Aula — A microservice oriented webservice exploring the CNCF landscape

Goals

• Microservices: Implement a webservice using a microservice architecture
• Containerized: Every service should be able to run within its own container.
• Cloud Native: Try to incorporate useful tooling from the CNCF project.
• Serverless: Explore how serverless and a microservice architecture work together.
• Learn: Explore latest techniques, tools from the Cloud Native Foundation and industry and have fun doing so.

Getting started

Recommend way is to use the provided docker environment:

# setup env
$ make configure
# start app
$ docker-compose up

This repo is exploring the monorepo paradigm. To facilitate this Lerna is used. Getting started should be as simple as running npm install:

$ npm install
# start app
$ npx lerna start

Note: This method requires you to setup your own environment

Packages

• 🌍 base-server — Base HTTP server with Express.js
• 🎖 commands — Shared commands constants used by services
• 🔐 crypto — Encryption utilities
• 🎆 events — Shared events constants emitted by services

Services

• 🔑 auth — Authentication with JWT
• 📓 course — Course REST API
• 🕵️‍♂️ search — Search REST API using Elasticsearch
• 👨‍🎨 user — User REST API
• 🦄 web — SSR React web app with Next.js
• 🔮 websocket — Websockets with socket.io

Screenshots

Release

Releasing a new version can be done via the make release command. This command will ask you for a version tag or fallback to branchname-commithash. After the build images will be pushed to the hub.

# Build and push images
$ make release
QUEST:   Version tag?:[master-87265e6] -> 1.0.0
INFO:    Starting build for version 1.0.0
...

Todo

Packages

• Events
• Commands
• HTTP Api's client libraries with circuit breaker (opossum)

Services

• Move services from packages to services
• Authenticate websocket requests
• Workers (eg. search indexers) with queue groups
• Caching (maybe: apicache)
• Authorization with express-jwt-permissions
• Version message queue
• Course content (files)
• Course enrollment
• Notifications
• Emails
• Grades
• Feed
• Recommendation (search)
• Graphql

App

• Implement search
• Implement course detail page

Testing

• Smoke test after build, before release
• Write tests and run through CI

Operations

• Logging
• Tracing
• Automate provisioning (db, servers, elastic etc.)
• Deployment
• Istio
• Autoscaling

CI

• Only build changed services
• Build multiarch images