[CentOS] Cron and Cluster

I need an idea on how to accomplish this: I have a cluster that I only want
to run cron jobs on when its active.

I know the cron script can check for node status, but then I have multiple
copies to maintain wheres my existing resources all reference config on the
shard fs (httpd/sql etc) so a change on the active node makes that permanent
on the next node.

Any idea how to do this?

Thanks!
jlc