Polyglot Sample Microservices Application

Products	Cart	Orders

Simplified cloud-native ecommerce application hosted on Kubernetes, allowing users to browse products and submit orders through an iOS frontend. The goal of the project is to experiment with languages, frameworks and architectures

Table of Contents

1. Architecture
2. Getting Started
3. Roadmap
4. Contact

Architecture

System

Service	Language	Description
frontend-ios	Swift	Mobile UI
gateway	Helm / Yaml	API Gateway that forwards clients to the micro-services, handles JWT validation, terminates tls and transforms url paths
identity-service	Typescript	Manages customer accounts and signs JWTs (symmetric HMAC), while hosting a JSON Web Key set (JWK) to offload authorization
catalog-service	Java	Manages a catalog of products and categories
cart-service	Go	Manages shopping carts for registered customers
order-service	Typescript	Manages complete orders for registered customers based on shopping carts
payment-service	Go	Manages payments based on orders from registered customers, offloading payment processing to the Stripe payment gateway
load-generator	Python	Generates artificial load using Python config files

Authentication

Frontend iOS

Technologies

Ops

• Docker
• Kubernetes
• Helm
• Skaffold
• Prometheus
• Grafana
• Locust

Dev

• iOS (with RxSwift)
• Nodejs Express
• Go net/http (vanilla Go)
• Java Springboot
• Postgresql (relational database)
• Redis (cache)
• Minio (S3)

Getting Started

Prerequisites

• Docker
• Skaffold (Kubernetes only)

Deploy

Kubernetes Local Docker Desktop

Ensure Docker and Skaffold are installed

1. Enable Kubernetes on Docker Desktop
2. Clone this repository

git clone git@github.com:Bajocode/polyglot-microservices-webshop.git
cd polyglot-microservices-webshop

3. Deploy

# The user value forwards skaffold.yaml defined services (the gateway :8080)
skaffold run --port-forward=user --tail

wait and verify all helmcharts have been deployed

kubectl get pods

NAME                                READY   STATUS    RESTARTS   AGE
cart-service-7b9695d479-s2r4t       1/1     Running   0          8m1s
cart-service-redis-master-0         1/1     Running   0          8m1s
catalog-service-58dbd85c8b-pftj5    1/1     Running   0          8m12s
catalog-service-postgresql-0        1/1     Running   0          8m12s
gateway-87cf57767-47qnc             1/1     Running   0          7m34s
identity-service-567685c7b6-mcx68   1/1     Running   0          7m52s
identity-service-postgresql-0       1/1     Running   0          7m51s
loadgenerator-58c8d474f8-zxctx      1/1     Running   0          7m32s
order-service-5df4f68cb9-vtkvv      1/1     Running   0          7m38s
order-service-postgresql-0          1/1     Running   0          7m38s
payment-service-5bdf497d8b-6nxt2    1/1     Running   0          7m36s

4. The gateway is exposed by skaffold. To do it manually:

kubectl port-forward deployment/gateway 8080

5. Destroy (optional)

skaffold delete

Docker Compose

Ensure Docker and Docker Compose are installed

1. Clone this repository

git clone git@github.com:Bajocode/polyglot-microservices-webshop.git
cd polyglot-microservices-webshop

3. Deploy

docker compose up

5. Destroy (optional)

docker compose down --rmi all

Test

Verify the backend and infrastructure

e2e_test.sh: (simplified test framework I've written in bash)

./e2e_test.sh

Roadmap

• async message passing
• images and object-store (minio)
• service bus architecture with RabbitMQ
• end to end testing
• payment with tokens
• react front-end

Contact

Fabijan Bajo - linkedIN - email

Project link: https://github.com/Bajocode/polyglot-microservices-webshop