Microservices architected E-commerce platform.
# Setup k8s secrets
kubectl create secret generic jwt-secret --from-literal=JWT_KEY=132skafold dev
Access MongoDB pods from external IDE by exposing, for example:
kubectl port-forward service/product-mongo-service 27017:27017
# connect though localhost:27017 on mongodb compass app
# To debug NATS streaming event data:
kubectl port-forward deployment/nats-depl 8222:8222
# TODO: Make UI with this data:
# access http://localhost:8222/streaming in a browser
# access http://localhost:8222/streaming/channelsz?subs=1 for subscriptions listThis project was built as a learning adventure to learn more about the micro-services architecture and to learn more about high-availability applications.
And so I've decided to build an online shopping application. With these requirements I went on using Kubernetes for container orchestration and deployment management.
As for the services, all of them are written in TypeScript and the web services in NodeJS using HapiJS.
In order to make the services really independent from one another, each service has its own database. However, a service database can only be accessed from it's own service, if data needs to shared to another service it's done by sending events to the event bus.
Data sharing was a big problem to solve when I initially adapted a micro-service architecture, I've used NATS streamming server as an event bus to solve this problem, so all communication is done through events.
Sometimes when multiple images of the same service are running I've run into concurrency problems, for example, when sending multiple requests to update a record, they were processed in the wrong order. And so I've implemented Optimistic concurrency control to all event data.
On every PR made to origin one or multiple github actions are triggred to run depending on the changed services. They'll run the unit and integration tests and run a linting check.
After a PR is merged to origin, it will trigger a Google cloud action to run and deploy the specific services changed on GKE.