RichardBronosky

Kubernetes on (vanilla) Raspbian Lite

Yes - you can create a Kubernetes cluster with Raspberry Pis with the default operating system called Raspbian. This means you can carry on using all the tools and packages you're used to with the officially-supported OS.

This is part of a blog post Serverless Kubernetes home-lab with your Raspberry Pis written by Alex Ellis.

Copyright disclaimer: Please provide a link to the post and give attribution to the author if you plan to use this content in your own materials.

Pre-reqs:

RichardBronosky

#!/bin/bash
#
# This version uses September 2017 august stretch image, please use this image
#

if [ "$EUID" -ne 0 ]
	then echo "Must be root"
	exit
fi

RichardBronosky

tmux [MINIMAL] cheat sheet

Objective

This is the minimum you should memorize to feel at home on any server your SSH into. There are many cheatsheets out there that try to be exhaustive, or suggest mapping shit to more convenient locations, but that is not the goal of this one. Everyone should use tmux for every connection, to every server, always. Memorizing this brings down the barrier to doing so.

Sessions, windows, panes

Session is a set of windows, plus a notion of which window is current.

RichardBronosky

#!/bin/bash -e

# Quick start-stop-daemon example, derived from Debian /etc/init.d/ssh

NAME=blink
DIR=/home/pi
PIDFILE=/home/pi/$NAME.pid
DAEMON=/home/pi/pi_gpio_hack.py
DAEMON_ARGS="[[31,0,37,1],[31,1,37,0]]"
STOP_SIGNAL=INT

RichardBronosky

#!/bin/bash

# Usage: AIO_KEY=key_hash FEED_KEY=name_of_feed VALUE=an_integer send_io.sh
# Specify any or none of the environment variables

aio_key="${AIO_KEY:-feedfacedeadbeef}" # default: replace everything after the -
feed_key="${FEED_KEY:-myfeedname}" # default: replace everything after the -
value="$(sed 's/"/\\"/g' <<<"${VALUE:-$(( ( RANDOM % 25 )  + 1 ))}")" # default: random int between 0 and 25

curl -H "X-AIO-Key: $aio_key" \

RichardBronosky

How to use this

mkdir temp; cd temp
curl -LO https://gist.githubusercontent.com/RichardBronosky/33e4ce3b4718cd73162481804a33fe94/raw/SimpleHTTPServerWithUpload.py
python2 SimpleHTTPServerWithUpload.py 8080

or

mkdir temp; cd temp

wget https://gist.githubusercontent.com/RichardBronosky/33e4ce3b4718cd73162481804a33fe94/raw/SimpleHTTPServerWithUpload.py

RichardBronosky

==========================================          ==========================================
             TMUX COMMAND                                        WINDOW (TAB)
==========================================          ==========================================

List    tmux ls                                     List         ^b w
New          -s <session>                           Create       ^b c
Attach       att -t <session>                       Rename       ^b , <name>
Rename       rename-session -t <old> <new>          Last         ^b l               (lower-L)
Kill         kill-session -t <session>              Close        ^b &

RichardBronosky

User 1

remote_server=172.31.0.1
git daemon --verbose --export-all --base-path=.git --reuseaddr --strict-paths .git/ > /tmp/git-serve.log 2>&1 &
ssh -R 9418:localhost:9418 ec2-user@$remote_server
git clone git://localhost/ local-repo-name

Repo from workstation is cloned onto server.

User 2

RichardBronosky

#!/usr/bin/env python3
# taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/
# generate server.xml with the following command:
#    openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes
# run as follows:
#    python simple-https-server.py
# then in your browser, visit:
#    https://localhost:4443

import http.server

RichardBronosky

Raspberry Pi VPN Router

This is a quick-and-dirty guide to setting up a Raspberry Pi as a "router on a stick" to PrivateInternetAccess VPN.

Requirements

Install Raspbian Jessie (2016-05-27-raspbian-jessie.img) to your Pi's sdcard.

Use the Raspberry Pi Configuration tool or sudo raspi-config to: