Create a function app from the Azure portal

This topic shows you how to use Azure Functions to create a function app in the Azure portal. A function app is the container that hosts the execution of individual functions.

Create a function app

  1. Select the Create a resource button found on the upper left-hand corner of the Azure portal, then select Compute > Function App.

    Create a function app in the Azure portal

  2. Use the function app settings as specified in the table below the image.

    Define new function app settings

    Setting Suggested value Description
    App name Globally unique name Name that identifies your new function app. Valid characters are a-z, 0-9, and -.
    Subscription Your subscription The subscription under which this new function app is created.
    Resource Group myResourceGroup Name for the new resource group in which to create your function app.
    OS Windows The language options available depend on the OS of the function app. For example, Python requires Linux.
    Hosting plan Consumption plan Hosting plan that defines how resources are allocated to your function app. In the default Consumption Plan, resources are added dynamically as required by your functions. In this serverless hosting, you only pay for the time your functions run. When you run in an App Service plan, you must manage the scaling of your function app.
    Location West Europe Choose a region near you or near other services your functions access.
    Runtime stack Preferred language Choose a runtime that supports your favorite function programming language. Choose .NET for C# and F# functions.
    Storage Globally unique name Create a storage account used by your function app. Storage account names must be between 3 and 24 characters in length and may contain numbers and lowercase letters only. You can also use an existing account, which must meets the storage account requirements.
    Application Insights Default Creates an Application Insights resource of the same App name in the nearest supported region. By expanding this setting, you can change the New resource name or choose a different Location in an Azure geography where you want to store your data.
  3. Select Create to provision and deploy the function app.

  4. Select the Notification icon in the upper-right corner of the portal and watch for the Deployment succeeded message.

    Define new function app settings

  5. Select Go to resource to view your new function app. You can also select Pin to dashboard. Pinning makes it easier to return to this function app resource from your dashboard.

When you create a function app, supply a valid App name, which can contain only letters, numbers, and hyphens. Underscore (_) is not an allowed character.

Storage account names must be between 3 and 24 characters in length and may contain numbers and lowercase letters only. Your storage account name must be unique within Azure.

After the function app is created, you can create individual functions in one or more different languages. Create functions by using the portal, continuous deployment, or by uploading with FTP.

Service plans

Azure Functions has three different service plans: Consumption plan, Premium plan, and Dedicated (App Service) plan. You must choose your service plan when your function app is created, and it cannot subsequently be changed. For more information, see Choose an Azure Functions hosting plan.

If you are planning to run JavaScript functions on a Dedicated (App Service) plan, you should choose a plan with fewer cores. For more information, see the JavaScript reference for Functions.

Storage account requirements

When creating a function app, you must create or link to a general-purpose Azure Storage account that supports Blob, Queue, and Table storage. Internally, Functions uses Storage for operations such as managing triggers and logging function executions. Some storage accounts do not support queues and tables, such as blob-only storage accounts, Azure Premium Storage, and general-purpose storage accounts with ZRS replication. These accounts are filtered out of from the Storage Account blade when creating a function app.

Note

When using the Consumption hosting plan, your function code and binding configuration files are stored in Azure File storage in the main storage account. When you delete the main storage account, this content is deleted and cannot be recovered.

To learn more about storage account types, see Introducing the Azure Storage Services.

Next steps

While the Azure portal makes it easy to create and try out Functions, we recommend local development. After creating a function app in the portal, you still need to add a function.