SpringCloud-Ribbon快速搭建+EurekaServer高可用搭建

一、搭建一個或以上的EurekaServer（本文以兩個爲例）

1. 添加Eureke-Server依賴

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>

2. 添加註解@EnableEurekaServer

@SpringBootApplication
@EnableEurekaServer
public class EurekaServer01Application {
	public static void main(String[] args) {
	SpringApplication.run(EurekaServer01Application.class, args);
	}
}

3. 添加配置

#設置服務端口，eureka server端默認端口是8761
spring:
  application:
    name: eureka-server
#設置服務端口，eureka server端默認端口是8761
server:
  port: 8000
#表示是否將自己註冊到Eureka Server,默認爲true
eureka:
    client:
      register-with-eureka: true
#表示是否從Eureka Server獲取註冊信息,默認爲true
      fetch-registry: true
#暴露給其他eureka client端註冊的地址
      service-url.defaultZone: http://localhost:8001/eureka/
 4. 依據以上步驟再搭建一個EurekaServer注意修改端口號，注意spring.application.name=eureka-server保持一致

二、搭建三個Provider節點

1. 啓動類

@SpringBootApplication
@EnableDiscoveryClient
public class ProviderRibbon01Application {

	public static void main(String[] args) {
		SpringApplication.run(ProviderRibbon03Application.class, args);
	}

}

2. 配置文件

spring:
  application:
    name: provider-ribbon
server:
  port: 10002

eureka:
  client:
    service-url.defaultZone: http://localhost:8000/eureka/,http://localhost:8001/eureka/

3. 按照以上步驟繼續搭建兩個及以上，注意spring.application.name=provider-ribbon保持一致

三、搭建Consumer節點

1. 添加Ribbon依賴

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
</dependency>

2. 添加配置類

import com.netflix.loadbalancer.IRule;
import com.netflix.loadbalancer.RetryRule;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;

/**
 1. @author Eden
 2. @date 2020/5/1 10:17
 */
@Configuration
public class RibbonConfig {
    @Bean
    @LoadBalanced
    RestTemplate restTemplate() {
        return new RestTemplate();
    }
    /**
     * Ribbon默認負載均衡策略是輪詢，現在將其改爲隨機
     * @return
     */
    @Bean
    public IRule demoRule(){
        return new RetryRule();
    }
}

demo代碼
主要是以下幾個模塊

拓展

1. Ribbon原理示意圖