Spring Boot

Article 20: Deploying Spring Boot Applications

By Utility Zone · 2026-01-27T18:28:30.095599

1. Introduction

Building an application is only half the journey. Deployment is where your application becomes real and usable by others.

In this article, you’ll learn:

  • How Spring Boot apps are deployed
  • Common cloud deployment options
  • What to care about in production

2. What Does “Deployment” Mean?

Deployment means:

  • Making your application accessible over the internet
  • Running it reliably on servers
  • Managing configuration, logs, and health

Spring Boot apps are deployment-friendly by design.

3. Deployment Models

3.1 JAR Deployment

  • Build JAR
  • Run using java -jar
  • Simple and fast

Used in:

  • Virtual machines
  • Cloud platforms
  • Containers

3.2 Container-Based Deployment

  • Docker image
  • Run via Docker / Kubernetes

Preferred for:

  • Modern cloud environments
  • Microservices

4. Things to Prepare Before Deployment

✔ Application runs locally
✔ Externalized configuration
✔ Logs properly configured
✔ Health endpoint available
✔ Secrets NOT in code

These are non-negotiable for production.

5. Deploying to Render (Beginner Friendly)

Render is simple and popular for Spring Boot.

Steps:

  1. Push code to GitHub
  2. Create new Web Service on Render
  3. Choose Docker or JAR-based deploy
  4. Set environment variables
  5. Deploy

Render automatically:

  • Builds your app
  • Exposes public URL
  • Restarts on failure

6. Deploying to Railway

Railway offers:

  • Simple UI
  • Built-in DBs
  • Environment variables

Steps:

  1. Connect GitHub repo
  2. Select Java / Docker
  3. Configure env vars
  4. Deploy

7. Deploying to AWS (High Level)

Common AWS options:

  • EC2 (VM-based)
  • Elastic Beanstalk (managed)
  • ECS / EKS (container-based)

For beginners: ✔ Elastic Beanstalk is easiest

8. Environment Variables in Cloud

Cloud platforms allow:

  • Secure secret storage
  • Runtime configuration

Example:

SPRING_PROFILES_ACTIVE=prod
DB_PASSWORD=securevalue

Spring Boot reads them automatically.

9. Health Checks & Monitoring

Always expose:

/actuator/health

Cloud platforms use health checks to:

  • Restart failed instances
  • Detect downtime

10. Logging in Production

Best practices:

  • Log to console (cloud collects logs)
  • Avoid file-based logging
  • Never log sensitive data

Use structured logs when possible.

11. Common Deployment Failures

❌ App crashes due to missing env vars
❌ Port mismatch
❌ Memory limits exceeded
❌ Database connectivity issues

Always check:

  • Logs
  • Health endpoint
  • Platform metrics

12. Production Checklist

Before going live: ✔ Profiles configured
✔ Swagger disabled or secured
✔ Actuator endpoints secured
✔ Secrets externalized
✔ CORS configured (if needed)

13. What You Should Understand Before Moving On

You should now know:

  • How Spring Boot apps are deployed
  • Differences between platforms
  • What production readiness means
  • How to debug deployment issues

14. What’s Next?

➡ Final Phase: Capstone Project

  • Build a complete real-world application
  • Apply everything learned so far
  • Prepare for interviews & real jobs

Type Next when you’re ready to start the capstone 🚀