先看个例子：

spring:
  application:
    name: cms-discovery-eureka-ha
---
spring:
  profiles: peer1                                 
server:
  port: 9092
eureka:
  instance:
    hostname: peer1                              
  client:
    serviceUrl:
      defaultZone: http://peer2:9093/eureka/      

---
spring:
  profiles: peer2
server:
  port: 9093
eureka:
  instance:
    hostname: peer2
  client:
    serviceUrl:
      defaultZone: http://peer1:9092/eureka/

使用方式：假如生成的包名为 cms-eureka-ha.jar

java -jar  cms-eureka-ha.jar  --spring.profiles.active=peer1

java -jar  cms-eureka-ha.jar  --spring.profiles.active=peer2

通过spring.profiles.active指定使用哪个profile启动。

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