Custom Metrics Exporter Empowers Kubernetes Autoscaling Beyond CPU/Memory
By exposing app‑specific signals—queue depth, batch latency, WebSocket count—as Prometheus metrics, a custom exporter lets the HorizontalPodAutoscaler react to real workload conditions instead of just CPU or memory. The guide walks through writing the exporter in Go, containerizing it, and wiring it into a cluster for reliable autoscaling.