In a Kubernetes environment, which software is widely used as a lightweight proxy to handle the traffic management between microservices?

• A. Envoy
• B. Nginx
• C. HAProxy
• D. Traefik

Answer: (A)

Envoy is a modern, high-performance L7 proxy built for cloud-native microservices. In Kubernetes, it’s typically deployed as a sidecar alongside each service, enabling fine-grained control of inter-service traffic with features like dynamic routing, load balancing, retries, timeouts, and circuit breaker functionality. Its design supports dynamic configuration through xDS, meaning the control plane can push changes without restarting pods, which is essential for fast-moving microservice environments. This makes it the standard data plane for service meshes (such as Istio), providing reliable, observable traffic management between services. While Nginx, HAProxy, and Traefik are solid proxies, Envoy’s native service-mesh integration and dynamic, per-service capabilities often make it the preferred choice for Kubernetes microservice traffic management.