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Scenario #388
Storage
Kubernetes v1.25, GKE
In-Tree Volume Plugin Migration Caused Downtime
GCE PD plugin migration to CSI caused volume mount errors.
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What Happened
After upgrade, in-tree plugin was disabled but CSI driver wasn’t fully configured.
Diagnosis Steps
- 1Events: failed to provision volume.
- 2CSI driver not installed.
Root Cause
Incomplete migration preparation.
Fix/Workaround
• Re-enabled legacy plugin until CSI was functional.Lessons Learned
Plugin migration is not automatic.
How to Avoid
- 1Review CSI migration readiness for your storage before upgrades.