Answer
PVC resize updates PV; kubelet expands filesystem with CSI driver support.
Quick Answer
PV expansion requires the storage backend to support it (not all do). The PVC is updated with a larger size request. The CSI driver's controller plugin expands the cloud volume (AWS EBS, GCE PD). Then the node plugin extends the filesystem inside the container. The Pod may need to be restarted for the filesystem expansion to take effect, depending on the driver.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ