k3s, traefik2 and ingress

Special thanks to just me and open source, specifically this video

# install k3s wihout traefik v1
curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="server --disable traefik" sh

# put this in a file /var/lib/rancher/k3s/server/manifests/traefik2.yaml
apiVersion: helm.cattle.io/v1
kind: HelmChart
  name: traefik
  namespace: kube-system
  chart: traefik
  repo: https://containous.github.io/traefik-helm-chart
    image.tag: "2.2"

# then reload k3s
systemctl restart k3s

# watch and you'll see it create traefik pods, deployment and a service
kubectl -n kube-system get all

# edit the traefik deployment to enable api.insecure
# this allows us to see the traefik v2 dashboard outside the cluster
# without accessing it through an ingress
kubectl -n kube-system edit deploy traefik

# add the following line in the appropriate spot
- --api.insecure=true

# you can reload the pod to re-read the config by scaling the deployment
# or you can simply delete the pod and let the replicaset start a new one
kubectl -n kube-system scale deploy traefik --replicas 0
kubectl -n kube-system scale deploy traefik --replicas 1
# or
kubectl -n kube-system delete pod traefikyyyyyyyyy-zzzzz

# edit the traefik service and add port 9000
kubectl -n kube-system edit service traefik
- name: traefik
 nodePort: 32323
 port: 9000
 protocol: TCP
 targetPort: traefik

# the traefik dashboard runs on port 8080 but only inside the cluster
# so you'll have to use port-forward to access it (unless you want to expose
# it outside of the cluster, we can talk about that later)
# once you complete the below command, open up http://localhost:8080 in a browser
# kubectl -n kube-system port-forward deployment/traefik 8080:9000

# create an ingress for traefik2 dashboard
apiVersion: extensions/v1beta1
kind: Ingress
  name: "traefik-dash-ingress"
  namespace: kube-system
    - host: traefik-dash.lab.pwned.com
          - backend:
              serviceName: traefik
              servicePort: 9000

# let's deploy nginx, expose it as a service, then create an ingress
kubectl create deploy nginx --image nginx

# verify you have an nginx deployment
kubectl get deploy -o wide

# expose the deployment
kubectl expose deploy nginx --port 80

# verify you have an nginx service
kubectl get service

# create a file for nginx ingress resource

apiVersion: extensions/v1beta1
kind: Ingress
  name: nginx
  - host: common.lab.pwned.com
  - http:
        - backend:
            serviceName: nginx
            servicePort: 80

kubectl create -f nginx-ingress.yaml

kubectl get ingress
kubectl describe ingress nginx

# backend IP should match nginx pod
kubectl get pods -o wide

# browse to any cluster IP
# should bring up nginx welcome page
# now browse back to the dashboard (make sure you're still port-forwarded)
# http://localhost:8080
# and you will see traefik populate a front-end and a back-end