Ingress configuration for k8s in different namespaces

by

I would like to simplify the answer a bit for those who are relatively new to Kubernetes and its ingress options. There are 2 separate things that need to be present for ingress(es) to work:

  1. Ingress Controller: a separate DaemonSet (a controller which runs on all nodes, including any future ones) along with a Service that can be used to utilize routing and proxying. It’s based for example on NGINX which acts as the old-school reverse proxy receiving incoming traffic and forwarding it to HTTP(S) routes defined in the Ingress resources in point 2 below (distinguished by their different routes/URLs);
  2. Ingress rules: separate Kubernetes resources with kind: Ingress. Will only take effect if Ingress Controller is already deployed on that node.

While Ingress Controller can be deployed in any namespace it is usually deployed in a namespace separate from your app services (e.g. ingress or kube-system). It can see Ingress rules in all other namespaces and pick them up. However, each of the Ingress rules must reside in the namespace where the app that they configure reside.

There are some workarounds for that, but this is the most common approach.

More Related Contents:

  1. Nginx Ingress Controller – Failed Calling Webhook
  2. 413 error with Kubernetes and Nginx ingress controller
  3. Ingress vs Load Balancer
  4. Kubernetes Cross Namespace Ingress Network
  5. Can I set custom ports for a Kubernetes ingress to listen on besides 80 / 443?
  6. Kubernetes: Routing non HTTP Request via Ingress to Container
  7. pod has unbound PersistentVolumeClaims
  8. How do I access the Kubernetes api from within a pod container?
  9. How kubectl port-forward works?
  10. What’s the best way to share/mount one file into a pod?
  11. Restart pods when configmap updates in Kubernetes?
  12. How to force SSL for Kubernetes Ingress on GKE
  13. How can I edit a Deployment without modify the file manually?
  14. Connect to local database from inside minikube cluster
  15. Inject node labels into Kubernetes pod
  16. Checking kubernetes pod CPU and memory
  17. Minikube expose MySQL running on localhost as service
  18. Allow scheduling of pods on Kubernetes master?
  19. How to assign a namespace to certain nodes?
  20. Does kubectl port-forward ignore loadBalance services?
  21. How to rolling restart pods without changing deployment yaml in kubernetes?
  22. How to schedule pods restart
  23. Kubernetes ConfigMap size limitation
  24. What is the difference between a pod and a deployment?
  25. Restart container within pod
  26. How to get Kubernetes cluster name from K8s API
  27. How do I set ulimit for containers in Kubernetes?
  28. Is there a way to add arbitrary records to kube-dns?
  29. How to Enable KubeAPI server for HPA Autoscaling Metrics
  30. How to know a Pod’s own IP address from inside a container in the Pod?

Leave a Comment