Example Voting App

A simple distributed application running across multiple Docker containers.

Getting started

Run in this directory to build and run the app:

docker compose build
docker compose up

For the first time, execute commands described in mongo.sh one by one in terminal.

The vote app will be running at http://localhost:5100, and the results will be at http://localhost:5001.

Architecture

• A front-end web app in Python which lets you vote between two options
• A Redis which collects new votes
• A .NET worker which consumes votes and stores them in…
• A Postgres database backed by a Docker volume
• A Node.js web app which shows the results of the voting in real time

Notes

The voting application only accepts one vote per client browser. It does not register additional votes if a vote has already been submitted from a client.

This isn't an example of a properly architected perfectly designed distributed app... it's just a simple example of the various types of pieces and languages you might see (queues, persistent data, etc), and how to deal with them in Docker at a basic level.