Why you would want to use PersistentVolume

When you're creating your Pods, you have the opportunity to create volumes in order to share files between the containers created by them. However, these volumes can represent a massive problem: they are bound to the life cycle of the Pod that created them.

That is why Kubernetes offers another object called PersistentVolume, which is a way to create storage in Kubernetes that will not be bound to the life cycle of a Pod.

Introducing PersistentVolumes

Just like the Pod or ConfigMap, PersistentVolume is a resource kind that is exposed through kube-apiserver: you can create, update, and delete persistent volumes using YAML and kubectl just like any other Kubernetes objects.

The following command will demonstrate how to list the PersistentVolume resource kind currently provisioned within your Kubernetes cluster:

$ kubectl get persistentvolume
No resource found

The persistentvolume object is also accessible with the plural form of persistentvolumes...