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18.Ingress-Controller-using-NGINX.md

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Ingress Controller Using NGINX

  • Deploy Ingress controller and default backend.
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/mandatory.yaml
  • Verify ingress controller Pod started or not
kubectl get all -n ingress-nginx
  • Output
NAME                                            READY   STATUS    RESTARTS   AGE
pod/nginx-ingress-controller-5bffb7dd4d-58vpp   1/1     Running   0          6m34s

NAME                    TYPE           CLUSTER-IP     EXTERNAL-IP     PORT(S)                      AGE
service/ingress-nginx   LoadBalancer   172.168.6.87   192.168.31.51   80:31892/TCP,443:31951/TCP   4m34s

NAME                                       DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/nginx-ingress-controller   1         1         1            1           6m34s

NAME                                                  DESIRED   CURRENT   READY   AGE
replicaset.apps/nginx-ingress-controller-5bffb7dd4d   1         1         1       6m34s
  • Verify NGINX ingress version
POD_NAMESPACE=ingress-nginx
POD_NAME=$(kubectl get pods -n $POD_NAMESPACE -l app.kubernetes.io/name=ingress-nginx -o jsonpath='{.items[0].metadata.name}')
kubectl exec -it $POD_NAME -n $POD_NAMESPACE -- /nginx-ingress-controller --version
  • Output
-------------------------------------------------------------------------------
NGINX Ingress controller
  Release:    0.19.0
  Build:      git-05025d6
  Repository: https://github.com/kubernetes/ingress-nginx.git
-------------------------------------------------------------------------------
  • Create ingress-nginx service
vi ingress-nginx.yaml

kind: Service
apiVersion: v1
metadata:
  name: ingress-nginx
  namespace: ingress-nginx
  labels:
    app.kubernetes.io/name: ingress-nginx
    app.kubernetes.io/part-of: ingress-nginx
spec:
  externalTrafficPolicy: Local
  type: LoadBalancer
  selector:
    app.kubernetes.io/name: ingress-nginx
  ports:
  - name: http
    port: 80
    targetPort: http
  - name: https
    port: 443
    targetPort: https
  • Create Ingress Service
kubectl create -f ingress-nginx.yaml
  • Verify ingress service
kubectl get svc -n ingress-nginx
  • Output
NAME                   TYPE           CLUSTER-IP        EXTERNAL-IP     PORT(S)                      AGE
ingress-nginx          LoadBalancer   172.168.34.173    192.168.78.51   80:31709/TCP,443:32254/TCP   39s

Deploy coffee and tea application and configure ingress to access it with same hostname

  • Set environments
IC_IP=192.168.78.51
IC_HTTPS_PORT=443
  • Create ingress
kubectl create -f https://raw.githubusercontent.com/nginxinc/kubernetes-ingress/master/examples/complete-example/cafe-ingress.yaml
  • Deploy application pods
kubectl create -f  https://raw.githubusercontent.com/nginxinc/kubernetes-ingress/master/examples/complete-example/cafe.yaml
  • Deploy certificates and key for HTTPS access
kubectl create -f  https://raw.githubusercontent.com/nginxinc/kubernetes-ingress/master/examples/complete-example/cafe-secret.yaml
  • Wait for few minites and make sure you got ADDRESS field populated in ingress
kubectl get ingresses.extensions
  • Output
NAME           HOSTS              ADDRESS         PORTS     AGE
cafe-ingress   cafe.example.com   192.168.78.51   80, 443   2m21s
  • Test coffee app
curl --resolve cafe.example.com:$IC_HTTPS_PORT:$IC_IP https://cafe.example.com:$IC_HTTPS_PORT/coffee --insecure
  • Output
Server address: 10.10.2.25:80
Server name: coffee-56668d6f78-mdghx
Date: 04/Oct/2018:15:20:50 +0000
URI: /coffee
  • Test tea app
curl --resolve cafe.example.com:$IC_HTTPS_PORT:$IC_IP https://cafe.example.com:$IC_HTTPS_PORT/tea --insecure
  • Output
Server address: 10.10.1.23:80
Server name: tea-85f8bf86fd-49tp4
Date: 04/Oct/2018:15:20:58 +0000
URI: /tea
Request ID: 535dc70dab7f31c3d22b317d4570a289
  • You may also add entries in Host file (/etc/hosts in Linux and C:\Windows\System32\drivers\etc\hosts for windows )
192.168.78.51 cafe.example.com
  • Now you can use your browser to access the application

Ingress sample output