prologic

Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

AlexVanderbist

opendb () {
   [ ! -f .env ] && { echo "No .env file found."; exit 1; }

   DB_CONNECTION=$(grep DB_CONNECTION .env | grep -v -e '^\s*#' | cut -d '=' -f 2-)
   DB_HOST=$(grep DB_HOST .env | grep -v -e '^\s*#' | cut -d '=' -f 2-)
   DB_PORT=$(grep DB_PORT .env | grep -v -e '^\s*#' | cut -d '=' -f 2-)
   DB_DATABASE=$(grep DB_DATABASE .env | grep -v -e '^\s*#' | cut -d '=' -f 2-)
   DB_USERNAME=$(grep DB_USERNAME .env | grep -v -e '^\s*#' | cut -d '=' -f 2-)
   DB_PASSWORD=$(grep DB_PASSWORD .env | grep -v -e '^\s*#' | cut -d '=' -f 2-)

superseb

RKE2 commands

• Updated on May 29 to accommodate etcd container not having /bin/sh available anymore.

Install

curl -sL https://get.rke2.io | sh
systemctl daemon-reload
systemctl start rke2-server

ChristopherA

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.

gabrielsson

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

gillg

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

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

'''
Directory structure :

jahir

#!/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 )

blake

#!/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

chadmayfield

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)

chadmayfield

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 }'