What is a Persistent Volume (PV) and a Persistent Volume Claim (PVC) in Kubernetes, and how do they relate to stateful applications?

Question

Accepted Answer

PV and PVC in Kubernetes are used to provide persistent storage for stateful applications.

Persistent Volume (PV) in Kubernetes is a piece of storage in the cluster that has been provisioned by an administrator.
Persistent Volume Claim (PVC) is a request for storage by a user or pod in the cluster.
PVs and PVCs decouple storage from the pod, allowing for easier management and scaling of stateful applications.
PVs can be dynamically provisioned or statically provisioned, depending on the storage class configuration.
Examples: PVs can be backed by various storage types like NFS, iSCSI, or cloud storage solutions like AWS EBS.
Stateful applications like databases or file storage systems benefit from PVs and PVCs for data persistence.

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