Changing the azurerm_function_app storage_connection_string causes a recreate when it shouldn't

[kraihn]

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Terraform (and AzureRM Provider) Version

Terraform v0.12.19

• provider.azurerm v1.41.0

Affected Resource(s)

• azurerm_function_app

Terraform Configuration Files

resource "azurerm_resource_group" "example" {
  location = "eastus"
  name     = "function-stg-test"
}

resource "azurerm_storage_account" "example" {
  account_replication_type = "LRS"
  account_tier             = "Standard"
  location                 = azurerm_resource_group.example.location
  name                     = "funcstgtest92783"
  resource_group_name      = azurerm_resource_group.example.name
}

resource "azurerm_app_service_plan" "example" {
  location            = azurerm_resource_group.example.location
  name                = "function-stg-test-asp-23232"
  resource_group_name = azurerm_resource_group.example.name
  kind                = "functionapp"

  sku {
    tier = "Dynamic"
    size = "Y1"
  }
}

resource "azurerm_function_app" "example" {
  app_service_plan_id       = azurerm_app_service_plan.example.id
  location                  = azurerm_app_service_plan.example.location
  name                      = "function-stg-test928732"
  resource_group_name       = azurerm_app_service_plan.example.resource_group_name
  storage_connection_string = azurerm_storage_account.example.primary_blob_connection_string
//    storage_connection_string = azurerm_storage_account.example.secondary_blob_connection_string
}

Debug Output

Panic Output

Expected Behavior

I expect the storage_connection_string to change without disrupting the existing Function App.

Actual Behavior

The Function App is marked and run as a recreate when only the storage_connection_string has changed. There isn't a comment in the plan that states the storage_connection_string is the cause of the recreate either.

Steps to Reproduce

1. terraform apply
2. Change the connection string being used from primary to secondary.
3. terraform apply

Important Factoids

Testing in normal Azure, East US

References

[ghost]

This has been released in version 2.7.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 2.7.0"
}
# ... other configuration ...

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 [email protected]. Thanks!