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Simple Fanout Pattern

The Simple Fanout Pattern is a networking configuration used within Kubernetes Ingress to route traffic from a single entry point to multiple backend services.^[400-devops-06-kubernetes-k8s-ithelp-day9-readme.md]

Core Functionality

This pattern allows a system to route traffic arriving at the same IP address to different [[Services]] based on the request's URL.^[400-devops-06-kubernetes-k8s-ithelp-day9-readme.md] By determining the destination service based on the hostname or pathname, it effectively acts as a load balancer for multiple endpoints.^[400-devops-06-kubernetes-k8s-ithelp-day9-readme.md]

Implementation

In a Kubernetes environment, the Simple Fanout Pattern is typically implemented using an Ingress resource that defines specific rules.^[400-devops-06-kubernetes-k8s-ithelp-day9-readme.md] These rules map specific hostnames to specific backend services, enabling Name-based Virtual Hosting.^[400-devops-06-kubernetes-k8s-ithelp-day9-readme.md]

For example, an Ingress configuration can route requests for foo.com to one service and bar.com to another, even though both traffic streams enter through the same Ingress Controller IP address.^[400-devops-06-kubernetes-k8s-ithelp-day9-readme.md]

Sources

^[400-devops-06-kubernetes-k8s-ithelp-day9-readme.md]