Kubernetes Persistent Volumes

Cloud Intermediate

Kubernetes Persistent Volumes¶

KubernetesStorageVolumes 3 min read

Persistent storage in Kubernetes. PV, PVC, StorageClass and cloud provider integration.

PVC Example¶

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: postgres-data
spec:
  accessModes: [ReadWriteOnce]
  storageClassName: gp3
  resources:
    requests:
      storage: 50Gi
---
apiVersion: apps/v1
kind: StatefulSet
spec:
  template:
    spec:
      containers:
        - name: postgres
          volumeMounts:
            - name: data
              mountPath: /var/lib/postgresql/data
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: postgres-data

Access Modes¶

• ReadWriteOnce (RWO) — single node, read-write
• ReadOnlyMany (ROX) — multiple nodes, read-only
• ReadWriteMany (RWX) — multiple nodes, read-write (NFS, EFS)

Summary¶

PVC abstracts the storage provider. Always use StorageClass for dynamic provisioning.

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