Trying to move VM's from local storage to iscsi

We finally got a two node cluster working.  Can create, run, and migrate virtual machines on the iscsi domain.

We have some VMs that were created when we were experimenting that are on local storage.   I've read:

https://access.redhat.com/knowledge/solutions/54060

But I just can't seem to figure out how to do this.   Assume that I have nodes A and B in an iscsi cluster.

I take A down for maintenance and have it join the local DC for that node. 

Then bring A out of maintenance.

At this point,  I *think* I should create a Export/NFS domain... but I am lost from that point on.