Kubernetes CKA sample exam question 110 with answer

Question
Create PersistentVolume called pv-wait that can only be provisioned and mapped when a PersistentVolumeClaim is created which is further consumed by Pod.
Create necessary dependent resources.

Answer
The trick in this question is to create a StorageClass first with volumeBindingMode set to WaitForFirstConsumer.
This binding mode indicates that provisioning and binding occurs once the PersistentVolumeClaim is created. Default binding mode is Immediate.
Create custom StorageClass:

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer

Next create a PersistentVolume using the custom StorageClass:

apiVersion: v1
kind: PersistentVolume
metadata:
  name: pv-wait
spec:
  storageClassName: local-storage
  capacity:
    storage: 1Gi
  accessModes:
  - ReadWriteMany
  hostPath:
    path: "/mnt/data"