HA support for YARN and NameNode UI level

[Mohammad Islam]

Hi,I'm wandering if there is any built-in support in Knox for any (NN/RM) UI to 
automatically forward to active NN/RM.
I saw there is HA support in WebHDFS level. But not sure if I need to do 
anything special for HDFSUI. The same is true for YARNUI.
Regards,Mohammad