Elastic Beanstalk Demo

• Ensure package.json includes a start script that launches your server, e.g. "start": "node index.js".
• Have your server listen on port 3000 (or the port your EB configuration expects).

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1 — Create an Elastic Beanstalk application and environment

1. In the AWS Console, search for Elastic Beanstalk.
2. Create a new application (example name: nodejs-app) and optionally add a description and tags.
3. Create a new environment. For this demo select:
   • Environment tier: Web server
   • Platform: Node.js (choose the version matching your app)

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2 — Prepare and upload your application bundle (zip)

• macOS / Linux:

zip -r eb-demo-v1.zip . -x node_modules/\*

• Windows: right-click the project folder and choose an archive/zip option to create eb-demo-v1.zip.

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3 — Service role, instance profile, and key pair

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4 — Networking and subnets

• ALB in public subnets (internet-facing)
• EC2 application instances in private subnets

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5 — Instance volumes and monitoring

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6 — Security groups and Auto Scaling

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7 — Architecture, instance types, and AMI

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8 — Load balancer settings

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9 — Monitoring, updates, and deployments

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10 — Review and create environment

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11 — Verify the deployed environment and AWS resources

• Instances — EC2 instances created for the environment and the running application.
• Load Balancers — ALB created with listeners forwarding port 80 to target port 3000.
• Target Groups — targets (instances) registered on port 3000.
• Auto Scaling groups — manages instance count for the environment.

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12 — Update and redeploy your application

1. Update application files (for example, change the page header to indicate v2).
2. Create a new zip (e.g., eb-demo-v2.zip) with the updated content.
3. In the Elastic Beanstalk environment page click Upload and Deploy, select the new zip, provide a version label (for example, 1.0.1), choose the deployment policy (rolling recommended), and deploy.

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="css/style.css" />
    <title>Elastic Beanstalk demo v2</title>
  </head>
  <body>
    <h1>Elastic Beanstalk demo v2</h1>
  </body>
</html>

const http = require('http');
const PORT = process.env.PORT || 3000;

const server = http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/html' });
  res.end('<h1>Elastic Beanstalk demo v2</h1>');
});

server.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});

$ node index.js
Server is running on port 3000

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Conclusion

• AWS Elastic Beanstalk Developer Guide
• Elastic Beanstalk Node.js Platform
• Amazon EC2 Auto Scaling
• Application Load Balancer Overview