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Scenario #374
Storage
Kubernetes v1.25, CSI with block mode
PVC Resize Fails on In-Use Block Device
PVC expansion failed for a block device while pod was still running.
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What Happened
Attempted to resize a raw block volume without terminating the consuming pod.
Diagnosis Steps
- 1PVC stuck in Resizing.
- 2Logs: device busy.
Root Cause
Some storage providers require offline resizing for block devices.
Fix/Workaround
• Stopped the pod and retried resize.Lessons Learned
Raw block volumes behave differently than filesystem PVCs.
How to Avoid
- 1Schedule maintenance windows for volume changes.
- 2Know volume mode differences.