[Pacemaker] Optional resources?

[Dennis Jacobfeuerborn]

Hi,
I'm working on a redundant NFS setup with the additional constraint that 
the nodes get their IPs in a private network and only the VIP is a 
public IP. This requires that the default route needs to change as well. 
On the node that is hosting the VIP the default route needs to use the 
router of that public IP and on the other node the default route has to 
use the router for the private network.

I figured that I could do this by setting up a Route resource that is 
colocated with the VIP and then create a second Route resource for the 
private network case that is colocated with a -INF relationship with the 
other Route resource so that it is always placed on the other node where 
the public Route is *not* running.

This should work as long as both nodes are fine and I just manually move 
around the resources but the problem is that when one node actually dies 
the public Route will move to the other system but the private Route 
resource now has no place to go and will basically fail.

Is there a way to articulate in Pacemaker that when the private Route 
cannot be places anywhere that this is not a fatal problem?

Regards,
   Dennis