Techne

Setup NFS server on Debian

sudo apt install -y nfs-kernel-server nfs-common

Configure NFSv4 in /etc/default/nfs-common.

NEED_STATD="no"
NEED_IDMAPD="yes"

Configure NFSv4 in /etc/default/nfs-kernel-server. Disable NFSv2 and NFSv3.

RPCNFSDOPTS="-N 2 -N 3"
RPCMOUNTDOPTS="--manage-gids -N 2 -N 3"

sudo systemctl restart nfs-server

Configure Firewalld.

sudo firewall-cmd --zone=public --permanent --add-service=nfs
sudo firewall-cmd --reload

Setup pseudo filesystem and exports.

sudo mkdir /shared
sudo chown -R nobody:nogroup /shared

Add exported directory to /etc/exports.

/shared <ip address of client>(rw,no_root_squash,no_subtree_check,crossmnt,fsid=0)

Create the NFS table.

sudo exportfs -a

Setup NFS client on Debian

sudo apt install -y nfs-common

Create shared directory.

sudo mkdir -p /mnt/shared

Mount NFS exports. We’ll assume the IP address of the NFS server is 10.0.0.64.

sudo mount.nfs4 10.0.0.64:/ /mnt/shared

Note that the 10.0.0.65:/ is relative to the exported directory. So /mnt/shared on the client is /shared on the server. If you try to mount with mount -t nfs 10.0.0.64:/shared /mnt/shared you will get a no such file or directory error.

/etc/fstab

10.0.0.64:/ /mnt/shared nfs4 soft,intr,rsize=8192,wsize=8192

sudo systemctl daemon-reload
sudo mount -av

Setup NFS server on FreeBSD

Edit /etc/rc.conf.

nfs_server_enable="YES"
nfs_server_flags="-u -t -n 4"
rpcbind_enable="YES"
mountd_flags="-r"
mountd_enable="YES"

Edit /etc/exports.

/data1 -alldirs -mapall=user1 host1 host2 host3
/data2 -alldirs -maproot=user2 host2

Start the services.

sudo service rpcbind start
sudo service nfsd start
sudo service mountd start

After making changes to the exports file, you need to restart NFS for the changes to take effect.

kill -HUP `cat /var/run/mountd.pid`

Setup NFS client on FreeBSD

Edit /etc/rc.conf.

nfs_client_enable="YES"
nfs_client_flags="-n 4"
rpc_lockd_enable="YES"
rpc_statd_enable="YES"

Mount NFS share on client with systemd

Create a file at /etc/systemd/system/mnt-backup.mount.

[Unit]
Description=borgbackup NFS share from FreeBSD
DefaultDependencies=no
Conflicts=umount.target
After=network-online.target remote-fs.target
Before=umount.target

[Mount]
What=10.0.0.119:/coffeeNAS/borgbackup/repositories
Where=/mnt/backup
Type=nfs
Options=defaults,vers=3

[Install]
WantedBy=multi-user.target