Missing Namespace After Cluster Upgrade

A namespace was missing after performing a cluster upgrade.

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What Happened

After upgrading the cluster, a namespace that was present before the upgrade was no longer available.

Diagnosis Steps

1Checked the cluster upgrade logs and identified that a namespace deletion had occurred during the upgrade process.
2Verified with backup and confirmed the namespace was inadvertently deleted during the upgrade.

Root Cause

An issue during the cluster upgrade process led to the unintentional deletion of a namespace.

Fix/Workaround

• Restored the missing namespace from backups.
• Investigated and fixed the upgrade process to prevent future occurrences.

Lessons Learned

Always backup critical resources before performing upgrades and test the upgrade process thoroughly.

How to Avoid