How to automatically delete persistent disks after deleting a Kubernetes cluster?

How to Delete All Persistent Disks Associated with a Deleted Cluster

When a Kubernetes cluster is deleted, persistent disks (PDs) associated with it may persist. To automatically delete these PDs, identify their names or IDs.

Solution:

The Cloud SDK can be utilized with specific filters and formatting to list the disks associated with a GKE cluster.

Command to List All Disks Used by a GKE Cluster:

gcloud compute disks list --format="table(name,users)" --filter="name~^gke-"

Command to List Only Disks Used as PVC:

gcloud compute disks list --format="table(name,users)" --filter="name~^gke-.*-pvc-.*"

Command to List Detached PVC Disks:

gcloud compute disks list --format="table(name,users)" --filter="name~^gke-.*-pvc-.* AND -users:*"

Kubernetes Command to List Cluster's PVs and PD Names:

kubectl get pv -o custom-columns=K8sPV:.metadata.name,GCEDisk:spec.gcePersistentDisk.pdName

API Method for Listing Disks:

disks.list

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