Namespaced load balancer mappings?

[GSGerritsen]

Following the docs, I'm currently setting up my cluster like this: k3d cluster create --api-port 6550 -p "8081:80@loadbalancer" --agents 2.

For some integration tests, I'm creating a dedicated namespace. I'm wondering if there is a way to create a mapping that is namespace-sensitive?

e.g. something like 8082:80@loadbalancer/<test-namespace>, where traffic from localhost:8082 hits the ingress resource in the specified namespace.

More generally, when I run kubectl get ingress and kubectl get ingress -n <test-namespace>, they return the same result. I'm sure this is expected but I don't quite understand how it works, i.e. how does Traefik determine where it's sending traffic (default vs namespaced services)?

[iwilltry42]

Hi @GSGerritsen , the loadbalancer that you configure using -p "8081:80@loadbalancer" is managed by k3d and is external to your Kubernetes cluster, e.g. it's only forwarding traffic from the outside (e.g. your host from where you connect to the cluster running in Docker) to the cluster nodes.
In there, (as you correctly stated), Traefik, as the Kubernetes Ingress Controller takes over.
How the Kubernetes Ingress works is a general concept (see https://kubernetes.io/docs/concepts/services-networking/ingress/) and Traefik "just" implements it (see https://doc.traefik.io/traefik/providers/kubernetes-ingress/).