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Kubernetes Ingress vs Gateway API

Kubernetes Ingress vs Gateway API 🔹 What is Ingress? - Ingress is the traditional way to expose HTTP/HTTPS services in Kubernetes. - It uses Ingress Controllers (like NGINX, Traefik, HAProxy) to route traffic into the cluster. - You define rules (host/path → service) in an Ingress resource. ✅ Pros: Simple, widely supported, good for basic routing. ❌ Cons: Limited features (TLS termination, path/host routing only), different controllers add their own non-standard annotations. 🔹 What is Gateway API? 🔅 Gateway API is a next-generation replacement for Ingress. 🔅 Provides more flexibility, consistency, and extensibility. 🔅 Designed with multiple personas in mind: - Infrastructure teams manage Gateways. - Application developers define Routes. 🔅 Supports richer traffic management (weight-based routing, retries, timeouts, header matching, etc.). Key Resources in Gateway API: 🪝 GatewayClass – Defines the type of gateway (like IngressClass). 🪝 Gateway – The actual instance (like a load balancer). 🪝 HTTPRoute – Routes HTTP traffic to services. 🪝 TCPRoute/UDPRoute – Non-HTTP traffic. 🪝 ReferenceGrant – Lets apps in one namespace reference resources in another. ✅ Pros: Standardized, portable across implementations, supports advanced features (blue/green, canary, header-based routing). ❌ Cons: Newer, learning curve is bigger. 🔹 Ingress vs Gateway API — The Core Difference - Ingress = Simple, legacy, limited but widely available. - Gateway API = Modern, modular, scalable, with first-class support for advanced traffic control...

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