Setup NFSv4 Server
Below is how the openMediaVault is configured, the interesting part is fsid=0, instead of connecting to /export/nextcloud as we do in NFSv3 we are going to connect directly to /nextcloud
GNU nano 2.2.6 File: /etc/exports
# This configuration file is auto-generated.
# NFSv4 – pseudo filesystem root
fsid=0: NFS server needs to be able to identify each filesystem that it exports. For NFSv4 server, there is a distinguished filesystem which is the root of all exported filesystem. This is specified with fsid=root or fsid=0 both of which mean exactly the same thing.
To connect with NFSv4 instead of NFSv3 we need to use nfs4 instead of nfs as a filesystem. As stated above, we omitt the /export/ part we usally use with NFSv3
GNU nano 2.2.6 File: /etc/fstab
192.168.64.200:/nextcloud /host/nfs/nextcloud nfs4 rsize=8192,wsize=8192,timeo=14,intr 0 0