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You can skip this step if your Kubernetes deployment is on a single VM or physical system.

More investigation is needed (as part of a multi-nodes Kubernetes cluser) as we're seeing a "Operation not permitted" error in the sdnc-dbhost pod when deploying an SDN-C cluster with the mounted /dockerdata-nfs from this instruction:

ubuntu@sdnc-k8s:~/oom/kubernetes/oneclick$ kubectl logs sdnc-dbhost-3029711096-w1szw -n onap-sdnc

[Entrypoint] MySQL Docker Image 5.6.38-1.1.2

chown: changing ownership of '/var/lib/mysql/': Operation not permitted

ubuntu@sdnc-k8s:~/oom/kubernetes/oneclick$ kubectl logs consul-agent-3312409084-3560z -n onap-consul

chown: /consul/config: Operation not permitted

ubuntu@sdnc-k8s:~/oom/kubernetes/oneclick$ 

sudo apt install nfs-common 
sudo mkdir /dockerdata-nfs
sudo chmod 777 /dockerdata-nfs
sudo mount -t nfs -o proto=tcp,port=2049 <host|IP of k8s-master master node vm>:/export/dockerdata-nfs /dockerdata-nfs   nfs    auto  0  0:/export/dockerdata-nfs /dockerdata-nfs
sudo vi /etc/fstab
# append "<host|IP of k8s master node vm>:/export/dockerdata-nfs /dockerdata-nfs   nfs    auto  0  0"