[Pacemaker] how to mount drive on SAN with pacemakerresourceagent?

[Robert van Leeuwen]

> In a simple case, we want to prevent two nodes using a shared file-system 
> without coordination.  If they loose contact with each other and can't 
> coordinate their access, one must die.  (Even if you make it hard for them to 
> loose contact by providing multiple communication channels, you have to assume 
> it will happen and, so, we work with this case.)

Not a real help but...
My preferred way is to create a 3 node cluster even if one node is only for voting and will not run any resources.
With 3 nodes you can correctly "vote" about who's online & offline (2 vs 1 vote).
When none of the 3 nodes see each others quorum will be lost on all nodes and the cluster will freeze (or whatever you configure).

Some cluster suites use a quorum disk for the creating the 3rd vote but as far as I know Pacemaker does not support this.

I'm afraid if a third node is not possible you will have to make absolutely sure the network link stay's up but it won't be 100% fool proof if somebody starts messing with the cables...
(you're best bet will be multi-path + cross cable e.g.)


Robert