sudo apt-get install -y nfs-kernel-server
All the clients will need nfs-common.
sudo apt-get install -y nfs-common
Create a new raw disk on machine.
Add a file system to that disk. MAKE SURE CORRECT DEVICE!
mkfs.ext4 /dev/sdb
Make a mount point.
sudo mkdir -p /srv/nfs/k8s
Add to /etc/fstab
/dev/sdb /srv/nfs/k8s ext4 defaults 0 1
Add to exports
/srv/nfs/k8s *(rw,sync,no_subtree_check,no_root_squash)
Restart NFS
sudo exportfs -rav
sudo systemctl restart nfs-server
Check on it.
showmount -e nfs-k8s.local
Mount remotely.
sudo mkdir /mnt/k8s
sudo mount -t nfs nfs-k8s.local:/srv/nfs/k8s /mnt/k8s