Hi Jeff —

This error can occur for a number of reasons, but the most common one I’ve found is that it’s rejecting the IP addr authentication. NFS (as of now) uses IP-address based authentication. You need to make sure that the address in /etc/exports on your master node matches the client nodes.

This means that your line in /etc/exports should read like:

/path/to/export 10.0.0.0/24(...options here...)

Where you replace the IP addr schema with your LAN. For example, if you use 192.168.1.X, it would read 192.168.1.0/24. I’ll update my guide to make it more explicit.