Rancher 2.0 and Traefik

Rancher 1.x
1

Hi everybody,

First of all I wish to warn you that I am not a Kubernetes, Rancher or english expert, please take this into account if my question does not seem very relevant to you.

I am trying to use Rancher 2.0 and Traefik on a clean infrastructure composed by:

  • 1 VPS with Ubuntu 16.04, Docker and Rancher only
  • A cluster created with Rancher :
    ** 3 etcd and controlplane servers
    ** 3 workers with one dedicated to be a load balancer with Traefik running on it
    ** 1 nfs server

With Rancher 1.6. Traefik was running well, delivered Let’s Encrypt certificates to my containers properly based upon frontend rules, I was pretty happy.

With Rancher 2.0, I managed to make Traefik ran on the appropriate node with some difficulties (I did not find what to enter for the “nodeSelector” parameter so I set it afterwards in Rancher…).

I did a simple test. I tried to run nginx and add labels like I did with Rancher 1.6:

  • traefik.enable = true
  • traefik.port = 80
  • traefik.frontend.rule = Host:some.site.com

The frontend rule is not accepted in Rancher due to restrictions about the format. I think it is related to Kubernetes but I did not find the answer on the web.

If somebody can give me some information, links or documentation about this I will appreciate. I am a little bit lost with the Traefik documentation. It is difficult for me to link the Traefik documentation with the Rancher web UI…

Thanks for help!

2

Labels can only contain very specific characters. Træfik uses annotations.

3

Hi Vincent,

Sorry for this late answer.
I used annotations like you suggested but I am facing another issue related to my deployment I think.

As mentioned in the Traefik notes, it looks like this Traefik helm only works on AWS or GKE which is not my case. I tried to force an external IP in my config but Traefik stays “pending”.

I will try something else, at least cert-manager to have Let’s Encrypt certificate at least.
Thanks for your help

4

Hi,

I use Traefik (from Helm) as an Ingress Controller. Everything works like a charm. But did you find a way to use nodeSelector parameter ? I configure it later but I wanted to know how to do this.

Thanks