Multi-namespace Kubernetes microservices architecture demonstrates production-grade service mesh with API Gateway, Auth, and Orders services. Traffic flows from Internet through Ingress Controller to Ingress Service, enforced by Network Policy, routing to Service A (API Gateway) which orchestrates calls to Service B (Auth) and Service C (Orders). Each service runs as a Deployment with dedicated HPA (Horizontal Pod Autoscaler) for elastic scaling, while Redis Cache StatefulSet and PostgreSQL StatefulSet provide persistent data layers backed by PVCs, DB Secret, and App ConfigMap. Fork this diagram on Diagrams.so to customize namespace boundaries, add monitoring sidecars, or integrate AWS-specific resources like EKS node groups and ALB Ingress.