ZouhairCharef

5 Steps for Creating Templates and Virtual Machines on Proxmox using Linux Distro's Cloud Images

This tutorial guides you through the process of creating Templates and Virtual Machines on Proxmox using cloud-based images from various Linux distributions. We provide clear instructions for Alma Linux 9, Amazon Linux 2, CentOS 9, Fedora 38, Oracle Linux 9, RHEL 9, Rocky Linux 9, and Ubuntu 23.04 Lynx Lobster.

Note: The instructions have been tested on Proxmox 8.0.4.

Let's begin by choosing the cloud-based image. If you already have your preferred Linux distribution, skip to the 1st step.

To assist in making informed choices when selecting a Linux distribution for your virtual machines, we've compiled a table showcasing key characteristics of each cloud image. This table provides a snapshot of important attributes, including kernel version, Python version, number of processes initialized after boot, number of packages installed, free memory after boot, VM disk size, root partition disk size, used size on t

How to Install Sonarqube in Ubuntu Linux

Prerequsites

Virtual Machine running Ubuntu 22.04 or newer

Install Postgresql 15

sudo apt update
sudo apt upgrade

sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'

Install Rancher Manager With Lets Encrypt (Linux)

Infrastructure

Domain Name
Ability to make DNS Changes
Debian 11 Virtual Machine (Should work with Ubuntu)
Port 80 & 443 must be accessible for Let's Encrypt to verify and issue certificates

Pick a subdomain and create a DNS entry pointing to the IP Address that will be assigned to the Rancher Server

RKE2 Node Cleanup To reset a RKE2 node, run the following commands:

# rke2-(server|agent) related
rke2-killall.sh
rke2-uninstall.sh
# rancher-system-agent related
systemctl stop rancher-system-agent.service
systemctl disable rancher-system-agent.service
rm -f /etc/systemd/system/rancher-system-agent.service

Monitor Calico Felix using Prometheus Operator

Make sure you have these settings enabled in felix, in this case using enviornment variables:

FELIX_PROMETHEUSMETRICSENABLED = True
FELIX_PROMETHEUSMETRICSPORT = "9091"
FELIX_PROMETHEUSGOMETRICSENABLED = True
FELIX_PROMETHEUSPROCESSMETRICSENABLED = True

Kubernetes Installation & Setup Guide

https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/

Before Begin

Following document is about installing and setting up a cluster using kubernetes. Basic structure it supports is a cluster with one MASTER and multiple NODES(slave nodes).

COMMON : You should perform for both MASTER and NODE.
MASTER : You should perform for MASTER only.
NODE : You should perform for NODE only.

	## Prerequisites:

	# 1) Create a Docker IPv4 bridge network
	# 2) Pick an IPv4 Address for Traefik, use the end of the network range
	# 3) Pick a domain, recommend real DNS but faking is possible by editing the /etc/hosts file to point to Traefik's IPv4 address.
	# 4) Replace the ${DOMAIN} place holder in the config-ldap.yaml, and env-config.js and files with the domain.
	# 5) Get a valid certificate via Let's Encrypt or another method, recommend a wildcard cert
	# 6) Copy cert/private key as /etc/letsencrypt/live/${DOMAIN}/{privkey.pem, fullchain.pem}, Uncomment lines 233-234 in the docker.compose.yml file
	# Also uncomment the lines in traefik_dynamic.yaml after cert and key are in place
	# 7) Copy this file as '.env', fill out with the appropriate values

	# Copyright 2017 The Kubernetes Authors.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,

	#!/bin/bash

	#Harbor on Ubuntu 18.04

	#Prompt for the user to ask if the install should use the IP Address or Fully Qualified Domain Name of the Harbor Server
	PS3='Would you like to install Harbor based on IP or FQDN? '
	select option in IP FQDN
	do
	case $option in
	IP)


	Questions are not from any actual exam!!!



	Q: Create a job that calculates pi to 2000 decimal points using the container with the image named perl
	and the following commands issued to the container: ["perl", "-Mbignum=bpi", "-wle", "print bpi(2000)"]
	Once the job has completed, check the logs to and export the result to pi-result.txt.

	Solution: