eureka注册和治理controller层的http服务，供前端组合接口数据，gateway负载均衡，zookeeper注册后端服务层，dubbo做底层服务治理，gateway->eureka->api->dubbo->zookeeper->service,例子中gateway为网关服务，core为eureka服务，soa为controller，server为底层微服务，springCloud+dubbo的配合使用