how does 1.zuul directly perform client-side load balancing in spring boot2 cloud? 
 2. Environment: spring boot 2 spring cloud,zuul do gateway 
 3. Want to implement: how can two same consumer producers ab,a have one more ResquestMapping, than b to access the service in zuul if b is polled, b has no service so it will directly access a service at the zuul layer, and then return the information to the client? 
 4. Other: I don"t know if I misconfigured ribbon or how. There is no following configuration in spring boot2 
 ribbon: 
-number of sharp retries on the current instance 
 MaxAutoRetries: 1 
-number of sharp switch instance retries 
 MaxAutoRetriesNextServer: 2 
-timeout for sharp request processing 
 ReadTimeout: 60000 
-sharp request connection timeout 
 ConnectTimeout: 60000 
-sharp retries all operation requests 
 OkToRetryOnAllOperations: true 
