Deploy Azure WebJob using Terraform

In my previous post I wrote about creating infrastructure for Azure WebJob using Terraform. Using that solution is created empty infrastructure ready for deployment of Azure WebJob, but the deployment of Azure WebJob have to be done separately.

Terraform provides also options to deploy Azure WebJob immediately after required Azure resources are created. It is posible by combination of Terraform provisioner together with Azure CLI command az webapp deployment as demonstrated in following code snippet:

resource "null_resource" "webjob" {
  provisioner "local-exec" {
    when = create
    command = "az webapp deployment source config-zip -g ${var.resource_group_name} -n ${var.resource_group_name} --src ${var.deployment_package}"
  }
  depends_on = [ azurerm_app_service.as ]
}

Terraform provisioner is executed locally at creation of resource and is placed in null_resource which has dependency on azurerm_app_service.as resource. Complete main.tf file which is responsible for creating Azure resources and then deployment of Azure WebJob is:

terraform {
  required_providers {
    azurerm = {
      source = "hashicorp/azurerm"
      version = ">= 2.0"
    }
  }
}

provider "azurerm" {
  features {}
}

variable "resource_group_name" {
  type = string
  description = "Resource group name"
  default = "WinServiceToAzureTest"
}

variable "location_name" {
  type = string
  description = "Resource location"
  default = "westeurope"
}

variable "deployment_package" {
  type = string
  description = "Deployment package"
  default = "Publish.zip"
}

resource "azurerm_resource_group" "rg" {
  name = var.resource_group_name
  location = var.location_name
}

resource "azurerm_app_service_plan" "asp" {
  name = var.resource_group_name
  location = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
  sku {
    tier = "Basic"
    size = "B1"
  }
}

resource "azurerm_app_service" "as" {
  name = var.resource_group_name
  location = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
  app_service_plan_id = azurerm_app_service_plan.asp.id
  client_affinity_enabled = false
  site_config {
    use_32_bit_worker_process = false
    always_on = true
  }
  app_settings = {
    "APPINSIGHTS_INSTRUMENTATIONKEY" = azurerm_application_insights.ai.instrumentation_key
  }
  connection_string {
    name = "AzureWebJobsDashboard"
    type = "Custom"
    value = "DefaultEndpointsProtocol=https;AccountName=${lower(var.resource_group_name)};AccountKey=${azurerm_storage_account.sa.primary_access_key};EndpointSuffix=core.windows.net"
  }
  connection_string {
    name = "AzureWebJobsStorage"
    type = "Custom"
    value = "DefaultEndpointsProtocol=https;AccountName=${lower(var.resource_group_name)};AccountKey=${azurerm_storage_account.sa.primary_access_key};EndpointSuffix=core.windows.net"
  }  
}

resource "azurerm_storage_account" "sa" {
  name = lower(var.resource_group_name)
  location = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name  
  account_tier = "Standard"
  account_replication_type = "LRS"
}

resource "azurerm_application_insights" "ai" {
  name = var.resource_group_name
  location = azurerm_resource_group.rg.location
  resource_group_name = azurerm_resource_group.rg.name
  application_type = "web"  
}

resource "null_resource" "webjob" {
  provisioner "local-exec" {
    when = create
    command = "az webapp deployment source config-zip -g ${var.resource_group_name} -n ${var.resource_group_name} --src ${var.deployment_package}"
  }
  depends_on = [ azurerm_app_service.as ]
}

If you are interested in Azure WebJobs and how to use them to migrage Windows service to Azure, take my Udemy course Migrate Windows service to Azure.