ljfranklin

Steps

One-time setup

# Enable emulation for cross-platform images
sudo apt-get install -y binfmt-support qemu-user-static

# Enable cross-build commands in docker
docker buildx create --use

ljfranklin

Install Arch Linux

Create a bootable Arch Linux USB

1. Download arch ISO from https://www.archlinux.org/download/
2. Copy the ISO to the USB drive:
   • From a Linux machine:

   # replace sdX with usb drive listed by `fdisk -l`,
   

e.g. /dev/sdb, do NOT append a partition number

ljfranklin

A "production-ish" Kubernetes cluster on Raspberry Pi

(Gopher image by Ashley McNamara)

Table of contents:

• Let's Build
• Why though?

ljfranklin

# Start ethernet
usb start

# U-Boot Parameters
setenv initrd_high "0xffffffff"
setenv fdt_high "0xffffffff"

# Mac address configuration
setenv macaddr "00:1e:06:61:7a:39"

ljfranklin

DEBUG='embedded,' \
DEBUG+='netdevice,' \
DEBUG+='netdev_settings,' \
DEBUG+='image,' \
DEBUG+='dhcp,' \
DEBUG+='efi_acpi,' \
DEBUG+='efi_autoboot,' \
DEBUG+='efi_block,' \
DEBUG+='efi_bofm,' \
DEBUG+='efi_debug,' \

ljfranklin

Install snapserver/snapclient.

Create /etc/systemd/system/snapfifo.service with contents:

[Unit]
Description=Pipes line-in to /tmp/snapfifo pipe
After=snapserver.service

[Service]

ljfranklin

• Download OS: http://www.orangepi.org/downloadresources/orangepizero/2017-05-05/orangepizero_e7c74a532b47c34968b5098.html
• Extract once: unrar x Raspbian_server_For_zero_H2+_V0_1.rar
• Extract again: unxz < Raspbian_server_For_zero_H2+_V0_1.img.xz > Raspbian_server_For_zero_H2+_V0_1.img
• Copy OS onto SD card: sudo dd^Cs=4M if=Raspbian_server_For_zero_H2+_V0_1.img of=/dev/sda conv=fsync
  • Ensure disk is unmounted
• Pinout: https://forum.armbian.com/uploads/monthly_2017_03/orangepizeromcp3008.jpg.7cffc0474b56f40ef1d64f39a57ea5c2.jpg
• Connect USB-to-TTL cable
  • Note: TX should connect to RX on board, RX to TX on board, ground connected but 5v and 3.3V are unconnected
• Connect over TTL: sudo screen /dev/ttyUSB0 115200
• Power on board

ljfranklin

Instance   control/7eb695e4-cfb6-47ab-bbe2-8d77cd299e18  
Exit Code  1  
Stdout     Running smoke tests...  
           Running binaries smoke/isolation_segments/isolation_segments.test  
           smoke/logging/logging.test  
           smoke/runtime/runtime.test  
           [1544651752] CF-Isolation-Segment-Smoke-Tests - 4 specs - 4 nodes   
           ------------------------------  
             
           [2018-12-12 21:55:52.75 (UTC)]> cf api https://api.sys.pale-talon.gcp.releng.cf-app.com   

ljfranklin

## Bash Prog Intro Notes

http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html
http://tldp.org/LDP/abs/html/
http://mywiki.wooledge.org/BashPitfalls

## Intro:
I feel like writing bash is like building something with hot glue.
When try it for the first time, you'll probably make a big mess and burn yourself.
As you get a little more experienced, you can slap things together really quickly but the end result won't be very sturdy or pretty.

ljfranklin

#!/usr/bin/env bash

set -e

HOURS=$1

green='\033[32m'
yellow='\033[33m'
nc='\033[0m'