Deploying a Java Spring Boot API on AWS Elastic Beanstalk: A Step-by-Step Guide

Today, I want to walk you through deploying a Java Spring Boot API on AWS Elastic Beanstalk—a fully managed service that simplifies scaling and deployment. Let’s turn your local Spring app into a cloud-powered API!

Why Elastic Beanstalk?

• No server management: AWS handles infrastructure, load balancing, and auto-scaling.
• Fast deployment: Focus on code, not configuration.
• Supports Java: Perfect for Spring Boot apps (JAR or WAR).

Prerequisites

1. A Spring Boot API (I’ll use a simple REST endpoint).
2. An AWS account (free tier works).
3. AWS CLI and Elastic Beanstalk CLI installed.
4. Maven or Gradle (for building the JAR).

Step 1: Build Your Spring Boot App

Create a basic REST controller:

Package it:

mvn clean package  # Generates target/myapp.jar          

Step 2: Configure Elastic Beanstalk

1. Initialize EB CLI:
2. Create an environment:

Step 3: Deploy Your JAR

Elastic Beanstalk automatically detects your JAR file. Deploy with:

eb deploy          

Wait 5-10 minutes while AWS deploys your app.

Step 4: Verify Deployment

1. Check the status:
2. Open your app in the browser:

Key Configuration Tips

1. Port Settings:
2. Environment Variables:
3. Logs & Debugging:

Troubleshooting Common Issues

• Timeout Errors: Ensure health checks (HTTP:200 at /) are configured.
• Port Conflicts: Double-check server.port matches Elastic Beanstalk’s listener.
• JAR Not Detected: Verify your .jar is in the target folder and named correctly.

Pro Tips

• Blue/Green Deployments: Use eb clone to deploy updates with zero downtime.
• Database Integration: Pair with AWS RDS for managed PostgreSQL/MySQL.
• Custom Domains: Use Route 53 to map a domain to your EB environment.

Final Thoughts

Elastic Beanstalk lets you deploy Spring Boot apps effortlessly while AWS handles the heavy lifting. It’s a game-changer for developers who want scalability without DevOps overhead.

Your Turn! Have you used Elastic Beanstalk for Java apps? Share your tips or questions below! ??

#Java #AWS #SpringBoot #CloudComputing #DevOps #APIDevelopment