Java Spring Boot Eureka Service Discovery & Load Balancing + API Gateway Explained

🔥 Learn Spring Boot Service Discovery with Netflix Eureka and build scalable microservices with Spring Cloud Load Balancing using `lb://user-service`.

In this hands-on Java Spring Boot tutorial, we’ll build a complete microservices architecture where services register dynamically with Eureka Server, and the API Gateway routes requests automatically using Spring Cloud LoadBalancer**—without hardcoded URLs.

You’ll also learn how to run multiple instances of the same service, test load balancing, and demonstrate *automatic failover* when one instance goes down.

This is a must-know concept for building resilient, scalable, and cloud-native microservices.

🚀 What You’ll Learn

✅ What Service Discovery is and why it matters
✅ How to set up Netflix Eureka Server
✅ Register microservices as Eureka Clients
✅ Run multiple service instances with dynamic ports
✅ Configure unique Eureka instance IDs
✅ Build an API Gateway with Spring Cloud Gateway
✅ Replace hardcoded URLs using `lb://user-service`
✅ Understand how Spring Cloud LoadBalancer works
✅ Test automatic request distribution across instances
✅ Demonstrate failover when a service instance goes down

🛠 Technologies Used

Java 17
Spring Boot 3
Spring Cloud
Netflix Eureka
Spring Cloud Gateway
Spring Cloud LoadBalancer
Maven
IntelliJ IDEA
Postman
By the end of this tutorial, you'll understand how modern microservices discover and communicate with each other dynamically—without manual configuration.

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Видео Java Spring Boot Eureka Service Discovery & Load Balancing + API Gateway Explained канала MasterLAB Systems