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Scenario #376
Storage
Kubernetes v1.21, Rook-Ceph

Ceph RBD Volume Mount Failure Due to Kernel Mismatch

Mounting Ceph RBD volume failed after a node kernel upgrade.

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What Happened

The new kernel lacked required RBD modules.

Diagnosis Steps
  • 1dmesg showed rbd: module not found.
  • 2CSI logs indicated mount failed.
Root Cause

Kernel modules not pre-installed after OS patching.

Fix/Workaround
• Reinstalled kernel modules and rebooted node.
Lessons Learned

Kernel upgrades can silently break storage drivers.

How to Avoid
  • 1Validate CSI compatibility post-upgrade.
  • 2Use DaemonSet to check required modules.
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