Hj Drew,
For the test change the gluster parameter nfs.disabled to false.
Something like gluster volume set volname nfs.dsiable false
Then use shownount -e gluster-node-fqdn
Note: NFS might not be allowed in the firewall.
Then add this NFS domain (don't forget to remove the gluster storage domain before that) and do your tests.
If it works well, you will have to switch off nfs.disable and deploy NFS Ganesha:
gluster volume reset volname nfs.disable
Best Regards,
Strahil Nikolov