The cluster was live, but no one could reach it. The code was ready, the nodes were humming, yet traffic stopped at the edge. The missing piece was an Infrastructure Access External Load Balancer.
An external load balancer acts as the public entry point to your internal systems. It takes incoming requests from the internet, distributes them across multiple backend instances, and keeps the service reachable even if one node fails. In cloud environments like Kubernetes, AWS, GCP, or Azure, the Infrastructure Access External Load Balancer configures routing, scaling, and health checks so your application can serve users without interruption.
Without it, external traffic cannot reach your cluster directly. A properly configured Infrastructure Access External Load Balancer opens the correct ports, binds to the right IPs, and enforces security controls. It supports protocols such as HTTP, HTTPS, TCP, and UDP. For HTTPS, it terminates TLS at the edge or passes encrypted traffic to your service. Engineers often use them to connect public APIs, web apps, or real-time services to the outside world while balancing load between regions or availability zones.