Traefik & k3d: Dashboard is not reachable

Traefik Traefik v2
,
1

This is my k3d cluster creation command:

$ k3d cluster create arxius \
   --agents 3 \
   --k3s-server-arg --disable=traefik \
   -p "8888:80@loadbalancer" -p "9000:9000@loadbalancer" \
   --volume ${HOME}/.k3d/registries.yaml:/etc/rancher/k3s/registries.yaml

Here my nodes:

 CONTAINER ID        IMAGE                      COMMAND                  CREATED             STATUS              PORTS                                                                   NAMES
c83f2f746621        rancher/k3d-proxy:v3.0.1   "/bin/sh -c nginx-pr…"   2 weeks ago         Up 21 minutes       0.0.0.0:9000->9000/tcp, 0.0.0.0:8888->80/tcp, 0.0.0.0:45195->6443/tcp   k3d-arxius-serverlb
0ed525443da2        rancher/k3s:v1.18.6-k3s1   "/bin/k3s agent"         2 weeks ago         Up 21 minutes                                                                               k3d-arxius-agent-2
561a0a51e6d7        rancher/k3s:v1.18.6-k3s1   "/bin/k3s agent"         2 weeks ago         Up 21 minutes                                                                               k3d-arxius-agent-1
fc131df35105        rancher/k3s:v1.18.6-k3s1   "/bin/k3s agent"         2 weeks ago         Up 21 minutes                                                                               k3d-arxius-agent-0
4cfceabad5af        rancher/k3s:v1.18.6-k3s1   "/bin/k3s server --d…"   2 weeks ago         Up 21 minutes                                                                               k3d-arxius-server-0
873a4f157251        registry:2                 "/entrypoint.sh /etc…"   3 months ago        Up About an hour    0.0.0.0:5000->5000/tcp                                                  registry.localhost

I've installed traefik using default helm installation command:

$ helm install traefik traefik/traefik

After that, an ingressroute is also installed in order to reach dashboard:

Name:         traefik-dashboard
Namespace:    traefik
Labels:       app.kubernetes.io/instance=traefik
              app.kubernetes.io/managed-by=Helm
              app.kubernetes.io/name=traefik
              helm.sh/chart=traefik-9.1.1
Annotations:  helm.sh/hook: post-install,post-upgrade
API Version:  traefik.containo.us/v1alpha1
Kind:         IngressRoute
Metadata:
  Creation Timestamp:  2020-12-09T19:07:41Z
  Generation:          1
  Managed Fields:
    API Version:  traefik.containo.us/v1alpha1
    Fields Type:  FieldsV1
    fieldsV1:
      f:metadata:
        f:annotations:
          .:
          f:helm.sh/hook:
        f:labels:
          .:
          f:app.kubernetes.io/instance:
          f:app.kubernetes.io/managed-by:
          f:app.kubernetes.io/name:
          f:helm.sh/chart:
      f:spec:
        .:
        f:entryPoints:
        f:routes:
    Manager:         Go-http-client
    Operation:       Update
    Time:            2020-12-09T19:07:41Z
  Resource Version:  141805
  Self Link:         /apis/traefik.containo.us/v1alpha1/namespaces/traefik/ingressroutes/traefik-dashboard
  UID:               1cbcd5ec-d967-440c-ad21-e41a59ca1ba8
Spec:
  Entry Points:
    traefik
  Routes:
    Kind:   Rule
    Match:  PathPrefix(`/dashboard`) || PathPrefix(`/api`)
    Services:
      Kind:  TraefikService
      Name:  api@internal
Events:      <none>

As you can see:

Match:  PathPrefix(`/dashboard`) || PathPrefix(`/api`)

I'm trying to reach dashboard. Nevertheless:

enter image description here

Details are not shown.

I've also tried to launch a curl command:

curl 'http://localhost:9000/api/overview'
curl: (52) Empty reply from server

Any ideas?

2

UP

Same here using k3s.
Installed with :

curl -sfL https://get.k3s.io | sh -s - --write-kubeconfig-mode 644

I apply the following service for the UI port :

---
apiVersion: v1
kind: Service
metadata:
  name: traefik-dashboard-svc
  namespace: kube-system
  labels:
    app.kubernetes.io/name: traefik
spec:
  selector:
    app.kubernetes.io/name: traefik
  ports:
    - protocol: TCP
      port: 80
      targetPort: 9000

Using a port-forward command kubectl -n kube-system port-forward svc/traefik-dashboard-svc 8080:80 the dashboard works as expected.

But if I create the following ingress to this service (traefik class):

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: traefik-dashboard-ing
  namespace: kube-system
  annotations:
    kubernetes.io/ingress.class: "traefik"
spec:
  rules:
  - http:
      paths:
      - path: /dashboard
        pathType: Prefix                                                                                                                                                            
        backend:
          service:
            name: traefik-dashboard-svc
            port:
              number: 80

All i get is an empty dashboard on http://localhost/dashboard/ like @jeusdi :

Screenshot_2022-01-20_16-24-19
Screenshot_2022-01-20_16-24-191277×913 20.8 KB

Anyone ?

3

Your issue comes from your ingress. You should have two paths, one for the dashboard, and one for the API

4

And this is written in the documentation. I'm sorry for that.
It works perfectly now !
Thank you for the quick answer.

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