Pod Scheduling Failure Due to Taints and Tolerations Misconfiguration

Pods failed to schedule because the taints and tolerations were misconfigured, preventing the scheduler from placing them on nodes.

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What Happened

The nodes had taints that were not matched by the pod's tolerations, causing the pods to remain unscheduled.

Diagnosis Steps

1Used kubectl describe pod to investigate scheduling issues.
2Found that the taints on the nodes did not match the tolerations set on the pods.

Root Cause

Misconfiguration of taints and tolerations in the node and pod specs.

Fix/Workaround

• Corrected the tolerations in the pod specs to match the taints on the nodes.
• Re-applied the pods and verified that they were scheduled correctly.

Lessons Learned

Always ensure taints and tolerations are correctly configured in a multi-tenant environment.

How to Avoid