[Linux-cluster] Two node question

[Scott Becker <scottb bxwa com>]

I'm building a 3-node cluster.

One public subnet.

No shared filesystem

Starting with just one service (www) on one movable IP address.


I will be routinely bring down one node at a time for maintenance so I 
must configure the cluster for one node operation. I can't use the 
two_node="1" setting because I would have to bring the cluster down to 
set and unset it.

I want to use an IP tie-breaker to verify that the node can reach the 
main router. Is this, along with a self test of the web service, fs 
writable, etc. adequate for one, two and three node operation? Or would 
I also need a Qdisk?


   thanks
   scottb