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kubernetestraefikkubernetes-ingresstraefik-ingress

kubernetes expose services with Traefik 2.x as ingress with CRD

What i have

I have a Kubernetes cluster as follow:

  • Single control plane (but plan to extend to 3 control plane for HA)
  • 2 worker nodes



On this cluster i deployed (following this doc from traefik https://docs.traefik.io/user-guides/crd-acme/):

  • A deployment that create two pods :

    • traefik itself: which will be in charge of routing with exposed port 80, 8080
    • whoami:a simple http server thats responds to http requests

  • two services

    • traefik service:
    • whoami servic:

  • One traefik IngressRoute:

What i want

I have multiple services running in the cluster and i want to expose them to the outside using Ingress. More precisely i want to use the new Traefik 2.x CDR ingress methods.

My ultimate goal is to use new traefiks 2.x CRD to expose resources on port 80, 443, 8080 using IngressRoute Custom resource definitions

What's the problem

If i understand well, classic Ingress controllers allow exposition of every ports we want to the outside world (including 80, 8080 and 443).

But with the new traefik CDR ingress approach on it's own it does not exports anything at all. One solution is to define the Traefik service as a loadbalancer typed service and then expose some ports. But you are forced to use the 30000-32767 ports range (same as nodeport), and i don't want to add a reverse proxy in front of the reverse proxy to be able to expose port 80 and 443...

Also i've seed from the doc of the new igress CRD (https://docs.traefik.io/user-guides/crd-acme/) that:

kubectl port-forward --address 0.0.0.0 service/traefik 8000:8000 8080:8080 443:4443 -n default

is required, and i understand that now. You need to map the host port to the service port. But mapping the ports that way feels clunky and counter intuitive. I don't want to have a part of the service description in a yaml and at the same time have to remember that i need to map port with kubectl.

I'm pretty sure there is a neat and simple solution to this problem, but i can't understand how to keep things simple. Do you guys have an experience in kubernetes with the new traefik 2.x CRD config?

Solution

  • Well after some time i've decided to put an haproxy in front of the kubernetes Cluster. It's seems to be the only solution ATM.