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README.md

Creating and Deploying an Application using AWS Elastic Beanstalk

📘 Objective

In this lab, we will:

  • Create an AWS Elastic Beanstalk application
  • Create an Elastic Beanstalk environment
  • Deploy a sample application
  • Understand the resources created by Elastic Beanstalk
  • Access the deployed application from the browser

📋 Prerequisites

Before starting this lab, ensure you have:

  • AWS Account
  • IAM user with appropriate permissions
  • Basic understanding of:
    • EC2
    • Security Groups
    • Load Balancer
    • Auto Scaling

🏗️ Architecture

User
  ↓
Elastic Beanstalk
  ↓
Load Balancer
  ↓
EC2 Instance
  ↓
Application

Elastic Beanstalk automatically creates:

  • EC2 instance
  • Security Group
  • Load Balancer (optional)
  • Auto Scaling Group
  • CloudWatch monitoring

🚀 Step 1 — Login to AWS Console

  1. Open AWS Console
  2. Search for:
Elastic Beanstalk
  1. Open the service

🚀 Step 2 — Create Application

Click:

Create Application

Application Configuration

Application Name

my-demo-app

Environment Information

Environment Name

my-demo-env

Domain

AWS automatically generates:

my-demo-env.region.elasticbeanstalk.com

🚀 Step 3 — Select Platform

Under:

Platform

Choose:

Node.js

You may also choose:

  • Python
  • Docker
  • Java
  • PHP
  • Go

🚀 Step 4 — Upload Application Code

Under:

Application Code

Choose:

Sample Application

Elastic Beanstalk provides a demo application.

🚀 Step 5 — Configure Presets

Choose:

Single Instance

Used for:

  • Development
  • Testing

For production environments, choose:

High Availability

🚀 Step 6 — Create Application

Click:

Create Application

Elastic Beanstalk now starts creating resources.

⏳ Resources Created Automatically

Elastic Beanstalk automatically provisions:

Resource Purpose
EC2 Instance Runs application
Security Group Controls traffic
Auto Scaling Group Scaling management
Load Balancer Traffic distribution
CloudWatch Monitoring
S3 Bucket Stores application versions

📦 Deployment Process

Elastic Beanstalk performs:

  1. EC2 provisioning
  2. Platform installation
  3. Application deployment
  4. Health checks
  5. Environment startup

🌐 Step 7 — Access Application

Once environment health becomes:

Green

Open the provided URL:

http://my-demo-env.region.elasticbeanstalk.com

You should see the sample application page.

🔍 Step 8 — Explore Elastic Beanstalk Dashboard

Inside the environment dashboard, explore:

  • Health
  • Logs
  • Monitoring
  • Configuration
  • Events

🖥️ Step 9 — View EC2 Instance

Navigate to:

EC2 Console

You will notice Elastic Beanstalk created:

  • EC2 instance
  • Security Group
  • Key pair (optional)

⚖️ Step 10 — View Load Balancer

If High Availability was selected:

Navigate to:

EC2 → Load Balancers

Elastic Beanstalk automatically creates:

Application Load Balancer

📈 Step 11 — View Auto Scaling Group

Navigate to:

EC2 → Auto Scaling Groups

Elastic Beanstalk automatically creates scaling policies.

📊 Step 12 — Monitoring

Navigate to:

CloudWatch

Monitor:

  • CPU Utilization
  • Network Traffic
  • Request Count
  • Instance Health

🔐 Step 13 — Security Group

Navigate to:

EC2 → Security Groups

Verify inbound rules:

Port Protocol Purpose
80 HTTP Web traffic
22 SSH SSH access

🧪 Testing the Application

Test:

  • Browser accessibility
  • Health status
  • Response time

🗂️ Understanding Environment Health

Color Meaning
Green Healthy
Yellow Warning
Red Critical
Grey Pending

🔄 Updating the Application

To deploy new application versions:

  1. Go to:
Elastic Beanstalk → Upload and Deploy
  1. Upload new ZIP file
  2. Deploy application

Elastic Beanstalk automatically updates the environment.

🧹 Step 14 — Terminate Resources

To avoid AWS charges:

  1. Open Elastic Beanstalk
  2. Select environment
  3. Click:
Actions → Terminate Environment

📌 Important Notes

  • Elastic Beanstalk uses EC2 internally
  • Infrastructure is automatically managed
  • Application deployment is automated
  • Environment URL is auto-generated
  • Monitoring is integrated with CloudWatch

💡 Best Practices

  • Use High Availability for production
  • Enable Auto Scaling
  • Store secrets securely
  • Use separate RDS databases
  • Enable HTTPS using ACM

❓ Troubleshooting

Application Not Opening

Check:

  • Security Group
  • Health status
  • EC2 instance state

Environment Health is Red

Check:

  • Application logs
  • Deployment logs
  • Platform compatibility

Deployment Failed

Verify:

  • ZIP structure
  • Platform version
  • Application dependencies

🧠 Interview Questions

What happens when you create an Elastic Beanstalk environment?

Elastic Beanstalk automatically provisions infrastructure such as EC2, Auto Scaling, Load Balancer, and Security Groups.

Does Elastic Beanstalk create EC2 instances?

Yes.

What is the difference between Single Instance and High Availability?

Single Instance High Availability
One EC2 instance Multiple EC2 instances
No Load Balancer Uses Load Balancer
Used for testing Used for production