Improving the Reliability of Kubernetes Load Balancers

Explore the challenges and solutions for improving Kubernetes load balancer reliability in this 26-minute conference talk by Alexander Constantinescu from Confluent. Delve into the current implementation of load balancers in Kubernetes, examining their critical role in application ingress and the limitations of the simplistic `LoadBalancer` service type. Understand the failure modes that arise from decorrelation between the cluster's networking state and application health. Learn about the computational inefficiencies and missed opportunities for production-grade approaches in the existing mechanism. Discover the proposed improvements, including dynamic traffic routing without reconfiguration and application-specific health checks. Follow the journey from the current implementation to the envisioned north star, gaining insights on how refactored support can better maintain application SLAs. Cover topics such as general load balancer configuration, health checks, connection draining, and performance impact, concluding with practical recommendations for enhancing Kubernetes load balancer reliability.