我的Eureka配置文件如下：

---

spring:

profiles: peer1

application:

name: eureka-server

server:

port: 8761

eureka:

instance:

hostname: localhost

client:

fetch-registry: true

register-with-eureka: false

serviceUrl:

defaultZone: http://localhost:8762/eureka/

---

spring:

profiles: peer2

application:

name: eureka-server

server:

port: 8762

eureka:

instance:

hostname: localhost

client:

fetch-registry: true

register-with-eureka: false

serviceUrl:

defaultZone: http://localhost:8761/eureka/

运行时启动两个实例，profiles分别为peer1和peer2。

启动后访问localhost:8761，eureka界面如下:

1.png

访问localhost:8762，界面如下：

2.png

可见peer1和peer2之间并没有互相注册，因为peer1和peer2中unavailable-replicas和

available-replicas为空，且我在peer1中注册的zuul实例，并没有共享给peer2.

后来发现原因是因为如果hostname写的localhost或者127.0.0.1的话，就会出现这种问题，当时嫌麻烦就用的localhost代替，坑啊。

这是win10改host的教程，将peer1和peer2都指向localhost之后，修改Eureka配置如下：

---

spring:

profiles: peer1

application:

name: eureka-server

server:

port: 8761

eureka:

instance:

hostname: peer1

client:

fetch-registry: true

register-with-eureka: false

serviceUrl:

defaultZone: http://peer2:8762/eureka/

---

spring:

profiles: peer2

application:

name: eureka-server

server:

port: 8762

eureka:

instance:

hostname: peer2

client:

fetch-registry: true

register-with-eureka: false

serviceUrl:

defaultZone: http://peer1:8761/eureka/

再次启动，访问peer2:8762，看到了peer1:8761的信息和zuul实例的信息，问题解决