Troubleshooting k3s

Kubernetes dashboard

In case you want to see more about what’s happening in the cluster, you can run the k8s dashboard as follows (source):

GITHUB_URL=https://github.com/kubernetes/dashboard/releases
VERSION_KUBE_DASHBOARD=$(curl -w '%{url_effective}' -I -L -s -S ${GITHUB_URL}/latest -o /dev/null | sed -e 's|.*/||')
kubectl create -f https://raw.githubusercontent.com/kubernetes/dashboard/${VERSION_KUBE_DASHBOARD}/aio/deploy/recommended.yaml

Then, create dashboard.admin-user.yml and dashboard.admin-user-role.yml with the content specified here.

Lastly, run:

kubectl create -f dashboard.admin-user.yml -f dashboard.admin-user-role.yml
kubectl -n kubernetes-dashboard describe secret admin-user-token | grep ^token
kubectl proxy

You can now open the k8s dashboard at http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/ and sign in with user admin-user and as password the token grepped in the previous step.

Traefik dashboard

To troubleshoot traefik, it’s sometimes easiest to view the traefik dashboard.

For that, do the following:

Run kubectl -n kube-system edit configmap traefik, then add:

[api]
      dashboard = true

Then run a proxy (kubectl -n kube-system port-forward deployment/traefik 8080) and open http://localhost:8080 to load the traefik dashboard.