Kubernetes v1.36: New Metric for Route Sync in the Cloud Controller Manager

AI summary

Kubernetes v1.36 introduces a new metric to track route synchronization within the Cloud Controller Manager, specifically designed to evaluate the watch-based route reconciliation feature. By comparing synchronization counts with and without the watch-based approach, operators can measure the reduction in unnecessary API calls to cloud providers in stable clusters.

Key points

• The new route_controller_route_sync_total metric allows operators to quantify the impact of watch-based route reconciliation.
• Watch-based reconciliation triggers updates only upon node changes, effectively replacing inefficient fixed-interval polling loops.
• Reduced sync frequency minimizes API load on infrastructure providers, preserving rate-limited quotas.
• A/B testing the feature gate provides empirical data on API call reduction for specific cluster environments.