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Scenario #432
Scaling & Load
Kubernetes v1.22, GCP
Auto-Scaling Hit Limits with StatefulSet
StatefulSet scaling hit limits due to pod affinity constraints.
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What Happened
Auto-scaling did not trigger correctly due to pod affinity constraints limiting scaling.
Diagnosis Steps
- 1Found pod affinity rules restricted the number of eligible nodes for scaling.
- 2Logs showed pod scheduling failure during scale-up attempts.
Root Cause
Tight affinity rules prevented pods from being scheduled to new nodes.
Fix/Workaround
• Adjusted pod affinity rules to allow scaling across more nodes.Lessons Learned
Pod affinity must be balanced with scaling needs.
How to Avoid
- 1Regularly review affinity and anti-affinity rules when using HPA.
- 2Test autoscaling scenarios with varying node configurations.