This project demonstrates deploying a Quarkus-based Vert.x application to Google Kubernetes Engine (GKE).

• Operating System: macOS 13.2.1 (Build 22D68)

• Quarkus: A Kubernetes-native Java framework designed for fast startup and low memory footprint.
• Minikube: A tool to run a single-node Kubernetes cluster locally for development and testing.
• Google Kubernetes Engine (GKE): A managed Kubernetes service provided by Google Cloud Platform (GCP).
• Jib: A container image building tool that simplifies packaging Java applications into container images without needing a Dockerfile.

• Configure Kubernetes node port and Spotify credentials in application.properties file as follows:

%prod.host={minikube_ip}
%prod.port={service_port}
quarkus.kubernetes.node-port={port}
...
spotify.client-id={SPOTIFY_APP_CLIENT_ID}
spotify.client-secret={SPOTIFY_APP_CLIENT_SECRET}

• Ensure Minikube is installed and initialized as VM, with the driver of qemu:

minikube start --driver qemu --network socket_vmnet

Minikube virtual machine driver installation: https://minikube.sigs.k8s.io/docs/drivers/qemu/

Configure the local Docker client to use the Docker daemon running inside Minikube:

eval $(minikube docker-env)

Generate Kubernetes Secret to initialize the database server and grant access:

kubectl create secret generic db-credentials --from-literal=username={USERNAME} --from-literal=password={PASSWORD}
kubectl apply -f postgresql_kubernetes.yml
kubectl apply -f mongodb_kubernetes.yml  

Build and deploy the application to Minikube with ARM64 platform support:

mvn clean package -Dquarkus.container-image.build=true \
    -Dquarkus.jib.platforms=linux/arm64/v8 \
    -Dquarkus.kubernetes.deploy=true

Make a request to the deployed service to ensure successful deployment:

http {minikube_ip}:{service_port}/api/person \
  Content-Type:application/json \
  name="John Doe" \
  age:=30

http {minikube_ip}:{service_port}/api/people   

Initialize and configure the Google Cloud SDK for authentication:

gcloud auth login
gcloud init

Configure Docker authentication information to interact with Google Artifact Registry for Docker:

gcloud auth configure-docker

Build and push the container image to Google Container Registry using Jib:

mvn clean package -Dquarkus.container-image.build=true \
    -Dquarkus.container-image.push=true \
    -Dquarkus.jib.platforms=linux/arm64/v8

Create a Kubernetes cluster on Google Kubernetes Engine:

Connect your terminal to the generated Kubernetes cluster on GKE:

gcloud container clusters get-credentials {YOUR_CLUSTER_NAME} --region {YOUR_REGION} --project {YOUR_PROJECT_ID}

Deploy the Quarkus application to the GKE cluster:

mvn clean package -Dquarkus.kubernetes.deploy=true