Ahmad Khamdani rizalord

K3S Setup

This document describes the steps to set up a k3s cluster on-premise. K3s is a lightweight Kubernetes distribution designed for production workloads in resource-constrained environments. This guide will walk you through the process of configuring a control plane, worker node, and an HTTP load balancer to ensure high availability and efficient traffic management for your k3s cluster.

Prerequisites

3 Ubuntu 20.04 servers with at least 2GB of RAM and 2 CPUs
- Number of servers is flexible, minimum 1 server for control plane and 1 server for worker node
- You also can use only 1 server as both control plane and worker node, but it is not recommended for production workloads
1 additional Ubuntu 20.04 server for the load balancer

OpenSSL Commands

Generate Private Key

openssl genrsa -out private.pem 3072

Generate Public Key from existing Private Key

openssl rsa -in private.pem -pubout -out public.pem

Node.js Deployment

Steps to deploy a Node.js app to DigitalOcean using PM2, NGINX as a reverse proxy and an SSL from LetsEncrypt

1. Sign up for Digital Ocean

If you use the referal link below, you get $10 free (1 or 2 months) https://m.do.co/c/5424d440c63a

2. Create a droplet and log in via ssh

I will be using the root user, but would suggest creating a new user

	{
	"keys": [
	{
	"kty": "RSA",
	"kid": "testing",
	"n": "rQYzKOPjiENQ5YNZyC8NG3NAmi6pb5CRJLNqY9xSZ4uA7z8bPzjoQW8-XPFSh_QrQbsVWO0cm8nO7hFW7IRzpKP_9oNpCKKWtJFhH2CacdC5gCPj4Hr-K5t-MXNpnSmgAd2l-3kBbL9yjrGBMAHVwc5S97k6P4efeweh1VE96nLk_H8IK2-QgnxWCve7LiFAfZ7eX_JDkXnWbzRX1aJwfFuXbzyLJ22USQ5JjEmjk8hTGdob5N3Fq67Bu_-0qUOzzRnfywDvKKa-egqP3E5hA7fTW6nGfxVrFDOOBqhjej5VH-o3nT1GVOKoGw4WnzMD0dGR8ALQmPwcGZde2p8pciCoJ2Om89cNt3GTBNNrdcUOvoWBOomNQThjvkEHpYStM_be5zci9ghA0oD8yDpZVm_RpSWr0gpIgNypKtjZTN5JDX5cYQZFUFzDhm0BnmktSVTP8qZlNdRCg_h-VO0N-9T2_TCPLZZCcSDK7yGzo6AkjB4T3jZB6nOhZPgKm6jr",
	"e": "AQAB"
	}
	]
	}