How do you provide persistent storage to a pod in OpenShift?

How do you provide persistent storage to a pod in OpenShift?

• A. PersistentVolume
• B. StorageClass
• C. ConfigMap
• D. PersistentVolumeClaim

Answer: (D)

Providing persistent storage to a pod centers on requesting storage through a PersistentVolumeClaim. A pod never uses raw storage directly; it mounts a volume that is backed by a PersistentVolume, and the binding between them is done via a PVC. The PVC expresses how much storage is needed and with what access mode, and the cluster binds it to a suitable PV. If no matching PV exists, a StorageClass can dynamically provision one, creating a PV behind the scenes. A ConfigMap, by contrast, stores configuration data and is not used for persistent storage. So, the mechanism a pod uses to access persistent storage is the PersistentVolumeClaim, which the pod references to mount the storage once the claim is bound to a PV.

Providing persistent storage to a pod centers on requesting storage through a PersistentVolumeClaim. A pod never uses raw storage directly; it mounts a volume that is backed by a PersistentVolume, and the binding between them is done via a PVC. The PVC expresses how much storage is needed and with what access mode, and the cluster binds it to a suitable PV. If no matching PV exists, a StorageClass can dynamically provision one, creating a PV behind the scenes. A ConfigMap, by contrast, stores configuration data and is not used for persistent storage. So, the mechanism a pod uses to access persistent storage is the PersistentVolumeClaim, which the pod references to mount the storage once the claim is bound to a PV.