So when I add a new host to the cluster should I expect NFS datastores that have been provisioned using VSC to be mounted to the new host? or is further action required to give that host access to the NFS exports?
If so what?
As far as I can tell - no, NFS datastores will not be mounted automatically to new hosts in a cluster.
You have to mount them manually, either using vCenter GUI, or ESX(i) command line.
Ah, I know what you mean now!
You need to change NFS export security settings, so new hosts' IP addresses (of the VM kernel port) have r/w & root access to that volume.
If they were created with VSC then there on the export permissions for the volume the IP address for the vKernel ports on all your ESX servers will have RW and root permissions. Just add the vKernel IP of the new host to this list and then manually mount the datastore from vCenter.
This type of update is on the roadmap for VSC just so you know...