Why Your Kubernetes Ingress Needs Rate Limiting

Episode notes

Lucas and Luna dive into why rate limiting at the Kubernetes ingress layer is a critical, often overlooked practice for modern DevOps teams. They break down a real-world scenario: a startup whose API gateway collapsed under a traffic spike from a single misconfigured client, causing a cascading outage across microservices. Lucas explains the difference between application-level and ingress-level rate limiting, citing specific tools like NGINX Ingress Controller with annotations for requests per second and per-IP limits. He also covers the pitfalls of default configurations that allow unlimited traffic. Luna challenges the assumption that cloud load balancers handle this automatically, and they discuss how to set appropriate limits using Kubernetes annotations without breaking legitimate traffic patterns. The episode ends with a forward-looking question about traffic shaping and cost governance.