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Scenario #54
Cluster Management
K8s v1.23, Bare Metal
Failed Node Recovery Due to Corrupt Kubelet Configuration
Node failed to recover after being drained due to a corrupt kubelet configuration.
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What Happened
After a node was drained for maintenance, it failed to rejoin the cluster due to a corrupted kubelet configuration file.
Diagnosis Steps
- 1Checked kubelet logs and identified errors related to configuration loading.
- 2Verified kubelet configuration file on the affected node and found corruption.
Root Cause
A corrupted kubelet configuration prevented the node from starting properly.
Fix/Workaround
• Replaced the corrupted kubelet configuration file with a backup.
• Restarted the kubelet service and the node successfully rejoined the cluster.Lessons Learned
Regular backups of critical configuration files like kubelet configs can save time during node recovery.
How to Avoid
- 1Automate backups of critical configurations.
- 2Implement configuration management tools for easier recovery.