[https://medium.com/javarevisited/kubernetes-step-by-step-with-spring-boot-docker-gke-35e9481f6d5f]

Deployment on Google Cloud

• Cloud Shell
  export PROJECT_ID=$(gcloud config get-value project -q)

Docker Commands

• Datareader
  git clone https://saliabbasraza:<password>@github.com/saliabbasraza/spring-datareader.git
cd spring-datareader/
./mvnw clean package
docker build -t gcr.io/${PROJECT_ID}/spring-datareader .
docker push gcr.io/${PROJECT_ID}/spring-datareader

• UserApi
  git clone https://saliabbasraza:<password>@github.com/saliabbasraza/spring-user-api.git
cd spring-user-api/
./mvnw clean package
docker build -t gcr.io/${PROJECT_ID}/spring-user-api .
docker push gcr.io/${PROJECT_ID}/spring-user-api

Kubernetes Commands

gcloud container clusters create k8s-medium --num-nodes=3 --zone=us-central1-b
kubectl run dataserver --image=gcr.io/${PROJECT_ID}/spring-datareader:latest --port 8080 --labels="app=spring-datareader,tier=backend"
kubectl run userapi --image=gcr.io/${PROJECT_ID}/spring-user-api:latest --port 8080 --labels="app=spring-user-api,tier=frontend"
kubectl expose deployment userapi --type=LoadBalancer --port 80 --target-port 8080
kubectl expose deployment dataserver --type=ClusterIP --port 80 --target-port 8080 --selector="app=spring-datareader,tier=backend"

Redeploy

####Local Docker kubectl rollout restart deployment userapi kubectl rollout restart deployment dataserver

####Google Cloud

• Datareader
  cd spring-datareader/
./mvnw clean package
docker build -t gcr.io/${PROJECT_ID}/spring-datareader:0.2 .
docker push gcr.io/${PROJECT_ID}/spring-datareader:0.2
kubectl set image deployment/dataserver userapi=gcr.io/${PROJECT_ID}/spring-datareader:0.2

• UserApi
  cd spring-user-api/
./mvnw clean package
docker build -t gcr.io/${PROJECT_ID}/spring-user-api:0.2 .
docker push gcr.io/${PROJECT_ID}/spring-user-api:0.2
kubectl set image deployment/userapi userapi=gcr.io/${PROJECT_ID}/spring-user-api:0.2

Debug Commands

kubectl get pod
kubectl exec -it <pod-name> -- /bin/bash