Failed Pod-to-Service Communication Due to Port Binding Conflict

Pods couldn’t communicate with services because of a port binding conflict.

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What Happened

A service was configured with a port that was already in use by another pod, causing connectivity issues.

Diagnosis Steps

1Inspected service and pod configurations using kubectl describe to identify the port conflict.
2Found that the service port conflicted with the port used by a previously deployed pod.

Root Cause

Port binding conflict caused the service to be unreachable from the pod.

Fix/Workaround

• Changed the port for the service to a free port and re-applied the service configuration.
• Verified that pod communication was restored.

Lessons Learned

Properly manage port allocations and avoid conflicts.

How to Avoid

1Use port management strategies and avoid hardcoding ports in services and pods.
2Automate port management and checking within deployment pipelines.