https://matthewpalmer.net/kubernetes-app-developer/articles/kubernetes-volumes-example-nfs-persistent-volume.html
https://cloud.netapp.com/blog/kubernetes-nfs-two-quick-tutorials-cvo-blg
https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner
https://link.medium.com/gCtFt7N2mjb