Spring Cloud之 Config Server 的高可用配置

Posted 2020-10-29 shaozm

先看官方文档的配置

---
spring:
  profiles: peer1
eureka:
  instance:
    hostname: peer1
  client:
    serviceUrl:
      defaultZone: http://peer2/eureka/

---
spring:
  profiles: peer2
eureka:
  instance:
    hostname: peer2
  client:
    serviceUrl:
      defaultZone: http://peer1/eureka/

两台注册中心的高可用的时候，就是分别注册到对方上去


同理，三台以上的时候

---
spring:
  profiles: peer1
eureka:
  instance:
    hostname: peer1
  client:
    serviceUrl:
      defaultZone: http://peer2/eureka/,http://peer3/eureka/

---
spring:
  profiles: peer2
eureka:
  instance:
    hostname: peer2
  client:
    serviceUrl:
      defaultZone: http://peer1/eureka/,http://peer3/eureka/

---
spring:
  profiles: peer3
eureka:
  instance:
    hostname: peer3
  client:
    serviceUrl:
      defaultZone: http://peer1/eureka/,http://peer2/eureka/

不论多少台主机，都是将自己注册到除了自己之外的其他注册中心上去
不过这里有一个小问题，就是peer是一个主机名，如果想要使用还需要在host文件中配置，如果想要简单一点，只用ip就可以了。

---
spring:
  profiles: peer1
server:
  port: 8761
eureka:
  instance:
  client:
    serviceUrl:
      defaultZone: http://127.0.0.1:8762/eureka/,http://127.0.0.1:8763/eureka/

---
spring:
  profiles: peer2
server:
  port: 8762
eureka:
  instance:
  client:
    serviceUrl:
      defaultZone: http://127.0.0.1:8761/eureka/,http://127.0.0.1:8763/eureka/

---
spring:
  profiles: peer3
server:
  port: 8763 
eureka:
  instance:
  client:
    serviceUrl:
      defaultZone: http://127.0.0.1:8761/eureka/,http://127.0.0.1:8762/eureka/

这样就可以了，而且官方文档也是这么说的

  如果您在一台知道自己的主机名的机器上运行（默认情况下使用java.net.InetAddress查找），则不需要eureka.instance.hostname。