Voting App
Introduction to a toy application
The VotingApp is mainly used for demos and follows a microservices architecture. While it may not adhere to all architectural best practices, it is a good example of an application that utilizes various languages and databases. It helps in learning concepts related to Docker and Kubernetes. The VotingApp consists of 7 microservices, as illustrated in the following diagram:
Architecture
- vote-ui: A Vue.js frontend that allows users to choose between Cat and Dog
- vote: A backend API built with Python / Flask
- redis: A database where votes are stored
- worker: A service that retrieves votes from Redis and stores the results in a Postgres database
- db: The Postgres database where vote results are stored
- result: A backend that sends the scores to a user interface via websocket
- result-ui: An Angular frontend that displays the voting results
The container images for each microservice are available in the DockerHub. Their tags follow the Semantic Versioning pattern (vX.Y.Z). You can see the application running at https://vote.votingapp.xyz.
Since the VotingApp is packaged in a Helm Chart and distributed in the Docker Hub, it’s ready to be deployed on Kubernetes.