It is an introduction study to Kubernetes. The proposal:

Specifications include:

• A setup.sh to... set things up.
• Dockerfiles written by me.
• One service for container.
• Use of Alpine Linux.
• nginx on ports 80 and 443 with auto-redirect from 80 to 443. Access through SSH on port 22.
• Single IP Load Balancer, only entry point. MetalLB recommended.
• WordPress on 5050 and redirect 307 from /wordpress.
• phpMyAdmin on port 5000 and reverse proxy from /phpmyadmin.
• MySQL.
• FTPS on port 21.
• Grafana monitoring all containers, on port 3000, linked to InfluxDB (on separate container). One dashboard per service.

FORBIDDEN:

• NodePort, Ingress Controller, kubectl port forward, DockerHub.

Let's get it on clustering!

• ./setup.sh : resets Minikube and mount everything over. You must be sudo because of virtual-inside-virtual (minikube driver=none) setup.
• ctl/logs.sh : logs current Kubernetes status.
• ctl/unit.sh : run some tests. Requires python3 and lftp. Edit ctl/unit.sh to setup the default user and password.

• Minikube version < 10 does not support virtualization inside virtualization (at least on my Oracles Virtual Machine). For this reason, this project uses --vm-drive=none, this also implies Minikube must be sudo run. Please install the latest version and conntrack:

	curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
	chmod +x minikube
	sudo mkdir -p /usr/local/bin
	sudo install minikube /usr/local/bin
	sudo apt install conntrack # for driver=none

• Check users and groups:

	sudo groupadd docker
	sudo usermod -aG docker user42
	newgrp docker

• Kill any running server:

	sudo pkill nginx

• Use ssh user42@$(minikube ip); password: "user42".
• To login into ftps, use: lftp $(minikube ip). Then set ssl:verify-certificate no and user user42; password: "user42".
• Three volumes are persistent and shared, the sql db, influx and /home (/home is accessible through ssh nginx:22 and ftp ftps).
• Use source <(kubectl completion zsh) for extra adrenaline when interacting with kubectl.

this project is part of the 42 São Paulo cursus

Copyright 2021 fde-capu

This is how I have made a Kubernetes project, afterall, researching on the Internet. I am happy if you find it usefull to your studies. If you find anything profitable, do not use it without getting in touch, and we can work together.