How do you deploy an Azure Function App using Terraform that’s hosted on Linux?

[Chris Pietschmann]

First you need to deploy a Linux-based App Service Plan into Azure. This can be done as follows:

# Create Azure App Service Plan using Consumption pricing
resource azurerm_app_service_plan "primary" {
  name                = local.app_service_plan_name
  location            = azurerm_resource_group.primary.location
  resource_group_name = azurerm_resource_group.primary.name
  kind                = "Linux"
  reserved            = true

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

Once the Linux-based App Service Plan is deployed, you can then deploy a Linux-based Azure Function App as follows that is hosted using the Linux-based App Service Plan:

# Create an Azure Function App on Linux
resource azurerm_function_app "primary" {
  name                       = local.function_app_name
  resource_group_name        = azurerm_resource_group.primary.name
  location                   = azurerm_resource_group.primary.location

  app_service_plan_id        = azurerm_app_service_plan.primary.id
  
  storage_account_name       = azurerm_storage_account.primary.name
  storage_account_access_key = azurerm_storage_account.primary.primary_access_key
  
  os_type                    = "linux"
  version                    = "~3"

  site_config {
    always_on = true
  }
}

For more explanation and expanded Terraform snippets for deploying an Azure Function App on Linux, please reference this link: https://build5nines.com/terraform-deploy-azure-function-app-with-consumption-plan/