jgrumboe/example-voting-app-worker repository overview

⁠Example Voting App

⁠Getting started

Download Docker⁠. If you are on Mac or Windows, Docker Compose⁠ will be automatically installed. On Linux, make sure you have the latest version of Compose⁠.

Run in this directory:

docker-compose up

The app will be running at http://localhost:5000⁠, and the results will be at http://localhost:5001⁠.

Alternately, if you want to run it on a Docker Swarm⁠, first make sure you have a swarm. If you don't, run:

docker swarm init

Once you have your swarm, in this directory run:

docker stack deploy --compose-file docker-stack.yml vote

⁠Architecture

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

⁠Note

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