老师你好，帮我看看为何这个会不成功呢？

#spring:
#  application:
#    name: demo-eureka
#
#server:
#  port: 8000
#
#eureka:
#  instance:
#    hostname: localhost
#  client:
#    # eureka.client.fetch-registry: 表示是否从 Eureka Server 获取注册信息，默认为true。如果这是一个单点的 Eureka Server，不需要同步其他节点的数据，设为false
#    fetch-registry: false
#    # eureka.client.register-with-eureka: 表示是否将自己注册到 Eureka Server, 默认为true。由于当前应用就是 Eureka Server, 因此设为 false
#    register-with-eureka: false
#    # 设置 Eureka Server 所在的地址，查询服务和注册服务都需要依赖这个地址
#    service-url:
#      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

---
# 配置不同的 Profile, 需要注意, 如果要执行下面的 Profile, 需要将上面的配置注释掉

---
spring:
  application:
    name: demo-eureka
  profiles: server1
server:
  port: 8000
eureka:
  instance:
    hostname: server1
    prefer-ip-address: false
  client:
    service-url:
      defaultZone: http://server2:8001/eureka/,http://server3:8002/eureka/

---
spring:
  application:
    name: demo-eureka
  profiles: server2
server:
  port: 8001
eureka:
  instance:
    hostname: server2
    prefer-ip-address: false
  client:
    service-url:
      defaultZone: http://server1:8000/eureka/,http://server3:8002/eureka/

---
spring:
  application:
    name: demo-eureka
  profiles: server3
server:
  port: 8002
eureka:
  instance:
    hostname: server3
    prefer-ip-address: false
  client:
    service-url:
      defaultZone: http://server1:8000/eureka/,http://server2:8001/eureka/