Terraform - configuring function app to use existing ASE

It is something hard to get the settings rights for terraform, if you don't run it multiple times.
In this example, i had so much errors and i found out that, if you referencing an existing ASE plan, you better make sure it matches - in terms of TIER and SIZE. Otherwise your service plan is as good as no service plan

\resource "azurerm_app_service_plan" "ase-service-plan" {

name = "${var.environment}${var.service_plan_name}"

resource_group_name = "${azurerm_resource_group.azure-rg.name}"

location = "${var.location}"

kind = "FunctionApp"

app_service_environment_id = "/subscriptions/

your-subscription-id/

resourceGroups/yourResourceGroup/providers/Microsoft.Web/

hostingEnvironments/your-ASE-name"

maximum_elastic_worker_count = 1

## required - Isolated ASEV2 ## Best to match this

sku {

tier = "Isolated"

size = "I1"

capacity = 1

}

}