DERNAT Rémy remyd1

Bootstrap Tenant

This file is used for a bootstrapping for a new user that will join the Crocc or Drocc Openstack cluster.
It could be:

A project creation
A user adding into an existing project

Note

During the process Quotas and information will be asked.

Ubuntu Packer VirtualBox

A simple Packer + Vagrant VirtualBox install of Ubuntu live-server 22.04 (x86) using Cloud-Init, and documentation of my host desktop.

host setup

A fresh install of any supported LTS or the latest Ubuntu desktop version is good. I have tested this on ubuntu 18.04.6 running on an i5-4570 (4 core 3.20GHz) with 16GB of RAM, a nearly 10 year old computer. Get a dedicated machine, it need not be fancy or new.

Update and get setup with some tools + deps first:

Looking to create a Software RAID 1 setup for your 2-disk server on Ubuntu Server 20.04?

Let's start with the basics: the official guide by Ubuntu (https://ubuntu.com/server/docs/install/storage) is outdated/wrong. And as of March 2021 it's possible that there's a bug as well with how the bios_grub partitions are created when using multiple disks.

Now on to the solution:

Select "Custom storage layout" when you reach the storage configuration step of the installer.
If the disks have existing partitions, click on each disk under AVAILABLE DEVICES and then select REFORMAT. This will (temporarily) wipe out the partitions.

Compiling an optimized ATLAS on Ubuntu 12.04

Download the latest ATLAS source from http://sourceforge.net/projects/math-atlas/files/. I'm using version 3.10.1
Download the latest Netlib LAPACK from http://www.netlib.org/lapack/. I'm using version 3.4.2
Turn off frequency scalings on your chip so that you can get reliable timings. This is essential to get a good ATLAS build

  sudo apt-get install cpufreq-info cpuspeed cpufrequtils sysfsutils
  # set each core to the "performance" governor, so that the clock frequency doesn't go down when idle
  # I have 8 cores, which is why I need to do this 8 times
  sudo cpufreq-selector -c 0 -g performance

	#!/bin/bash

	export version=v8.0.7
	export os=linux
	export arch=amd64

	#####################################

	curl -O https://get.gravitational.com/teleport-$version-$os-$arch-bin.tar.gz
	tar -xzf teleport-$version-$os-$arch-bin.tar.gz

	#!/bin/bash

	export version=v4.2.8
	export os=linux
	export arch=amd64

	#####################################

	curl -O https://get.gravitational.com/teleport-$version-$os-$arch-bin.tar.gz
	tar -xzf teleport-$version-$os-$arch-bin.tar.gz

	#! /usr/bin/env ruby

	# NOTE: Requires Ruby 2.1 or greater.

	# This script can be used to parse and dump the information from
	# the 'html/contact_info.htm' file in a Facebook user data ZIP download.
	#
	# It prints all cell phone call + SMS message + MMS records, plus a summary of each.
	#
	# It also dumps all of the records into CSV files inside a 'CSV' folder, that is created

	#!/bin/bash

	# This script allows you to chroot ("work on")
	# the raspbian sd card as if it's the raspberry pi
	# on your Ubuntu desktop/laptop
	# just much faster and more convenient

	# credits: https://gist.github.com/jkullick/9b02c2061fbdf4a6c4e8a78f1312a689

	# make sure you have issued

	#!/bin/bash
	#
	# dockerpsns - proof of concept for a "docker ps --namespaces".
	#
	# USAGE: ./dockerpsns.sh
	#
	# This lists containers, their init PIDs, and namespace IDs. If container
	# namespaces equal the host namespace, they are colored red (this can be
	# disabled by setting color=0 below).
	#

	# NOTE: This gist includes the '.sh' extension to enable syntax highlighting
	# on the gist web viewer. However, it is NOT intended to be run as a script.
	# These are just notes I took.

	################################################################################
	#
	# CentOS 7 - Simple IPv4 NAT Router
	#
	# This gist provides a brief walkthough on setting up a simple NAT router on
	# CentOS 7 that will allow multiple machines on an internal network to share