Kubernetes example with Grpc Protobuf

I have the two application setup as client and server

• Greeter Client for Rest API and Protobuf client for sending the Protobuf request
• Greeter Client for accepting the request and sending the response

Deployment

Pods

I have two kubernetes pods

• First pod has the Greeter Client
• Second pod for Greeter Server

Services

Two services

• First service has ports 8080
• Second service has port 9090 open for handling protobuf communication

Local setup

If you want to build locally update the application.yaml in greeter-service to the following address: "static://localhost:9090"

Commands

Build the Project

./gradlew  build  
cd greeter-client
docker build -t greeter-client:1.0 .  

cd ../greeter-server
docker build -t greeter-server:1.0 .  

Deploy in Kubernetes , I am using Minikube

minikube start --container-runtime=containerd
minikube image load greeter-client:1.0
minikube image load greeter-server:1.0
minikube tunnel ( Run in a new window and keep it open)

Kubernetes deployment

cd ../deployment

kubectl apply -f greeter-server-deployment.yaml
kubectl apply -f greeter-client-deployment.yaml

Check every thing is up

kubectl get pods
kubectl get services 

Test

Protobuf test

curl http://localhost:8080/hello?name=Biker
curl http://localhost:8080/hello?name=MountainBiker

Clean up

kubectl delete service greeter-client
kubectl delete service  greeter-server
kubectl delete deployment greeter-client-deployment
kubectl delete deployment greeter-server-deployment

Wait ! what about Streaming .. this is just a single request

Switch to the backpressure branch for that example