I'm looking for some advice on virtualization of a physical cluster. My goal is to virtualize a two node physical cluster without needing to take the cluster offline. The cluster is connected to a SAN via iSCSI.
The plan is to create a new virtual machine and add this as a third node in the cluster. The shared storage can be added to this node through iSCSI initiator. The physical servers have a heartbeat connection by means of a cross-over cable connected between both servers. I am planning to add a simple network hub here so that I can connect the virtual host and run the heartbeat connection through that.
My question is simply if this is a valid cluster configuration? And if so, how can I add the hub without taking the cluster down?