一 介绍
在一些遗留的微服务中,它们可能没有注册到Eureka Server上,甚至根本不是使用Spring Cloud开发的,此时要想使用Ribbon实现负载均衡,要怎么办呢?
Ribbon支持脱离Eureka使用,此时,架构如下图:
二 修改pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.itmuch.cloud</groupId> <artifactId>microservice-consumer-movie-without-eureka</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <!-- 引入spring boot的依赖 --> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.4.3.RELEASE</version> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <!--此处原来是spring-cloud-starter-eureka--> <artifactId>spring-cloud-starter-ribbon</artifactId> </dependency> </dependencies> <!-- 引入spring cloud的依赖 --> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Camden.SR4</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <!-- 添加spring-boot的maven插件 --> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
三去掉启动类ConsumerMovieApplication上的@EnableDiscoveryClient
package com.itmuch.cloud.study; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.client.loadbalancer.LoadBalanced; import org.springframework.context.annotation.Bean; import org.springframework.web.client.RestTemplate; @SpringBootApplication public class ConsumerMovieApplication { @Bean @LoadBalanced public RestTemplate restTemplate() { return new RestTemplate(); } public static void main(String[] args) { SpringApplication.run(ConsumerMovieApplication.class, args); } }
四 修改application.yml
server: port: 8010 spring: application: name: microservice-consumer-movie microservice-provider-user: ribbon: listOfServers: localhost:8000,localhost:8001
五 测试
1 启动两个user微服务
2 启动moive微服务
3 多次访问
http://localhost:8010/log-user-instance,请求依然分摊到两个用户微服务