VotingApp

VotingApp is a microservices application, originally built by Docker, that I enhanced in several ways. I used it for Kubernetes workshops, training, and conference demos. It is simple but realistic enough to demonstrate many containers and Kubernetes concepts.

What it demonstrates

• Deployments and scaling
• Services and networking
• ConfigMaps and environment configuration
• Persistent storage
• Ingress routing
• GitOps workflows
• …

Architecture

The app is made of several microservices:

• vote-ui: front end in VueJS that enables a user to choose between a cat and a dog
• vote: backend exposing an API with Python / Flask
• redis: database where votes are stored
• worker: service, written in Go, that get votes from Redis and store the results in a Postgres database
• db: the Postgres database storing the results of the votes
• result: backend sending scores to a UI through websocket
• result-ui: front end in Angular displaying the results of the votes

Getting started

The repository includes Kubernetes manifests, a Helm chart, and Argo CD examples.

Live demo: vote.votingapp.xyz

Source: gitlab.com/voting-application