Hi. I'm trying to figure out EXACTLY what the process is for getting a cluster working on Ubuntu Raring. 
Most of the clusters I implemented required dlm-controld.pcmk, but I don't see this being shipped anymore in most distributions. 
I've tried to document a how-to for CentOS  on my blog at ha-guru.com, but its been broken by recent updates in pacemaker and incompatibilities so I'd like to update it for a hassle free implementation on say Ubuntu.
The challenge is I'm really confused as to when and why I need CMAN and I'm trying to think about things like learning curve for adapting to the the "new" method for Linux-HA and etc. 

I'm generally using OCFS2 as my cluster fs. I'm may use DRBD and CLVM. Can someone point me in the right direction?