Adventures with Docker and K8s! By default, this project is wired up to leverage Docker for container creation, however there are configuration files available to use Kubernetes instead for development and deployment.
To run the entire stack locally via Docker:
$ docker-compose up
and then visit localhost:3000 in your browser of choice.
Front-End: React.js App
A user will interact with the web app. For example, when a user submits a number to be processed, then the Front-End app will communicate with the backend (Node.js) server.
Back-End: Node.js Server
This Back-End Server performs a number of operations, primarily functioning as an API for the two databases.
Redis Database
The Redis DB is an in-memory store, which is storing all indices and calculated values, and then returning those values as key-value pairs to the Node.js server (and ultimately back to the React app for the user to see).
PostgreSQL Database
This DB stores a permanent list of indices that has been received.
Worker Node
This worker node watches the Redis DB instance for any new indices. Whenever it sees a new indice, it will pull the indice, calculate the new value, and then return that value to Redis.