Why Kubernetes Alone Isn’t Enough: The Case for API Gateways and Service Meshes

--- canonical_url: https://faun.pub/why-kubernetes-alone-isnt-enough-the-case-for-api-gateways-and-service-meshes-2ee856ce53a4 If Kubernetes already handles networking, why do we need API Gateways and Service Meshes like Istio? Kubernetes (K8s) has become the go-to platform for deploying and scaling modern applications. It abstracts away infrastructure complexity, automates container orchestration, and provides resilience out of the box. But there’s one question I often get asked: 👉 “If Kubernetes already handles networking, why do we need API Gateways and Service Meshes like Istio?” The short answer: Kubernetes provides the runway, but you still need air traffic control and security checkpoints to ensure safe, controlled travel. Let’s explore why. North-South vs. East-West Traffic To understand the gaps, it’s important to distinguish between two directions of traffic inside Kubernetes: North-South Traffic → communication between external clients and services inside the cluster. (Examp