[CentOS] alternative to rocks cluster

> One thing I have NOT figured out is the limitation of having one  
> front-end, which is a single source of failure for accessing the  
> cluster.

That is my main issue with Rocks as well.  That and the fact that you  
have to have a private and a public network (which although a good  
idea, not always desirable).

Back to the original poster, are you looking for a way to rebuild the  
nodes automatically, remotely, and completely hands off, or just  
merely to rebuild them quickly?  I only deal with a couple of dozen  
nodes (not hundreds), and using kickstart and storing the config  
files on the server allows me to rebuild a node in about 15 minutes,  
of which only the first minute or two requires my attention and  
physical presence.  I wrote a simple Perl script that generates the  
kickstart file for each node.

Alfred