Kubernetes Traefik Installation (helm)

Posted on Friday January 18, 2019

Introduction

In this article we will learn how to to setup traefik in kubernetes cluster using helm

Helm: Helm is a tool for managing Kubernetes charts. Charts are packages of pre-configured Kubernetes resources.

Let's Begin deploying traefik using helm in traefik , if you are new to helm then download and initialize helm as follows

[email protected]:#  helm init
[email protected]:# kubectl create serviceaccount --namespace kube-system tiller
[email protected]:# kubectl create clusterrolebinding tiller-cluster-rule \
   --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
[email protected]:#  kubectl patch deploy --namespace kube-system tiller-deploy \
   -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'

Make sure the title-deploy pod is up and running

[email protected]:/home/ansible# kubectl get pods -n kube-system 
NAME                                  READY     STATUS    RESTARTS   AGE
coredns-78fcdf6894-jvmlb              1/1       Running   0          1h
coredns-78fcdf6894-xstbn              1/1       Running   0          1h
etcd-kube-master                      1/1       Running   0          1h
kube-apiserver-kube-master            1/1       Running   0          1h
kube-controller-manager-kube-master   1/1       Running   0          1h
kube-flannel-ds-5gzn9                 1/1       Running   0          1h
kube-flannel-ds-tlc8j                 1/1       Running   0          1h
kube-proxy-kl4fg                      1/1       Running   0          1h
kube-proxy-krt6n                      1/1       Running   0          1h
kube-scheduler-kube-master            1/1       Running   0          1h
tiller-deploy-85744d9bfb-wh98g        1/1       Running   0          1h

Once titler pod is up and running, traefik Installation starts here, this is done through helm the kubernetes package manager,

About traefik

Traefik is a modern HTTP reverse proxy and load balancer made to deploy microservices with ease.

In the below command line, we enabled the dashboard (dashboard.enabled=true) and made it available on http://dashboard.traefik (dashboard.domain=dashboard.traefik). Since the installation is performed in barematel set the serviceType=NodePort, you ignore this field if you have load-balancer enabled, we tell the helm to setup the cluster role binding by setting rbac.enabled=true
The traefik ingress is installed in the kube-system namespace

helm install stable/traefik --name traefik --set dashboard.enabled=true,serviceType=NodePort,dashboard.domain=dashboard.traefik,rbac.enabled=true  --namespace kube-system

NAME:   traefik
LAST DEPLOYED: Fri Jan 18 10:20:11 2019
NAMESPACE: kube-system
STATUS: DEPLOYED

RESOURCES:
==> v1/ServiceAccount
NAME     SECRETS  AGE
traefik  1        3s

==> v1/ClusterRole
NAME     AGE
traefik  3s

==> v1/ClusterRoleBinding
NAME     AGE
traefik  3s

==> v1/Service
NAME               TYPE       CLUSTER-IP      EXTERNAL-IP  PORT(S)                     AGE
traefik-dashboard  ClusterIP  10.111.208.113  <none>       80/TCP                      3s
traefik            NodePort   10.106.144.153  <none>       80:31622/TCP,443:31703/TCP  2s

==> v1/Deployment
NAME     DESIRED  CURRENT  UP-TO-DATE  AVAILABLE  AGE
traefik  1        1        1           0          2s

==> v1beta1/Ingress
NAME               HOSTS              ADDRESS  PORTS  AGE
traefik-dashboard  dashboard.traefik  80       2s

==> v1/Pod(related)
NAME                     READY  STATUS             RESTARTS  AGE
traefik-8dc967bf9-89cb2  0/1    ContainerCreating  0         2s

==> v1/ConfigMap
NAME     DATA  AGE
traefik  1     3s

NOTES:

1. Traefik has been started. You can find out the port numbers being used by traefik by running:

          $ kubectl describe svc traefik --namespace kube-system

2. Configure DNS records corresponding to Kubernetes ingress resources to point to the NODE_IP/NODE_HOST

View the cluster role

[email protected]:# kubectl describe clusterrole traefik
Name:         traefik
Labels:       <none>
Annotations:  <none>
PolicyRule:
  Resources                    Non-Resource URLs  Resource Names  Verbs
  ---------                    -----------------  --------------  -----
  endpoints                    []                 []              [get list watch]
  pods                         []                 []              [get list watch]
  secrets                      []                 []              [get list watch]
  services                     []                 []              [get list watch]
  ingresses.extensions         []                 []              [get list watch]
  ingresses.extensions/status  []                 []              [update]

Check the traefik pods are running in the kube-system namespace

[email protected]:/home/ansible# kubectl get pods  -n kube-system | grep traefik
traefik-8dc967bf9-89cb2               1/1       Running   0          17m

Traefik has been started. You can find out the port numbers being used by traefik by running:

[email protected]:# kubectl describe svc traefik --namespace kube-system
Name:                     traefik
Namespace:                kube-system
Labels:                   app=traefik
                          chart=traefik-1.58.0
                          heritage=Tiller
                          release=traefik
Annotations:              <none>
Selector:                 app=traefik,release=traefik
Type:                     NodePort
IP:                       10.106.144.153
Port:                     http  80/TCP
TargetPort:               http/TCP
NodePort:                 http  31622/TCP
Endpoints:                10.244.1.81:80
Port:                     https  443/TCP
TargetPort:               httpn/TCP
NodePort:                 https  31703/TCP
Endpoints:                10.244.1.81:8880
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

View the helm chart deployment

[email protected]:# helm ls 
NAME    REVISION  UPDATED                   STATUS    CHART           APP VERSION NAMESPACE  
traefik 1         Fri Jan 18 10:20:11 2019  DEPLOYED  traefik-1.58.0  1.7.6       kube-system

Open the web browser and browse Node port http://dashboard.traefik:31622/ to access Traefik page

Note: The installed traefik is over http and there is no form of Authentication, in order to provide the basic authentication
To configure BASIC AUTH Use htpasswd to create a file containing the username and the MD5-encoded password:

[email protected]:# htpasswd -c traefik traefik
New password: <<traefik>>
Re-type new password:<<traefik>>

Deploy traefik with dashboard.auth.basic Enabled

[email protected]:# helm install stable/traefik --name traefik --set dashboard.enabled=true,serviceType=NodePort,dashboard.domain=dashboard.traefik,rbac.enabled=true,dashboard.auth.basic.traefik='$apr1$vUmd7ddA$CoklUZpHBbRzvnZUz6eFY.' --namespace kube-system

Open the web browser and browse Node port http://dashboard.traefik:<NODE_PORT>/ to access Traefik page
Give username and password as traefik:traefik
Enable SSL, this can be done through by setting the ssl.enabled=true
Deploy traefik with BASIC AUTH and SSL Enabled

[email protected]:# helm install stable/traefik --name traefik --set dashboard.enabled=true,serviceType=NodePort,dashboard.domain=dashboard.traefik,rbac.enabled=true,dashboard.auth.basic.traefik='$apr1$vUmd7ddA$CoklUZpHBbRzvnZUz6eFY.',ssl.enabled=true,ssl.enforced=true --namespace kube-system

Open the web browser and browse secure Node port https://dashboard.traefik:<NODE_PORT>/ to access Traefik page securely
To learn more about helm traefik chart go here

Thanks Happy Helming, do poke me for any problems

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