Persistent Volume Claim
A Persistent Volume Claim (PVC) is a Kubernetes resource that requests storage with specific characteristics, such as size and access modes, from a cluster's available Persistent Volumes (PVs). It acts as an abstraction layer, allowing users to define their storage needs without managing the underlying storage infrastructure details. Once bound to a matching PV, the PVC provides a way for pods to use persistent storage in a declarative manner.
Developers should use PVCs when deploying stateful applications in Kubernetes that require data persistence across pod restarts or rescheduling, such as databases, file servers, or logging systems. They enable dynamic provisioning and management of storage, ensuring data availability and decoupling storage configuration from application code. This is crucial for maintaining data integrity in cloud-native environments where pods are ephemeral.