3 — Persistent Volume Claims

Kubernetes

A book-shaped table of contents for Kubernetes: cloud-native foundations, the CKAD/CKA/CKS certification tracks, control-plane internals, platform tooling, multi-cluster architecture, and MAANG-level system design and interview prep — cross-linking the existing Prometheus, Observability, and Platform Engineering chapters instead of duplicating them.

5 — CSI Drivers

The Container Storage Interface moved vendor-specific storage code out of Kubernetes core entirely, so new backends can ship as independently versioned plugins instead of waiting on a Kubernetes release.

2 — Persistent Volumes

PersistentVolumes decouple storage provisioning from pod scheduling by making storage a cluster-scoped resource with its own lifecycle, independent of any pod or namespace.

6 — Stateful Storage Design

Pairing StatefulSet ordinal identity with per-replica PVCs is what lets a rescheduled database pod reattach to its own disk instead of a peer's, which is the whole trick behind running stateful workloads on Kubernetes.

4 — Storage Classes

StorageClasses turn PV provisioning into a self-service API, letting a PVC request storage by named profile instead of an admin having to hand-create a matching PV first.