Eureka high-availability cluster hand-held construction

Hand-in-hand project construction

1. Select mirror

2. Write mvn configuration

3. Choose Eureka Server

Single node construction

1. Add @EnableEurekaServer annotation to the startup class

package com.bl.eureka;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;

/**
 * @autor BarryLee
 */
@SpringBootApplication
@EnableEurekaServer
public class LearnEurekaApplication {
    
    

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

}

2. Write the configuration file application.properties, I use properties, the same with yml

#这个和service-url一致，否则会发现unavailable
server.port=7900
#是否将自己注册到Eureka Server,默认为true，由于当前就是server，故而设置成false，表明该服务不会向eureka注册自己的信息
eureka.client.register-with-eureka=false
#是否从eureka server获取注册信息，由于单节点，不需要同步其他节点数据，用false
eureka.client.fetch-registry=false
#设置服务注册中心的URL，用于client和server端交流
eureka.client.service-url.defaultZone=http://localhost:7900/eureka/

3. Start, then open http://localhost:7900/

High-availability cluster construction

1. Modify the host file, the location of win10 is: C:\Windows\System32\drivers\etc

host文件末尾加上
127.0.0.1 eureka-7900
127.0.0.1 eureka-7901
127.0.0.1 eureka-7902

2. On the basis of the above operations, add a file application-eureka-7900.properties

#web端口，服务是由这个端口处理rest请求的
server.port=7900
#是否将自己注册到其他Eureka Server,默认为true 需要
eureka.client.register-with-eureka=true
#是否从eureka server获取注册信息， 需要
eureka.client.fetch-registry=true
#设置服务注册中心的URL，用于client和server端交流
#此节点应向其他节点发起请求
eureka.client.serviceUrl.defaultZone=http://eureka-7901:7901/eureka/,http://eureka-7902:7902/eureka/
#主机名，必填
eureka.instance.hostname=eureka-7900
management.endpoint.shutdown.enabled=true

3. application-eureka-7901.properties

#web端口，服务是由这个端口处理rest请求的
server.port=7901
#是否将自己注册到其他Eureka Server,默认为true 需要
eureka.client.register-with-eureka=true
#是否从eureka server获取注册信息， 需要
eureka.client.fetch-registry=true
#设置服务注册中心的URL，用于client和server端交流
#此节点应向其他节点发起请求
eureka.client.serviceUrl.defaultZone=http://eureka-7900:7900/eureka/,http://eureka-7902:7902/eureka/
#主机名，必填
eureka.instance.hostname=eureka-7901
management.endpoint.shutdown.enabled=true

4. application-eureka-7902.properties

#web端口，服务是由这个端口处理rest请求的
server.port=7902
#是否将自己注册到其他Eureka Server,默认为true 需要
eureka.client.register-with-eureka=true
#是否从eureka server获取注册信息， 需要
eureka.client.fetch-registry=true
#设置服务注册中心的URL，用于client和server端交流
#此节点应向其他节点发起请求
eureka.client.serviceUrl.defaultZone=http://eureka-7900:7900/eureka/,http://eureka-7901:7901/eureka/
#主机名，必填
eureka.instance.hostname=eureka-7902
management.endpoint.shutdown.enabled=true

5. At this point, the setup is complete, and then it is running

Copy three

Specified profile

The other two are the same

Then confirm, start these three services, there will be errors in the middle, because they are registering with each other, and the other services have not been up, open it after getting up: http://localhost:7900/, it must be sure, unavaliable must be Empty