Create a Node.js web app in Azure
Azure App Service provides a highly scalable, self-patching web hosting service. This quickstart shows how to deploy a Node.js app to Azure App Service.
If you don't have an Azure account, sign up today for a free account with $200 in Azure credits to try out any combination of services.
You will also need to install the Azure App Service extension, which you can use to create, manage, and deploy Linux Web Apps on the Azure Platform as a Service (PaaS).
Once the extension is installed, log into your Azure account. In the Activity Bar, select on the Azure logo to show the AZURE APP SERVICE explorer. Select Sign in to Azure... and follow the instructions.
If you see the error "Cannot find subscription with name [subscription ID]", it might be because you're behind a proxy and unable to reach the Azure API. Configure
HTTPS_PROXY environment variables with your proxy information in your terminal using
export HTTPS_PROXY=https://username:password@proxy:8080 export HTTP_PROXY=http://username:password@proxy:8080
If setting the environment variables doesn't correct the issue, contact us by selecting the I ran into an issue button below.
Before you continue, ensure that you have all the prerequisites installed and configured.
In VS Code, you should see your Azure email address in the Status Bar and your subscription in the AZURE APP SERVICE explorer.
Create your Node.js application
Next, create a Node.js application that can be deployed to the Cloud. This quickstart uses an application generator to quickly scaffold out the application from a terminal.
Scaffold a new application with the Express Generator
Express is a popular framework for building and running Node.js applications. You can scaffold (create) a new Express application using the Express Generator tool. The Express Generator is shipped as an npm module and can be run directly (without installation) by using the npm command-line tool
npx express-generator myExpressApp --view pug --git
--view pug --git parameters tell the generator to use the pug template engine (formerly known as
jade) and to create a
To install all of the application's dependencies, go to the new folder and run
cd myExpressApp npm install
Run the application
Next, ensure that the application runs. From the terminal, start the application using the
npm start command to start the server.
Now, open your browser and navigate to http://localhost:3000, where you should see something like this:
Deploy to Azure
In this section, you deploy your Node.js app using VS Code and the Azure App Service extension. This quickstart uses the most basic deployment model where your app is zipped and deployed to an Azure Web App on Linux.
Deploy using Azure App Service
First, open your application folder in VS Code.
In the AZURE APP SERVICE explorer, select the blue up arrow icon to deploy your app to Azure.
You can also deploy from the Command Palette (CTRL + SHIFT + P) by typing 'deploy to web app' and running the Azure App Service: Deploy to Web App command.
Choose the directory that you currently have open,
Choose a creation option based on the operating system to which you want to deploy:
- Linux: Choose Create new Web App.
- Windows: Choose Create new Web App and select the Advanced option.
Type a globally unique name for your Web App and press ENTER. Valid characters for an app name are 'a-z', '0-9', and '-'.
If targeting Linux, select a Node.js version when prompted. An LTS version is recommended.
If targeting Windows using the Advanced option, follow the additional prompts:
- Select Create a new resource group, then enter a name for the resource group.
- Select Windows for the operating system.
- Select an existing App Service Plan or create a new one. You can select a pricing tier when creating a new plan.
- Choose Skip for now when prompted about Application Insights.
- Choose a region near you or near resources you wish to access.
After you respond to all the prompts, the notification channel shows the Azure resources that are being created for your app.
Select Yes when prompted to update your configuration to run
npm installon the target server. Your app is then deployed.
When the deployment starts, you're prompted to update your workspace so that later deployments will automatically target the same App Service Web App. Choose Yes to ensure your changes are deployed to the correct app.
Be sure that your application is listening on the port provided by the PORT environment variable:
Browse the app in Azure
Once the deployment completes, select Browse Website in the prompt to view your freshly deployed web app.
If you see the error "You do not have permission to view this directory or page.", then the application probably failed to start correctly. Head to the next section and view the log output to find and fix the error. If you aren't able to fix it, contact us by selecting the I ran into an issue button below. We're happy to help!
Update the app
You can deploy changes to this app by using the same process and choosing the existing app rather than creating a new one.
In this section, you learn how to view (or "tail") the logs from the running App Service app. Any calls to
console.log in the app are displayed in the output window in Visual Studio Code.
Find the app in the AZURE APP SERVICE explorer, right-click the app, and choose View Streaming Logs.
When prompted, choose to enable logging and restart the application. Once the app is restarted, the VS Code output window opens with a connection to the log stream.
After a few seconds, you'll see a message indicating that you're connected to the log-streaming service. Refresh the page a few times to see more activity.
```bash 2019-09-20 20:37:39.574 INFO - Initiating warmup request to container msdocs-vscode-node_2_00ac292a for site msdocs-vscode-node 2019-09-20 20:37:55.011 INFO - Waiting for response to warmup request for container msdocs-vscode-node_2_00ac292a. Elapsed time = 15.4373071 sec 2019-09-20 20:38:08.233 INFO - Container msdocs-vscode-node_2_00ac292a for site msdocs-vscode-node initialized successfully and is ready to serve requests. 2019-09-20T20:38:21 Startup Request, url: /Default.cshtml, method: GET, type: request, pid: 61,1,7, SCM_SKIP_SSL_VALIDATION: 0, SCM_BIN_PATH: /opt/Kudu/bin, ScmType: None ```
Congratulations, you've successfully completed this quickstart!
Next, check out the other Azure extensions.
Or get them all by installing the Node Pack for Azure extension pack.