Performance and load testing in Identity Management (IdM) systems using encrypted DNS (eDNS) and CoreDNS in OpenShift clusters

This article analyzes the performance of Identity Management (IdM) systems with respect to encrypted DNS (eDNS) and CoreDNS within OpenShift clusters. It evaluates performance through various testing scenarios, including direct and indirect resolutions using different DNS protocols (UDP, TCP, DoT), detailing extensive tuning and optimizations to maximize throughput and minimize latency. The findings demonstrate that while encrypted DNS incurs some overhead, the trade-offs in security are negligible in terms of performance impact for real-world applications.