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1、準備工做
Eureka can be made even more resilient and available by running multiple instances and asking them to register with each other. In fact, this is the default behaviour, so all you need to do to make it work is add a valid serviceUrl to a peer, e.g.

摘自官網

Eureka經過運行多個實例，使其更具備高可用性。事實上，這是它默認的熟性，你須要作的就是給對等的實例一個合法的關聯serviceurl。

2、改造工做
在eureka-server工程中resources文件夾下，建立配置文件application-peer1.yml:

server:
  port: 8761
 
spring:
  profiles: peer1
eureka:
  instance:
    hostname: peer1
  client:
    serviceUrl:
      defaultZone: http://peer2:8769/eureka/複製代碼

而且建立另一個配置文件application-peer2.yml：

server:
  port: 8769
 
spring:
  profiles: peer2
eureka:
  instance:
    hostname: peer2
  client:
    serviceUrl:
      defaultZone: http://peer1:8761/eureka/複製代碼

這時eureka-server就已經改造完畢。

ou could use this configuration to test the peer awareness on a single host (there’s not much value in doing that in production) by manipulating /etc/hosts to resolve the host names.

按照官方文檔的指示，須要改變etc/hosts，linux系統經過vim /etc/hosts ,加上：

127.0.0.1 peer1
127.0.0.1 peer2複製代碼

windows電腦，在c:/windows/systems/drivers/etc/hosts 修改。

這時須要改造下service-hi:

eureka:
  client:
    serviceUrl:
      defaultZone: http://peer1:8761/eureka/
server:
  port: 8762
spring:
  application:
    name: service-hi複製代碼

架構代碼以下:

資料和源碼來源地址

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