Storage

CKA v1.35 · Storage (10%) → "Implement storage classes and dynamic volume provisioning" → "Configure volume types, access modes and reclaim policies" → "Manage persistent volumes and persistent volume claims" Target time: 12 minutes

In namespace data:

1. Create a StorageClass fast-retain:

   • provisioner rancher.io/local-path (what this cluster has)
   • reclaimPolicy Retain
   • volumeBindingMode WaitForFirstConsumer
   • NOT the cluster default

2. Create a PVC records using that class:

   • accessModes ReadWriteOnce
   • requests 128Mi

3. Create a Pod writer (image busybox:1.36) that mounts records at /data and stays running, e.g.: sh -c 'echo hello > /data/f; sleep 3600'

4. The PVC must end up Bound and the pod Running.

Before you create the pod, look at the PVC's status and be able to explain it. That is the lesson here.