Functions

Overview

The Functions builder is used to create Azure Functions accounts. It abstracts the App Host and Service Plan into the same component, and will also create and configure a linked App Insights resource. In addition, it will automatically create a backing storage account required by the functions runtime.

• Web Site (Microsoft.Web/sites)
• Web Host (Microsoft.Web/serverfarms)
• Application Insights (Microsoft.Insights/components)
• Storage Accounts (Microsoft.Storage/storageAccounts)

Builder Keywords

Post-deployment Builder Keywords

The Functions builder contains special commands that are executed after the ARM deployment is completed.

Key Vault integration

The Function builder comes with special integration into KeyVault. By activating KeyVault integration, the function builder can automatically link to, or even create, a full KeyVault instance. All Secret or ARM Expression-based Settings (e.g. a setting that links to the Key of a Storage Account) will automatically be redirected to KeyVault. The value will be stored in KeyVault and the system identity will be activated and provided into the KeyVault with GET permissions. Lastly, Function app settings will remain in place, using the Azure Functions built-in KeyVault redirection capabilities.

The following keywords exist on the function:

Configuration Members

Example

open Farmer
open Farmer.Builders

let myFunctions = functions {
    name "myWebApp"
    service_plan_name "myServicePlan"
    setting "myKey" "aValue"
    app_insights_off
}

Example of a Premium Functions app

let servicePlan = servicePlan {
    name "myServicePlan"
    sku WebApp.Sku.EP1 // Elastic Premium 1
    max_elastic_workers 25
}

let functionsApp = functions {
    name "myFunctionsApp"
    link_to_service_plan servicePlan
}

let deployment = arm {
    add_resources [ servicePlan; functionsApp ]
}