Ingress

Make sure you are in the correct namespace.

Enable Ingress Controller

In case of using minikube you need to enable NGNIX Ingress controller.

minikube addons enable ingress -p devnation

Wait a minute or so and verify that it has been deployed correctly:

kubectl get pods -n ingress-nginx
ingress-nginx-admission-create-lqfh2        0/1     Completed   0          6m28s
ingress-nginx-admission-patch-z2lzj         0/1     Completed   2          6m28s
ingress-nginx-controller-69ccf5d9d8-95xgp   1/1     Running     0          6m28s

Deploy Application

cat <<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: Deployment
metadata:
  name: quarkus-demo-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: quarkus-demo
  template:
    metadata:
      labels:
        app: quarkus-demo
        env: dev
    spec:
      containers:
      - name: quarkus-demo
        image: quay.io/rhdevelopers/quarkus-demo:v1
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
EOF

Expose the service:

kubectl expose deployment quarkus-demo-deployment --type=NodePort --port=8080
kubectl get service quarkus-demo-deployment
NAME                      TYPE       CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
quarkus-demo-deployment   NodePort   10.105.106.66   <none>        8080:30408/TCP   11s

  • Minikube

  • Hosted

IP=$(minikube ip -p devnation)
PORT=$(kubectl get service/quarkus-demo-deployment -o jsonpath="{.spec.ports[*].nodePort}")

If using a hosted Kubernetes cluster like OpenShift then use curl and the EXTERNAL-IP address with port 8080 or get it using kubectl:

IP=$(kubectl get service quarkus-demo-deployment -o jsonpath="{.status.loadBalancer.ingress[0].ip}")
PORT=$(kubectl get service quarkus-demo-deployment -o jsonpath="{.spec.ports[*].port}")
If you are in AWS, you need to get the hostname instead of ip. 
IP=$(kubectl get service quarkus-demo-deployment -o jsonpath="{.status.loadBalancer.ingress[0].hostname}")

Curl the Service:

curl $IP:$PORT

Configuring Ingress

An Ingress resource is defined as:

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  rules:
  - host: kube-devnation.info
    http:
      paths:
      - pathType: Prefix
        path: /
        backend:
          service:
            name: quarkus-demo-deployment
            port:
              number: 8080
kubectl apply -f apps/kubefiles/demo-ingress.yaml

Get the information from the Ingress resource:

kubectl get ingress
NAME              CLASS    HOSTS                 ADDRESS          PORTS   AGE
example-ingress   <none>   kube-devnation.info   192.168.99.115   80      68s

You need to wait until address field is set. It might take some minutes.

Modify the /etc/hosts to point the hostname to the Ingress address.

If you are using minikube, use the minikube ip -p kube as address because the Ingress IP is an internal IP.
/etc/hosts
172.17.0.15 kube-devnation.info
curl kube-devnation.info
Supersonic Subatomic Java with Quarkus quarkus-demo-deployment-8cf45f5c8-qmzwl:1

Second Deployment

Deploy a second version of the service:

cat <<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mynode-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mynode
  template:
    metadata:
      labels:
        app: mynode
    spec:
      containers:
      - name: mynode
        image: quay.io/rhdevelopers/mynode:v1
        ports:
        - containerPort: 8000
EOF
kubectl expose deployment mynode-deployment --type=NodePort --port=8000

Ingress Update

Then you need to update the Ingress resource with the new path:

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: example-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  rules:
  - host: kube-devnation.info
    http:
      paths:
      - path: /
        backend:
          serviceName: quarkus-demo-deployment
          servicePort: 8080
      - path: /v2
        backend:
          serviceName: mynode-deployment
          servicePort: 8000
kubectl apply -f apps/kubefiles/demo-ingress-2.yaml

Test it:

curl kube-devnation.info
Supersonic Subatomic Java with Quarkus quarkus-demo-deployment-8cf45f5c8-qmzwl:2
curl kube-devnation.info/v2
Node Bonjour on mynode-deployment-77c7bf857d-5nfl4 0

Clean Up

kubectl delete deployment mynode-deployment
kubectl delete service mynode-deployment

kubectl delete deployment quarkus-demo-deployment
kubectl delete service quarkus-demo-deployment

kubectl delete -f apps/kubefiles/demo-ingress-2.yaml