I've decided to learn some system design principles, patterns and actually build some stuff and put it here.

Couple of a simple python/flask app instances with an nginx as a load balancer in front, everything runs in docker containers. Here nginx operates as a load balancer and is using Round Robin principle, to change that you have to change it's configuration file (./nginx/nginx.conf) according to this link http://nginx.org/en/docs/http/load_balancing.html

• Python/Flask
• Nginx
• Docker/Docker-Compose

Run command: docker-compose up

A simple server with one endpoint receiving commands for asynchronous execution which puts messages to the Rabbit MQ, and a worker app which is listening to the Rabbit MQ and executes command once it's received. This examples is copied from this source: https://medium.com/better-programming/background-processing-with-rabbitmq-python-and-flask-5ca62acf409c // TODO add frontend app for receiving async results

• Python/Flask
• RabbitMQ
• Docker/Docker-Compose

Run command: docker-compose up

A server with external IP on request save it in the database and sends a message to the RabbitMQ, a simple micro-service (MailSender) listening to the RabbitMQ receives the message and sends according mail to someone

• Python/FastAPI
• RabbitMQ
• Docker/Docker-Compose
• Kubernetes

• Setup Kubernetes with docker desktop
• Run kubectl apply -f . in the k8 folder
• Destroy kubectl delete all --all

Spring Boot server connected to a postgres DB and Reddis caching retrieved data to redis

• Redis
• Java/Spring Boot
• Docker/Docker-Compose

• Run docker compose up