Travis Smith butangero

Mock Exam

1

Q1. The metric node_cpu_temp_celcius reports the current temperature of a nodes CPU in celsius. What query will return the average temperature across all CPUs on a per node basis? The query should return {instance=“node1”} 23.5 //average temp across all CPUs on node1 {instance=“node2”} 33.5 //average temp across all CPUs on node2.

node_cpu_temp_celsius{instance="node1", cpu="0"} 28
node_cpu_temp_celsius{instance="node1", cpu="1"} 19
node_cpu_temp_celsius{instance="node2", cpu="0"} 36
node_cpu_temp_celsius{instance="node2", cpu="1"} 31

Embedding Diagrams in GitHub Markdown

This explains and demos how to use diagrams.net (draw.io) diagrams in your GitHub repo.

See repo for more details

Benefits of using diagrams.net in GitHub repositories

Diagrams are stored in your repository with your code and docs
Diagram access is controlled by GitHub repository access

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

Setup Mac OS X

I've done the same process every couple years since 2013 (Mountain Lion, Mavericks, High Sierra, Catalina) and I updated the Gist each time I've done it.

I kinda regret for not using something like Boxen (or anything similar) to automate the process, but TBH I only actually needed to these steps once every couple years...

Code Minecraft with Python on Mac OSX

Here's a step-by-step to get started scripting Minecraft with Python on Mac OSX

Guide to Resetting a csync2 Cluster

Introduction

These are possible steps to reset a csync2 cluster that has been seriously fubared. This is an apocalyptic approach and should only be used when more surgical fixes (like correcting an individual conflict) aren't workable.

Use Cases

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

	#!/bin/sh
	if [ "$1" = "" ]; then
	echo "Usage: kshell <pod>"
	exit 1
	fi
	COLUMNS=`tput cols`
	LINES=`tput lines`
	TERM=xterm
	kubectl exec -i -t $@ env COLUMNS=$COLUMNS LINES=$LINES TERM=$TERM bash

	#!/usr/bin/env bash

	# This script clones all repos in a GitHub org
	# It requires the GH CLI: https://cli.github.com
	# It can be re-run to collect new repos and pull the latest changes

	set -euo pipefail

	USAGE="Usage: gh-clone-org <user\|org>"