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How to Clean Up Veeam Kasten for Kubernetes Orphaned Volumes on GKE k8s 1.28.x

KB ID: 4610
Product: Veeam Kasten for Kubernetes
Published: 2024-06-12
Last Modified: 2024-06-12
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Purpose

This guide provides instructions on how to clean up Veeam Kasten for Kubernetes provisioned PVs that are not deleted, causing orphaned volumes in the GKE k8s 1.28 release.

It has been observed on GKE  running k8s 1.28, Veeam Kasten for Kubernetes provisioned PVs using in-tree provisioner cannot be deleted via “kubectl delete pvc <pvcname>”, resulting in volume sprawl requiring manual remediation. Restoring from snapshots/backups still functions.

There is no risk of data loss or inability to recover from existing backups.

This issue effects only in-tree provisioner “kubernetes.io/gce-pd”, on GKE k8s 1.28.x.

Solution

Identification Of Issue

This section demonstrates how to check for orphaned volumes in the environment and successfully clean them.

Environment

  • GKE k8s 1.28.x

  • Kasten K10 Version : 6.5.2

  • in-tree provisioned “kubernetes.io/gce-pd”

 

Step 1: Protect workloads using Veeam Kasten for Kubernetes. Verify any Orphaned PVs
  1. Run the Policy to take a Snap+Export and capture the result.
    The following screenshot demonstrates a successful snapshot and export.
Job Run
Despite the reported success in the Dashboard, the report shows a failed status after the export was completed with orphaned volumes: 
status:
message: 'error getting deleter volume plugin for volume "kio-4e1c8777bcd411eeb71cde3cda5267f6-0":
    no volume plugin matched'
  phase: Failed

 

  1. Check for failed PV to trace orphaned volume:
kubectl get pv | grep -i failed
kubectl describe pv <pv-id>

example output:

kubectl get pv |grep -i failed
kio-4e1c8777bcd411eeb71cde3cda5267f6-0     8589934592   RWO            Delete           Failed   kasten-io/kio-4e1c8777bcd411eeb71cde3cda5267f6-0   standard                39m
kio-e747f57abcd111eeb71cde3cda5267f6-0     8589934592   RWO            Delete           Failed   kasten-io/kio-e747f57abcd111eeb71cde3cda5267f6-0   standard                57m
kubectl describe pv kio-4e1c8777bcd411eeb71cde3cda5267f6-0
Events:
  Type     Reason              Age   From                         Message
  ----     ------              ----  ----                         -------
  Warning  VolumeFailedDelete  15m   persistentvolume-controller  error getting deleter volume plugin for volume "kio-4e1c8777bcd411eeb71cde3cda5267f6-0": no volume plugin matched
Step 2: Attempt to Delete the Orphaned PVC

Using the following command attempt to delete the identified orphaned PVC.

kubectl delete pvc <pvc-id> - n kasten-io

Example

kubectl delete pvc kio-4e1c8777bcd411eeb71cde3cda5267f6-0 - n kasten-io
status:
  message: 'error getting deleter volume plugin for volume "kio-4e1c8777bcd411eeb71cde3cda5267f6-0":
    no volume plugin matched'
  phase: Failed
Step 3: Restore Workload

Restore workload from Veeam Kasten for Kubernetes snapshot/export, which succeeds!

Restore

Orphaned Volume Clean-Up Procedure

The following steps outline the process to clean up any orphaned volumes.

  1. Identify GCE Disk names for orphaned volumes.

kubectl get pv --selector k10pvmatchid \
  -o jsonpath='{.items[?(@.status.phase == "Failed")].spec.gcePersistentDisk.pdName}'

  1. Clean up orphaned disks from GCE.

disks=$(kubectl get pv --selector k10pvmatchid -o jsonpath='{.items[?(@.status.phase == "Failed")].spec.gcePersistentDisk.pdName}')
for disk in $disks; do
  gcloud compute disks delete $disk --quiet
done

  1. Clean up failed Veeam Kasten for Kubernetes PV Resources in k8s cluster.

failedpvs=$(kubectl get pv --selector k10pvmatchid -o jsonpath='{.items[?(@.status.phase == "Failed")].metadata.name}')
for failedpv in $failedpvs; do
  kubectl delete pv $failedpv
done

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