1. Deploy Native Application to Kubernetes (Minikube)

1.1. Create a new Project

create-quarkus-kubernetes.sh
mvn io.quarkus:quarkus-maven-plugin:2.16.4.Final:create \
 -DprojectGroupId=at.htl \
 -DprojectArtifactId=quarkus-kubernetes \
 -DclassName="at.htl.WeatherResource" \
 -Dpath="/weather" \
 -Dextensions="kubernetes, docker"
chmod +x create-quarkus-kubernetes.sh
./create-quarkus-kubernetes.sh

1.2. Start minikube

minikube start
minikube start

k8s minikube start

There is minikube in the Docker menu. (MacUser can also use home brew) 
docker ps
terminal output
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
8fed5e8cff30        registry:2          "/entrypoint.sh /etc…"   39 hours ago        Up 39 hours         0.0.0.0:5000->5000/tcp   registry

Now we will change the context of docker to minikube. When you close the shell, you are back to your "normal" docker.

This are the kubernetes images
eval $(minikube docker-env)

k8s minikube docker ps

1.3. Package the App

cd quarkus-kubernetes
./mvnw clean package
target/kubernetes/kubernetes.yml
---
apiVersion: v1
kind: ServiceAccount
metadata:
  annotations:
    app.quarkus.io/vcs-url: https://github.com/htl-leonding-college/quarkus-lecture-notes.git
    app.quarkus.io/build-timestamp: 2020-09-02 - 10:48:37 +0000
    app.quarkus.io/commit-id: 7d68d95df5a5d5499903639c6dfc92e0e5486be7
  labels:
    app.kubernetes.io/name: quarkus-kubernetes
    app.kubernetes.io/version: 1.0-SNAPSHOT
  name: quarkus-kubernetes
---
apiVersion: v1
kind: Service
metadata:
  annotations:
    app.quarkus.io/vcs-url: https://github.com/htl-leonding-college/quarkus-lecture-notes.git
    app.quarkus.io/build-timestamp: 2020-09-02 - 10:48:37 +0000
    app.quarkus.io/commit-id: 7d68d95df5a5d5499903639c6dfc92e0e5486be7
  labels:
    app.kubernetes.io/name: quarkus-kubernetes
    app.kubernetes.io/version: 1.0-SNAPSHOT
  name: quarkus-kubernetes
spec:
  ports:
  - name: http
    port: 8080
    targetPort: 8080
  selector:
    app.kubernetes.io/name: quarkus-kubernetes
    app.kubernetes.io/version: 1.0-SNAPSHOT
  type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
  annotations:
    app.quarkus.io/vcs-url: https://github.com/htl-leonding-college/quarkus-lecture-notes.git
    app.quarkus.io/build-timestamp: 2020-09-02 - 10:48:37 +0000
    app.quarkus.io/commit-id: 7d68d95df5a5d5499903639c6dfc92e0e5486be7
  labels:
    app.kubernetes.io/name: quarkus-kubernetes
    app.kubernetes.io/version: 1.0-SNAPSHOT
  name: quarkus-kubernetes
spec:
  replicas: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: quarkus-kubernetes
      app.kubernetes.io/version: 1.0-SNAPSHOT
  template:
    metadata:
      annotations:
        app.quarkus.io/vcs-url: https://github.com/htl-leonding-college/quarkus-lecture-notes.git
        app.quarkus.io/build-timestamp: 2020-09-02 - 10:48:37 +0000
        app.quarkus.io/commit-id: 7d68d95df5a5d5499903639c6dfc92e0e5486be7
      labels:
        app.kubernetes.io/name: quarkus-kubernetes
        app.kubernetes.io/version: 1.0-SNAPSHOT
    spec:
      containers:
      - env:
        - name: KUBERNETES_NAMESPACE
          valueFrom:
            fieldRef:
              fieldPath: metadata.namespace
        image: stuetz/quarkus-kubernetes:1.0-SNAPSHOT
        imagePullPolicy: IfNotPresent
        name: quarkus-kubernetes
        ports:
        - containerPort: 8080
          name: http
          protocol: TCP
      serviceAccount: quarkus-kubernetes
src/main/resources/application.properties
quarkus.kubernetes.image-pull-policy=ifNotPresent (1)
quarkus.kubernetes.service-type=LoadBalancer (2)
1 The image will not pulled to the docker registry, when already existing
2 the options for the service type are

  1. NodePort

  2. LoadBalancer

  3. Ingress is not intended to use

Kubernetes NodePort vs LoadBalancer vs Ingress? When should I use what?

1.4. Deploy the App

./mvnw clean package -Dquarkus.kubernetes.deploy=true
...
[INFO] [io.quarkus.kubernetes.deployment.KubernetesDeployer] Deploying to kubernetes server: https://192.168.64.2:8443/ in namespace: default.
[INFO] [io.quarkus.kubernetes.deployment.KubernetesDeployer] Applied: ServiceAccount quarkus-kubernetes.
[INFO] [io.quarkus.kubernetes.deployment.KubernetesDeployer] Applied: Service quarkus-kubernetes.
[INFO] [io.quarkus.kubernetes.deployment.KubernetesDeployer] Applied: Deployment quarkus-kubernetes.
[INFO] [io.quarkus.deployment.QuarkusAugmentor] Quarkus augmentation completed in 103962ms
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  01:51 min
[INFO] Finished at: 2020-09-02T17:26:16+02:00
[INFO] ------------------------------------------------------------------------
view pods
kubectl get pods
NAME                                  READY   STATUS    RESTARTS   AGE
quarkus-kubernetes-678d45d8f9-sbdkh   1/1     Running   0          5m47s
view services
kubectl get svc
NAME                 TYPE           CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
kubernetes           ClusterIP      10.96.0.1      <none>        443/TCP          93d
quarkus-kubernetes   LoadBalancer   10.98.231.29   <pending>     8080:31532/TCP   8m21s

k8s intellij service window

view services
kubectl get all
NAME                                      READY   STATUS    RESTARTS   AGE
pod/quarkus-kubernetes-678d45d8f9-sbdkh   1/1     Running   0          9m42s

NAME                         TYPE           CLUSTER-IP     EXTERNAL-IP   PORT(S)          AGE
service/kubernetes           ClusterIP      10.96.0.1      <none>        443/TCP          93d
service/quarkus-kubernetes   LoadBalancer   10.98.231.29   <pending>     8080:31532/TCP   12m

NAME                                 READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/quarkus-kubernetes   1/1     1            1           12m

NAME                                            DESIRED   CURRENT   READY   AGE
replicaset.apps/quarkus-kubernetes-5c6c7cf987   0         0         0       12m
replicaset.apps/quarkus-kubernetes-678d45d8f9   1         1         1       9m42s
open service in browser
minikube service quarkus-kubernetes
|-----------|--------------------|-------------|---------------------------|
| NAMESPACE |        NAME        | TARGET PORT |            URL            |
|-----------|--------------------|-------------|---------------------------|
| default   | quarkus-kubernetes | http/8080   | http://192.168.64.2:31532 |
|-----------|--------------------|-------------|---------------------------|
🎉  Opening service default/quarkus-kubernetes in default browser...
view service-url
minikube service quarkus-kubernetes --url
http://192.168.64.2:31532

k8s minikube service

k8s minikube service url