springcloud之Eureka集群 二

一、容灾server集群

复制上例中的server项目两个，分别命名为x-server2和x-server3，修改yml配置

①端口：三个服务器的端口分别为9010，9011，9012

②defaultZone：三个服务器的defaultZone分别为对方，即排除自己之外的两个，即A填写BC的地址，B填写AC的地址，C填写AB的地址。

③name：修改三个server的name，做区分。

三个server的具体yml配置如下

server:
  port: 9010
  
eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://localhost:9011/eureka/,http://localhost:9012/eureka/
  server:
    enable-self-preservation: false

spring:
  application: 
    name: eureka-server-9010

server:
  port: 9011
  
eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://localhost:9010/eureka/,http://localhost:9012/eureka/
  server:
    enable-self-preservation: false

spring:
  application: 
    name: eureka-server-9011

server:
  port: 9012
  
eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://localhost:9010/eureka/,http://localhost:9011/eureka/
  server:
    enable-self-preservation: false

spring:
  application: 
    name: eureka-server-9012

为了演示配置用3台，两台即可，最好物理上做区分为2台。

二、eureka client集群

复制上例中的client项目两个，分别命名为x-client2和x-client3，修改yml配置

①端口：三个客户端的端口分别为9020，9021，9022

②defaultZone：三个客户端的defaultZone分别为三个server

③name：三个客户端分别修改name，做区分

三个客户端的yml配置如下：

server:
  port: 9020

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:9010/eureka/,http://localhost:9011/eureka/,http://localhost:9012/eureka/
  
spring:
  application:
    name: eureka-client-9020

server:
  port: 9021

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:9010/eureka/,http://localhost:9011/eureka/,http://localhost:9012/eureka/
  
spring:
  application:
    name: eureka-client-9021

server:
  port: 9022

eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:9010/eureka/,http://localhost:9011/eureka/,http://localhost:9012/eureka/
  
spring:
  application:
    name: eureka-client-9022

结果如下：

可尝试关闭掉当前注册进的server，然后观察其他两个server的变化情况