Azure Documentation

Quickstart: Create your first Azure Function

This quickstart guide will walk you through the steps to create your first Azure Function, a serverless compute service that enables you to run code on demand without explicitly provisioning or managing infrastructure.

Prerequisites

• An Azure subscription: If you don't have one, create a free account.
• Azure Functions Core Tools installed.
• Azure CLI installed.
• A code editor like Visual Studio Code (recommended).

Step 1: Create a new project

Open your terminal or command prompt and run the following command to create a new Functions project:

func init MyFunctionProject --worker-runtime node --language javascript

This command initializes a new project named MyFunctionProject using Node.js as the runtime and JavaScript as the language.

Step 2: Create a new function

Navigate into your project directory and create a new function:

cd MyFunctionProject
func new --template "HTTP trigger" --name MyHttpTrigger

This command creates a new function named MyHttpTrigger with an HTTP trigger template.

Step 3: Explore the project files

Your project structure will now look something like this:

MyFunctionProject/
├── MyHttpTrigger/
│   ├── function.json
│   └── index.js
├── host.json
├── local.settings.json
└── package.json

• MyHttpTrigger/index.js: Contains your function code.
• MyHttpTrigger/function.json: Configures your function's triggers and bindings.
• host.json: Configures global settings for the Azure Functions host.
• local.settings.json: Stores app settings and connection strings for local development.

Step 4: Run your function locally

Start the Functions host locally:

func start

You should see output indicating that your function is running and the URL it's listening on. Typically, it will be something like http://localhost:7071/api/MyHttpTrigger.

Hello, Azure. This HTTP triggered function executed successfully.

Step 5: Deploy your function

To deploy your function to Azure, you first need to create an Azure Functions app resource. You can do this using the Azure CLI:

az functionapp create --resource-group MyResourceGroup --consumption-plan-location westus --runtime node --functions-version 4 --name MyUniqueFunctionAppName --storage-account MyStorageAccountName

Replace MyResourceGroup, westus, MyUniqueFunctionAppName, and MyStorageAccountName with your own values.

Once the app is created, you can deploy your code using the Azure Functions Core Tools:

func azure functionapp publish MyUniqueFunctionAppName