🎯 Elastic Beanstalk

Introduction

AWS Elastic Beanstalk is a managed service for deploying and scaling web applications and APIs quickly.

Key Learning Outcomes

By the end of this lesson, you'll understand:

• Creating Elastic Beanstalk applications

• Deploying applications

• Configuring environments

• Scaling applications

• Monitoring health

• Managing updates

Creating an Application

# Initialize Elastic Beanstalk
eb init -p "node.js 18 running on 64bit Amazon Linux 2" my-app

# Create environment
eb create production

# Deploy application
eb deploy

# Open in browser
eb open

Application Configuration

Node.js Express App:

const express = require('express');
const app = express();

const PORT = process.env.PORT || 3000;

app.get('/', (req, res) => {
  res.send('Hello from Elastic Beanstalk!');
});

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

Environment Configuration

# .ebextensions/env.config
option_settings:
  aws:autoscaling:asg:
    MinSize: 1
    MaxSize: 4
  aws:autoscaling:trigger:
    MeasureName: CPUUtilization
    Statistic: Average
    Unit: Percent
    UpperThreshold: 80
    LowerThreshold: 20

Scaling

# Scale environment
eb scale 4

# Configure autoscaling
eb config
# Edit MinSize, MaxSize, TargetTrackingScalingPolicy

Monitoring

# View environment health
eb health

# View logs
eb logs

# SSH into instance
eb ssh

Key Takeaways

• **Beanstalk** manages infrastructure automatically

• **Deploy** directly from source code

• **Autoscaling** handles variable load

• **Health monitoring** ensures availability

• **Easy updates** with zero downtime

Next Steps

Learn about Lambda for serverless, or explore S3 for static hosting.