Chad Mayfield chadmayfield

Brew Bundle Brewfile Tips

Copyright & License

Unless otherwise noted (either in this file or in a file's copyright section) the contents of this gist are Copyright ©️2020 by Christopher Allen, and are shared under spdx:Creative Commons Attribution Share Alike 4.0 International (CC-BY-SA-4.) open-source license.

Sponsor

If you more tips and advice like these, you can become a monthly patron on my GitHub Sponsor Page for as little as $5 a month; and your contributions will be multipled, as GitHub is matching the first $5,000! This gist is all about Homebrew, so if you like it you can support it by donating to them or becoming one of their Github Sponsors.

Minecraft on Raspberry Pi cluster with metrics

Ever wanted to put your Rapsberry Pi cluster to great use? Our team is working remotely, so we started to play Minecraft. I decided I would host the Minecraft server on my Raspberry Pi cluster. This gist will guide you through the steps I took to get a k3s cluster up with k3sup and later installed Minecraft as well as metrics exporter and Prometheus Operator

Why?

Quoniam Possumus - Because we can

You'll need

Network Interface Notes

Beginning in Systemd v197, network interfaces assigned by systemd/udev are "predicatble";

Names are now based on;

Index numbers for on-board devices (eno1)
PCI-ehotplug slot index numbers (ens1)
Physical/geographical location of hardware connector (enp2s0)
MAC address (enx78e7d1ea46da)
Classic, unpredictable kernel-native naming (eth0)

My Kuberentes Command Reference

This is my Kubernetes reference page. Most are commands that I don't want to forget, links to credits where due.

Get detailed cluster information

kubectl cluster-info dump

Get list of Kubernetes node IP addresses

kubectl get nodes -o jsonpath='{ $.items[*].status.addresses[?(@.type=="InternalIP")].address }'

This process would likely apply to other Homebrew formula also.

First search for your desired package:

brew search go

You should get a list of results that include the below. Not "go" is very unspecific so you may get a lot of results:

	#!/usr/bin/env python
	from __future__ import print_function

	'''
	Usage:
	./rrd_to_openmetrics.py /path/rrd_directory/ > openmetrics.txt
	'''

	'''
	Directory structure :

	#!/usr/bin/env bash

	CIPHERS='ALL:eNULL'
	DELAY=${2:-0.1}
	SERVER=${1:?usage: $0 <host:port> [delay, default is ${DELAY}s] [ciphers, default is ${CIPHERS}]}
	MAXLEN=$(openssl ciphers "$CIPHERS" \| sed -e 's/:/\n/g' \| awk '{ if ( length > L ) { L=length} }END{ print L}')

	echo Using $(openssl version).

	declare -A TLSMAP=( [tls1_1]=cipher [tls1_2]=cipher [tls1_3]=ciphersuites )

	#!/usr/bin/env python3
	# Copyright (c) 2019 Blake Covarrubias
	#
	# This software is released under the MIT License.
	# https://opensource.org/licenses/MIT

	"""Helper script to generate HelmChart CRDs for use with the K3s Kubernetes

	This script creates HelmChart resource definitions for use on the K3s Kubernetes
	distribution. The command line arguments closely resemble the behavior of

	#!/usr/bin/env python3
	from os import path
	import tempfile
	import subprocess
	import datetime as dt
	import click


	@click.group()
	def cli():

	#!/usr/bin/python3
	import os

	shodan = ["104.131.0.69", "104.236.198.48", "155.94.222.12","155.94.254.133", "155.94.254.143", "162.159.244.38", "185.181.102.18", "188.138.9.50", "198.20.69.74", "198.20.69.98", "198.20.70.114", "198.20.87.98", "198.20.99.130", "208.180.20.97", "209.126.110.38", "216.117.2.180", "66.240.192.138", "66.240.219.146", "66.240.236.119", "71.6.135.131", "71.6.146.185", "71.6.158.166", "71.6.165.200", "71.6.167.142", "82.221.105.6", "82.221.105.7", "85.25.103.50", "85.25.43.94", "93.120.27.62", "98.143.148.107", "98.143.148.135"]

	for ip in shodan:
	os.system("iptables -A INPUT -s {} -j DROP".format(ip))