I. Technologies

– Java 1.8 – Maven 3.3.9 – Spring Tool Suite – Version 3.8.1.RELEASE – Spring Boot: 1.5.1.RELEASE

II. Load Balancer

1. Proxy Load Balancer

Advantage & Disadvantage:

• Centralized Load Balancing
• Can be bottle neck
• Single point of failure

2. Client Load Balancer

Spring Cloud Ribbon is a solution for Client Load Balancing.

Advantage & Disadvantage:

• Decentralized Load Balancing
• No bottle neck
• Resilent
• Data can be inconsistent

III. Practice

Create 2 projects: - a Spring Boot project for simple restful services, running at addresses: {localhost:8090,localhost:8091,localhost:8092} - a Spring Boot project for Load Balancing - Ribbon Client, running at address: localhost:8080

Step to do:

• Create Spring Boot project for simple Restful service
• Create Spring Boot project for Ribbon client
• Config Ribbon client
• Create a Load Balancing Rest controller
• Run & check results

1. Create Spring Boot project for simple Restful service

- Using SpringToolSuite, create a SpringBoot project. Then add web dependency:

<dependency>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-web</artifactId>
</dependency>

• Create a simple RestController with 2 requestmappings:

More at:

https://grokonez.com/spring-framework/spring-cloud/create-client-load-balancing-spring-cloud-ribbon-spring-boot

How to create Client Load Balancing with Spring Cloud Ribbon + Spring Boot