linux_function_app - WEBSITE_CONTENTSHARE setting does not update after apply

[sitengyu-hc]

Is there an existing issue for this?

• I have searched the existing issues

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Terraform Version

1.9.8

AzureRM Provider Version

4.14.0

Affected Resource(s)/Data Source(s)

azurerm_linux_function_app

Terraform Configuration Files

provider "azurerm" {
  features {}
  subscription_id = "xxxxx"
}


resource "azurerm_resource_group" "test" {
  name     = "test165138"
  location = "West US 2"
}

resource "azurerm_storage_account" "test" {
  name                     = "test165138"
  resource_group_name      = azurerm_resource_group.test.name
  location                 = azurerm_resource_group.test.location
  account_tier             = "Standard"
  account_replication_type = "LRS"
}

resource "azurerm_service_plan" "test" {
  name                = "test165138"
  location            = azurerm_resource_group.test.location
  resource_group_name = azurerm_resource_group.test.name
  os_type             = "Linux"
  sku_name            = "EP1"
}

resource "azurerm_linux_function_app" "test" {
  name                = "test165138"
  location            = azurerm_resource_group.test.location
  resource_group_name = azurerm_resource_group.test.name
  service_plan_id     = azurerm_service_plan.test.id

  storage_account_name       = azurerm_storage_account.test.name
  storage_account_access_key = azurerm_storage_account.test.primary_access_key

  builtin_logging_enabled = true

  app_settings = {
    foo                  = "bar"
    secret               = "sauce"
    WEBSITE_CONTENTSHARE = "custom-asdf"
  }

  site_config {}
}

Debug Output/Panic Output

# azurerm_linux_function_app.test will be updated in-place
  ~ resource "azurerm_linux_function_app" "test" {
      ~ app_settings                                   = {
          ~ "WEBSITE_CONTENTSHARE" = "custom-asdf" -> "custom-hjkl"

Expected Behaviour

The planned change to WEBSITE_CONTENTSHARE is actually made on this resource.

Actual Behaviour

Apply succeeds, but value is not updated in portal.

Steps to Reproduce

Apply to create the resource with a custom WEBSITE_CONTENTSHARE

Change WEBSITE_CONTENTSHARE to something else, plan will show e.g.:

Terraform will perform the following actions:

azurerm_linux_function_app.test will be updated in-place

~ resource "azurerm_linux_function_app" "test" {
~ app_settings = {
~ "WEBSITE_CONTENTSHARE" = "custom-asdf" -> "custom-hjkl"

Apply succeeds, but value is not updated in portal. Subsequent plan will show the same planned change above.

Important Factoids

No response

References

Found this is a tested value in the provider:

terraform-provider-azurerm/internal/services/appservice/linux_function_app_resource_test.go

Line 2359 in 4a6054e

WEBSITE_CONTENTSHARE = "test-acc-custom-content-share"

[xiaxyi]

Thanks @sitengyu-hc for raising this issue, let me test the feature and update once I have any thoughts