Deleting a persistent volume claim
Starting with IBM Cloud Pak® for Watson AIOps 4.1.0, the AI Model Management user interface no longer requires a persistent volume claim (PVC) to maintain the training job state, which is sometimes called the Luigi state. If you migrated from an earlier version of Cloud Pak for Watson AIOps, you can delete this PVC. If you leave the PVC as it is, it uses disk space but doesn't otherwise impact Cloud Pak for Watson AIOps.
To see whether you have a PVC claim on a cluster, log in to the cluster and confirm that the current namespace is set to the Cloud Pak for Watson AIOps instance namespace. Then, run the following command:
oc get pvc -l app.kubernetes.io/component=luigi-daemon NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE aimanager-aio-luigi-daemon-pvc-aimanager-aio-luigi-daemon-0 Bound pvc-950dfc5e-5b5f-4db7-98fc-eeaefd574368 2Gi RWO rook-cephfs 65d
Next, describe the PVC:
oc describe pvc aimanager-aio-luigi-daemon-pvc-aimanager-aio-luigi-daemon-0 Name: aimanager-aio-luigi-daemon-pvc-aimanager-aio-luigi-daemon-0 ... Capacity: 2Gi Access Modes: RWO Used By: aimanager-aio-luigi-daemon-0
Determine whether the PVC is safe to delete. If the PVC is listed with a
Used Byvalue as shown, it is not safe to delete. Deletion of this data is destructive and cannot be undone.
Used By: aimanager-aio-luigi-daemon-0
Used Byvalue is not listed, you can delete the PVC.
oc delete pvc aimanager-aio-luigi-daemon-pvc-aimanager-aio-luigi-daemon-0