Mastering Kubernetes - Second Edition

Making persistent volume claims

When containers want access to some persistent storage they make a claim (or rather, the developer and cluster administrator coordinate on necessary storage resources to claim). Here is a sample claim that matches the persistent volume from the previous section:

kind: PersistentVolumeClaimapiVersion: v1metadata:  name: storage-claimspec:  accessModes:    - ReadWriteOnce  resources:    requests:      storage: 80Gi  storageClassName: "normal"  selector:    matchLabels:      release: "stable"    matchExpressions:      - {key: capacity, operator: In, values: [80Gi, 100Gi]}

The name storage-claim will be important later when mounting the claim into a container.

The access mode in the spec is ReadWriteOnce, which means if the claim is satisfied ...