Best approach for Dynamic routing

[paphillon]

Hi All,

What is the best approach for implementing Dynamic routing for the below
use case

-Route web service calls to a separate server (location based)
-Route user UI Web requests to a separate server (location based)
-A single server URL for multiple implementations and provide a
mechanism to route to different web service server and UI server based
on customers
e.g.-------------------      Nginx Proxy
                                       
  c 1 proxy.abc.com --->     |  --> Web service server S 1
-------------------------------         |  --> UI server S 1
                                       
  c 2 proxy.abc.com --->     |  --> Web service server S 2
-------------------------------         |  --> UI Server S 2
                                       
  c n proxy.abc.com --->     |  --> Web service server S n
-------------------------------         |  --> UI Server S n
                                       

- Ability to add web service server and UI server dynamically 
- Ease to maintain and possibly have a central repository for the
mapping and Web service server and UI server backend URLs
- Minimum proxy overhead

-paphillon

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,227678,227678#msg-227678