Arbal arbal

Installing microk8s in an LXC container (i.e.: proxmox)

This is an roundition of https://gist.github.com/acj/3cb5674670e6145fa4f355b3239165c7 which got a bit messy

Create a LXC container through the Proxmox web interface (ie.: ubuntu.23-10-lts)
- untick "unpriviledged" container
- in memory, set swap to 1024
- set mem to at least 4096
- in network, make sure you assign static ip-adress to the container

create container but don't start it.

How to install dlib v19.9 or newer (w/ python bindings) from github on macOS and Ubuntu

Pre-reqs:

Have Python 3 installed. On macOS, this could be installed from homebrew or even via standard Python 3.6 downloaded installer from https://www.python.org/download. On Linux, just use your package manager.
On macOS:
- Install XCode from the Mac App Store (or install the XCode command line utils).
- Have homebrew installed
On Linux:

Setup

Create a new directory with these three files (requirements.txt, main.py, README.md)
python -m venv venv
source venv/bin/activate
pip install -r requirements.txt
python main.py
Update main() to run the example prompt chains

This (and related gists) captures how i created my docker swarm architecture. This is intended mostly for my own notes incase i need to re-creeate anything later! As such expect some typos and possibly even an error...

Installation Step-by-Step

Each major task has its own gist, this is to help with maitainability long term.

Ubuntu 22.04 Annoyances

Here are a few collected ways I like to customize Ubuntu 22.04 servers. I used to love Ubuntu, but I hate auto updates and snaps. They also put ads and other usless ads diguised as "news" in MOTD. ESM FUD is spread throughout the OS including simple apt functions. You do not need ESM and thus Ubuntu 22.04 has become super annoying. unattended-upgrade is an automatic installation of security (and other) upgrades without user intervention. Consider the ramifications of disabling this service.

Disable unattended upgrades

The Unattended Upgrades feature is enabled by default and it runs at system boot without the user's permission. The configuration is stored in /etc/apt/apt.conf.d/20auto-upgrades

Disable: sudo dpkg-reconfigure unattended-upgrades then a TUI will come up, select "No"

This will not permantently disable the function. After an update it will be enabled. In the file /etc/apt/apt.conf.d/20auto-upgrades change these values from 1 to 0. Even doing this it will

	/// Decodes a dynamically-generated Uniform Type Identifier for inspection purposes. (NOT FOR PRODUCTION USE!)
	/// Many, many thanks to http://alastairs-place.net/blog/2012/06/06/utis-are-better-than-you-think-and-heres-why/
	///
	/// <https://developer.apple.com/library/ios/documentation/FileManagement/Conceptual/understanding_utis/understand_utis_conc/understand_utis_conc.html#//apple_ref/doc/uid/TP40001319-CH202-BCGCDHIJ>
	func decodeDynUTI(_ uti: String) -> String?
	{
	let vec = Array("abcdefghkmnpqrstuvwxyz0123456789")

	let encoded = Array(uti).suffix(from: 5)
	var result: [UInt8] = []

	# Based on answer from Yuval here: https://askubuntu.com/a/1214458/687179
	# output pairs in the format: `filename size`.
	# I used `nawk` because it's faster.
	find . -type f -print0 \| xargs -0 stat -f'%N %z' \| awk '
	{
	split($1, a, "."); # first token is filename
	ext = a[length(a)]; # only take the extension part of the filename
	size = $2; # second token is file size
	total_size[ext] += size; # sum file sizes by extension
	}

	#!/bin/bash
	printf "===START dns.google.com===\n"
	curl -k -H "accept: application/dns-json" "https://dns.google.com/resolve?name=example.com&type=AAAA"
	printf "\n===END dns.google.com===\n"
	printf "===START cloudflare-dns.com===\n"
	curl -k -H "accept: application/dns-json" "https://cloudflare-dns.com/dns-query?name=example.com&type=AAAA"
	printf "\n===END cloudflare-dns.com===\n"
	printf "===START 1.1.1.1===\n"
	curl -k -H "accept: application/dns-json" "https://1.1.1.1/dns-query?name=example.com&type=AAAA"
	printf "\n===END 1.1.1.1===\n"

	### Add trailing slash if needed

	STR="/i/am/a/path"

	length=${#STR}
	last_char=${STR:length-1:1}

	[[ $last_char != "/" ]] && STR="$STR/"; :

	echo "$STR" # => /i/am/a/path/

	#!/usr/bin/env bash

	echo 'net.ipv4.ip_forward = 1' \| sudo tee /etc/sysctl.d/20-tailscale.conf
	echo 'net.ipv6.conf.all.forwarding = 1' \| sudo tee -a /etc/sysctl.d/20-tailscale.conf
	sudo sysctl -p /etc/sysctl.d/20-tailscale.conf

	printf '#!/bin/sh\n\nethtool -K %s rx-udp-gro-forwarding on rx-gro-list off \n' "$(ip route show 0/0 \| cut -f5 -d" ")" \| sudo tee /etc/networkd-dispatcher/routable.d/50-tailscale
	sudo chmod 755 /etc/networkd-dispatcher/routable.d/50-tailscale

	sudo /etc/networkd-dispatcher/routable.d/50-tailscale