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You can skip this step if your Kubernetes cluster deployment is on a single VM.

$ ps -ef|grep nfs
root 2205 2 0 15:59 ? 00:00:00 [nfsiod]
root 2215 2 0 15:59 ? 00:00:00 [nfsv4.0-svc]
root 13756 2 0 18:19 ? 00:00:00 [nfsd4_callbacks]
root 13758 2 0 18:19 ? 00:00:00 [nfsd]
root 13759 2 0 18:19 ? 00:00:00 [nfsd]
root 13760 2 0 18:19 ? 00:00:00 [nfsd]
root 13761 2 0 18:19 ? 00:00:00 [nfsd]
root 13762 2 0 18:19 ? 00:00:00 [nfsd]
root 13763 2 0 18:19 ? 00:00:00 [nfsd]
root 13764 2 0 18:19 ? 00:00:00 [nfsd]
root 13765 2 0 18:19 ? 00:00:00 [nfsd]
ubuntu 13820 23326 0 18:19 pts/0 00:00:00 grep --color=auto nfs
$

sudo apt update
sudo apt install nfs-common -y
sudo mkdir /dockerdata-nfs
sudo chmod 777 /dockerdata-nfs


# Option 1:
sudo mount -t nfs -o proto=tcp,port=2049 <hostname or IP address of NFS server>:/dockerdata-nfs /dockerdata-nfs
sudo vi /etc/fstab
# append the following
<hostname of IP address of NFS server>:/dockerdata-nfs /dockerdata-nfs   nfs    auto  0  0


# Option 2:
sudo vi /etc/fstab
# append the following line.
<hostname of IP address of NFS server>:/dockerdata-nfs /dockerdata-nfs   nfs    auto  0  0
# run the following line
sudo mount -a