TL;DR — Running K3s on bare metal or edge? This guide dissects every major Kubernetes load balancer — NGINX, Traefik, MetalLB, HAProxy, Envoy, Cilium, Istio, Linkerd, and K3s's own Klipper — across architecture, performance, K3s compatibility, and real-world use cases. Pick the right one for your stack, once and for all.

🧭 Why This Guide Exists

Kubernetes load balancers are one of the most confusing corners of the cloud-native ecosystem. Search for "best Kubernetes load balancer" and you'll find a dozen blog posts each recommending something different, often without context. When you throw K3s — the lightweight, single-binary Kubernetes distribution from Rancher — into the mix, the confusion compounds further.

K3s ships with its own built-in load balancer (Klipper/ServiceLB) and its own ingress controller (Traefik). But is that the right choice for your production workload?…