Write the sample service

To create and deploy a Node.js service, follow these steps:

1. Create a new directory named helloworld and change directory into it:

   mkdir helloworld
   cd helloworld
                   

2. Create a package.json file with the following contents:

   {
     "name": "helloworld",
     "description": "Simple hello world sample in Node",
     "version": "1.0.0",
     "private": true,
     "main": "index.js",
     "type": "module",
     "scripts": {
       "start": "node index.js"
     },
     "engines": {
       "node": ">=16.0.0"
     },
     "author": "Google LLC",
     "license": "Apache-2.0",
     "dependencies": {
       "express": "^4.17.1"
     }
   }
                   

3. In the same directory, create a index.js file, and copy the following lines into it:

   import express from 'express';
   const app = express();
   
   app.get('/', (req, res) => {
     const name = process.env.NAME || 'World';
     res.send(`Hello ${name}!`);
   });
   
   const port = parseInt(process.env.PORT) || 8080;
   app.listen(port, () => {
     console.log(`helloworld: listening on port ${port}`);
   });

   This code creates a basic web server that listens on the port defined by the PORT environment variable.

Your app is finished and ready to be deployed.

Deploy to Cloud Run from source

Important: This quickstart assumes that you have owner or editor roles in the project you are using for the quickstart. Otherwise, refer to the Cloud Run Source Developer role for the required permissions for deploying a Cloud Run resource from source.

Deploy from source automatically builds a container image from source code and deploys it.

To deploy from source:

1. In your source code directory, deploy the current folder using the following command:

   gcloud run deploy --source .

   1. When you are prompted for the service name, press Enter to accept the default name, for example helloworld.

   2. If you are prompted to enable additional APIs on the project, for example, the Artifact Registry API, respond by pressing y.

   3. When you are prompted for region: select the region of your choice, for example us-central1.

   4. If you are prompted to create a repository in the specified region, respond by pressing y.

   5. If you are prompted to allow unauthenticated invocations: respond y. You might not see this prompt if there is a domain restriction organization policy that prevents it; for more details see the Before you begin section.

   Then wait a few moments until the deployment is complete. On success, the command line displays the service URL.

2. Visit your deployed service by opening the service URL in a web browser.