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Scenario #320
Storage
Kubernetes v1.25, AWS EBS
Zombie Volumes Occupying Cloud Quota
Deleted PVCs didn’t release volumes due to failed detach steps, leading to quota exhaustion.
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What Happened
PVCs were deleted, but EBS volumes stayed in-use, blocking provisioning of new ones due to quota limits.
Diagnosis Steps
- 1Checked AWS Console: volumes remained.
- 2Described events: detach errors during node crash.
Root Cause
CSI driver missed final detach due to abrupt node termination.
Fix/Workaround
• Manually detached and deleted volumes.
• Adjusted controller retry limits.Lessons Learned
Cloud volumes may silently linger even after PVC/PV deletion.
How to Avoid
- 1Use cloud resource monitoring.
- 2Add alerts for orphaned volumes.