搭建Eureka-Server集群

Eureka作为微服务注册中心, Eureka-Server可以搭建多台服务注册中心实例, 并相互进行注册, 形成高可用的集群.

	
		org.springframework.cloud
		spring-cloud-starter-netflix-eureka-server
	



	
		spring-snapshots
		Spring Snapshots
		https://repo.spring.io/snapshot
		
			true
		
	
	
		spring-milestones
		Spring Milestones
		https://repo.spring.io/milestone
		
			false
		
	



	
		
			org.springframework.cloud
			spring-cloud-dependencies
			Finchley.RELEASE
			pom
			import
		
		
			org.springframework.boot
			spring-boot-dependencies
			2.0.1.RELEASE
			pom
			import
		
	
			

server:
  port: 7001
spring:
  application:
    name: eureka-server

# 集群版
eureka:
  instance:
    hostname: www.eureka01.com # eureka服务端的实例名称, 修改host文件映射的主机名(域名)
    instance-id: eureka01
    prefer-ip-address: true
  server:
    enable-self-preservation: true
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      # 映射上面的主机名
      defaultZone: http://www.eureka01.com:7001/eureka,http://www.eureka02.com:7002/eureka,http://www.eureka03.com:7003/eureka

C:WindowsSystem32driversetchosts文件添加自定义域名, 映射到本地地址127.0.0.1

127.0.0.1 www.eureka01.com
127.0.0.1 www.eureka02.com
127.0.0.1 www.eureka03.com

首先, 编写eureka-server的启动类, 开启Eureka服务端配置(@EnableEurekaServer注解).

@SpringBootApplication
@EnableEurekaServer // 开启Eureka服务端
public class EurekaServerApplication {

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

然后,启动eureka01实例, 并复制eureka02, eureka03实例后启动各个微服务实例, eureka-server各个实例相互注册, 形成高可用的集群.
复制eureka02实例, VM参数:
-Dserver.port=7002 -Deureka.instance.hostname=www.eureka02.com -Deureka.instance.instance-id=eureka02

复制eureka03实例, VM参数:
-Dserver.port=7003 -Deureka.instance.hostname=www.eureka03.com -Deureka.instance.instance-id=eureka03
最后, 访问各位服务实例, 查看eureka-server控制台的服务注册列表:
http://www.eureka01.com:7001/
http://www.eureka02.com:7002/
http://www.eureka03.com:7003/

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