Demo

This project is a POC for microservices which has different flavours of backend written in REST, Reactive and Websockets. The frotnend is written in Angular 8.

The project can be run using docker-compose or deployed in Kubernetes.

How To Run Locally

Build and Run Backend

To build docker images for backend run following command:

mvn -pl eureka-server,service-one,service-two,reactive-service,websocket-service,gateway  -Dmaven.test.skip=true package jib:dockerBuild

or

mvn -pl service-one  -Dmaven.test.skip=true package jib:dockerBuild

dockerBuild requires your system to have the docker demon and will build images locally. build is more efficient but wont build images locally. You might need to change the docker.image.url in pom.xml if you are using build.

Now, just run all the service using docker-compose:

docker-compose up -d

Build and Run Frontend

Go to frontend folder and run

npm install

Then to start run

npm run start

How To Run on Kubernetes

Build Docker Images

To build docker images for backend run following command:

mvn -pl eureka-server,service-one,service-two,reactive-service,websocket-service,gateway  -Dmaven.test.skip=true package jib:dockerBuild

Build Frontend Image

To build docker image for frontend, run the following command inside frontend folder.

docker build -t dhananjay12/demo-frontend:latest .

Note :- Whatever image prefix name you give, change in the k8s accordingly.

Install local Ingress

https://kubernetes.github.io/ingress-nginx/deploy/

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.41.2/deploy/static/provider/cloud/deploy.yaml

If you want to delete later just use delete afterwards.

kubectl delete -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.41.2/deploy/static/provider/cloud/deploy.yaml

Run on K8

kubectl apply -f k8s

Open - localhost

Endpoints

Service One (REST)

Endpoint - /hello, /headers and /hop/{status}.

If calling via gateway then - /api/service-one/hello

/hop/{status} internally calls service-two /status/{status} endpoint and the response will be that code.

Service Two (REST)

Endpoint - /hello and /status/{status}

If calling via gateway then - /api/service-two/hello

Reactive Service (Web Flux)

Endpoint - /greetings/sse and /greetings

If calling via gateway then - /reactive-web-producer/greetings/sse

WebSocket Service (Websocket)

Websocker Connect Endpoint - /gs-guide-websocket
Topic - /topic/greetings Message Mapping - /hello

If calling via gateway then - /websocketservice/gs-guide-websocket