Archive for October, 2019
Connect Application Insights to your Azure Functions App in Terraform
Posted by sseely in Uncategorized on October 17, 2019
This goes into the “notes for Scott” category, where I post things to my blog for me. I hope this is somewhat useful for you too!
I’m in the process of writing Terraform automation for an Azure Functions application I’ve built. When the deployment completed and I went to the Azure Functions application in the Azure portal (https://portal.azure.com), I got a message stating that Application Insights wasn’t connected to the Functions App:
Application Insights is not configured. Configure Application Insights to capture function logs.
The fix isn’t well documented, yet. After deploying a functions app via the portal, I found the link and it’s pretty simple: Azure Functions uses an app setting named APPINSIGHTS_INSTRUMENTATIONKEY. Just add that with the right value and things work.
To put it all together, you will deploy an app service plan, Application Insights, and an Azure Function App:
resource "azurerm_app_service_plan" "app_service_plan" {
name = "${var.base_name}appserv"
location = "${azurerm_resource_group.rg.location}"
resource_group_name = "${azurerm_resource_group.rg.name}"
kind = "Linux"
reserved = true
sku {
tier = "Basic"
size = "B1"
}
}
resource "azurerm_application_insights" "ai" {
name = "${var.base_name}ai"
location = "${azurerm_resource_group.rg.location}"
resource_group_name = "${azurerm_resource_group.rg.name}"
application_type = "web"
}
resource "azurerm_function_app" "apis" {
name = "${var.base_name}func"
location = "${azurerm_resource_group.rg.location}"
resource_group_name = "${azurerm_resource_group.rg.name}"
app_service_plan_id = "${azurerm_app_service_plan.app_service_plan.id}"
storage_connection_string = "${azurerm_storage_account.az_backend.primary_connection_string}"
https_only = true
version = "~2"
app_settings = {
APPINSIGHTS_INSTRUMENTATIONKEY = "${azurerm_application_insights.ai.instrumentation_key}"
}
site_config {
cors {
allowed_origins = ["https://www.${var.domain_name}"]
}
}
}
Upon running this, the error message went away and Azure Functions showed I had connected everything correctly.
