coolstore

This is an example demo showing a retail store consisting of several microservices based on NodeJS.

A Coolstore app where users can buy some cool merchandise.

• The UI is built with NodeJS and Angular. And the backend includes multiple Node.js services, such as
• Inventory , The stores inventory, how much items are available etc.
• Catalog , The products API
• Cart, Stores all users carts and intiates the order process by sending a message to Orders
• Orders, Completion and checking of orders
• Payments, Checks whether an payment is successfull given a certain Credit Card.

The demo is simple. Add an item to the cart. Checkout the item by going to the Cart tab. Add payment details. If the Card number starts with 4 the payment is successful else it will show status failed. this is a hard check in the payment service.

Once done, goto the Orders tab. The Order status should be In Progress, refresh after a couple of seconds and the status will appear as COMPLETED or FAILED. It takes a couple of seconds as their is a wait timer in Payment service + the whole process is done in a reactive and event driven way using Kafka and Quarkus.

Run Locally

The whole demo application can be run locally for those using docker/podman.

Run the docker-compose.yml file in the deploy directory

podman compose up

Cluster Setup

• Pre-Req: Have an Openshift cluster and log in using the oc client

• Change into the deploy directory

cd deploy

Create Project/Namespace

oc new-project coolstore-dev

Kafka Related

Install Kafka Operator

oc apply -f kafka-operator.yaml

Create instance

NEED TO WAIT ON THE OPERATOR READINESS FIRST

oc apply -f kafka-cluster-creation.yaml -n coolstore-dev

create topics

oc apply -f kafka-topics.yaml -n coolstore-dev

Redis Cache

Create Redis Cache

oc create -f redis-deployment.yaml -n coolstore-dev

Create Service for Deployment

oc apply -f redis-service.yaml -n coolstore-dev

Mongo DB Service

Create Configmap to hold init.js

oc create configmap mongo-db-init --from-file ./mongo-init.js -n coolstore-dev

Create the MongoDB Instance

oc create -f mongo-deployment.yaml -n coolstore-dev

Create MongoDB Service

oc apply -f mongo-service.yaml -n coolstore-dev

Node.s Service Deployment

Each Node.js service has a npm script named deploy that uses the Nodeshift cli to easily deploy your services to the cluster.

In each node application directory, run with:

npm run deploy

There is also a runnable script in the deploy directory that will deploy all the Node.js services in the correct order.

cd deploy/

./deploy-node-services.sh