The load spikes without warning. Your Kubernetes cluster stands between order and chaos. The Ingress controller is the front line. If you fail to shape resource profiles correctly, the edge crumbles first.
Infrastructure resource profiles for Kubernetes Ingress define how CPU, memory, and concurrency limits are assigned to the gateway that routes HTTP and HTTPS traffic. These profiles control how the Ingress pod consumes cluster resources, and how it responds under stress. Fine‑tuning them is the difference between fast failover and catastrophic latency.
Start by mapping traffic patterns. Identify peak request rates and connection durations. Use Prometheus or similar monitoring to collect time‑series data. Set baseline CPU requests to cover average load. Allocate CPU limits that allow burst handling but keep runaway pods in check. For memory, assign requests that prevent OOM kills during steady traffic, and limits high enough to absorb spikes without starving other workloads.
Next, align resource profiles with Ingress class and type. NGINX, HAProxy, and cloud‑native controllers have different scaling behaviors. Match the resource allocations to the controller’s threading and buffering model. In multi‑tenant clusters, isolate namespaces and set resource quotas to prevent one noisy neighbor from consuming shared ingress capacity.