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Scenario #391
Storage
Kubernetes v1.24, AWS EBS, ext4 filesystem
PVC Resizing Didn’t Expand Filesystem Automatically
PVC was resized but the pod’s filesystem didn’t reflect the new size.
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What Happened
The PersistentVolume was expanded, but the pod using it didn’t see the increased size until restarted.
Diagnosis Steps
- 1df -h inside the pod showed old capacity.
- 2PVC showed updated size in Kubernetes.
Root Cause
Filesystem expansion requires a pod restart unless using CSI drivers with ExpandInUse support.
Fix/Workaround
• Restarted the pod to trigger filesystem expansion.Lessons Learned
Volume expansion is two-step: PV resize and filesystem resize.
How to Avoid
- 1Use CSI drivers that support in-use expansion.
- 2Add automation to restart pods after volume resize.