Pod IP Address Changes Causing Application Failures

Application failed after a pod IP address changed unexpectedly, breaking communication between services.

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What Happened

The application relied on static pod IPs, but after a pod was rescheduled, its IP address changed, causing communication breakdowns.

Diagnosis Steps

1Checked pod logs and discovered that the application failed to reconnect after the IP change.
2Verified that the application was using static pod IPs instead of service names for communication.

Root Cause

Hardcoded pod IPs in the application configuration.

Fix/Workaround

• Updated the application to use service DNS names instead of pod IPs.
• Redeployed the application with the new configuration.

Lessons Learned

Avoid using static pod IPs in application configurations.

How to Avoid