Provision Ephemeral Storage for a Pod Using a Generic Ephemeral Volume

Scenario

The analytics team needs a worker Pod that writes processed data to a storage volume.

Unlike emptyDir, which is backed by node disk by default, the team wants generic ephemeral storage: a volume that is dynamically provisioned as a PersistentVolumeClaim but still tied to the Pod lifecycle. When the Pod is deleted, the PVC and its data are automatically cleaned up.

Task

Create a Pod named analytics-worker in the analytics namespace with the following specification:

Container named worker:

• Image: cgr.dev/chainguard/busybox:latest
• Creates the /data directory, writes # Analytics Report to /data/index.md, then sleeps for 3600 seconds to keep the container running:

  /bin/sh -c "mkdir -p /data && echo '# Analytics Report' > /data/index.md && sleep 3600"
  

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• Mounts the ephemeral volume at /data

Generic ephemeral volume named ephemeral-storage:

• Type: ephemeral (not emptyDir)
• StorageClass: local-path
• Access mode: ReadWriteOnce
• Storage request: 1Gi

Once the Pod is running, verify the file was written:

kubectl exec analytics-worker -n analytics -c worker -- cat /data/index.md

volumes:
- name: <volume-name>
  ephemeral:
    volumeClaimTemplate:
      spec:
        accessModes:
          - <access-mode>
        storageClassName: <storage-class>
        resources:
          requests:
            storage: <storage-size>

⚒ Test Cases