Spring Cloud Ribbon实现客户端负载均衡
2024-08-27 22:45:17
1、构建microservice-consumer-movie-ribbon项目，在pom.xml中引入ribbon依赖
在引入Eureka依赖的时候，默认里面含有ribbon依赖
2、添加@LoadBalanced注解，实现负载均衡
ribbon负载均衡策略默认为轮循方式
@SpringBootApplication
@EnableEurekaClientpublic class ConsumeMovieRibbonApplication {
public static void main(String[] args) {
SpringApplication.run(ConsumeMovieRibbonApplication.class, args);
}
@Bean
@LoadBalanced //客户端负载均衡
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
3、自定义负载均衡策略
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration; import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RandomRule;
/**
* @Configuration注解不能放在@SpringBootApplication所在的包下
* 如果放在此包下，默认全部负载均衡使用此策略
* */
@Configuration
@ExcludeFromComponentScan
public class TestConfiguration { /**
* 设置负载均衡的规则为随机
* */
@Bean
public IRule ribbonRule() {
return new RandomRule();
}
}
4、指定对那个客户端使用自定义负载均衡
@SpringBootApplication
@EnableEurekaClient
@RibbonClient(name = "microservice-provider-user", configuration = TestConfiguration.class)
public class ConsumeMovieRibbonApplication {
public static void main(String[] args) {
SpringApplication.run(ConsumeMovieRibbonApplication.class, args);
}
@Bean
@LoadBalanced //客户端负载均衡
public RestTemplate restTemplate(){
return new RestTemplate();
}
}
5、如果@Configuration注解放在@SpringBootApplication所在的包下
a、在@Configuration包下创建ExcludeFromComponentScan注解
package com.wyl.microservicesimpleconsumemovie;
public @interface ExcludeFromComponentScan {
}
b、在入口类中排除此注解不扫描
package com.wyl.microservicesimpleconsumemovie;
@SpringBootApplication
@EnableEurekaClient
@RibbonClient(name = "microservice-provider-user", configuration = TestConfiguration.class)
@ComponentScan(excludeFilters = {@ComponentScan.Filter(type=FilterType.ANNOTATION,value=ExcludeFromComponentScan.class)})
public class ConsumeMovieRibbonApplication {
...
}
c、在TestConfiguration中使用此注解
/**
* @Configuration注解不能放在@SpringBootApplication所在的包及其子包下
* */
@Configuration
@ExcludeFromComponentScan
public class TestConfiguration {
/**
* 设置负载均衡的规则为随机
* */
@Bean
public IRule ribbonRule() {
return new RandomRule();
}
}
6、开启多个microservice-provider-user微服务，测试结果
负载均衡的结果：
111:microservice-provider-user:192.168.1.39:7900
222:microservice-provider-user2:192.168.1.39:7903
111:microservice-provider-user:192.168.1.39:7900
222:microservice-provider-user2:192.168.1.39:7902
111:microservice-provider-user:192.168.1.39:7901
222:microservice-provider-user2:192.168.1.39:7903
111:microservice-provider-user:192.168.1.39:7900
222:microservice-provider-user2:192.168.1.39:7902
111:microservice-provider-user:192.168.1.39:7901
222:microservice-provider-user2:192.168.1.39:7903
111:microservice-provider-user:192.168.1.39:7901
222:microservice-provider-user2:192.168.1.39:7902
111:microservice-provider-user:192.168.1.39:7900
222:microservice-provider-user2:192.168.1.39:7903
111:microservice-provider-user:192.168.1.39:7900
222:microservice-provider-user2:192.168.1.39:7902
microservice-provider-user采用自定义的随机负载均衡，而microservice-provider-user2采用ribbon默认的轮循方式
6、完整代码参见https://i.cnblogs.com/Files.aspx中microservice-spring-cloud-ribbon文件
最新文章
- 了解HTML CSS布局(层叠样式表)
- 习课的视频播放器 video.js
- 一个null引发的错误
- 【JAVA - SSM】之MyBatis查询缓存
- poj 1847 Tram【spfa最短路】
- App上线基本流程
- iOS_SN_CocoaPods使用详细说明( 转)
- vim 打开乱码
- js加载XML文件
- 随笔-SQL的三种存储引擎即三种类型的表
- UVa 10170 - The Hotel with Infinite Rooms
- MySQL“Another MySQL daemon already running with the same unix socket” 报错信息处理
- mysql-笔记--增删改查
- Hbase记录-zookeeper部署
- Java集合源码学习（四）HashMap
- HDU6216
- 水塘抽样(Reservoir Sampling)问题
- 函数getpass
- 子序列个数（fzu2129）
- hibernate sqlite jdbctemplate 待研究