Eureka-zookeeper的服务发现替代方案

参考：

https://my.oschina.net/thinwonton/blog/1622905

http://www.open-open.com/lib/view/open1426940722554.html

https://github.com/Netflix/eureka/wiki/Configuring-Eureka

https://www.xujin.org/sc/sc-netflix-eureka/

http://cloud.spring.io/spring-cloud-netflix/