Microservices in kubernetes

Simple Kubernetes-based app that contains 3 services:

1. Flask (Python) microservice (management of applications' logs)
2. Sinatra (Ruby) microservice (OAuth server - user registration and login)
3. MongoDB

The purpose of this app is to log history about web apps requests.

Usage flow

By accessing Sinatra microservice:

1. Create user via POST /users endpoint by providing username and password as JSON
2. Login via POST /login endpoint by providing the same credentials (jwt token)

After that you can use Flask microservice (Warning! JWT authentication required). Flask microservice will query Sinatra auth microservice to check validity of token and resolve ID of the user via GET /check_login endpoint:

1. Take valid jwt token from previous step
2. Create application via POST /applications by providing name for the app as JSON
3. Check list of your current apps via GET /applications
4. Create log for particular app via POST /logs/<application_id> by providing ip_address and request (nested json) as JSON
5. Check list of the logs for this application GET /logs/<application_id>
6. See flask app routes for some more routes

Features

1. Containerized microservices (flask, sinatra)
2. Deployed to Kubernetes cluster (see folder with kubernetes components)
3. Communication between microservices to resolve user's authentication
4. MongoDB storage
5. JWT authentication
6. Nginx proxy-server via Kubernetes Ingress. See its config for the project

How to run

1. To run in development follow instructions on how to build related docker images written in flask folder and sinatra folder)
2. In production follow Kubernetes official guide to deploy a cluster. Deploy all Kubernetes components from Kubernetes config folder for example via kubectl apply -f <file>.yml