alanbchristie

#!/usr/bin/env python

# A create-server utility as it would have been written by 'Robert I'.
# A wrapper around the OpenStack SDK to try (and try again) to create
# OpenStack server instances.
#
# Note:     This module DOES NOT provide all the functionality of
# ----      the underlying API, just those bits I need for my work.
#
# You will need your OpenStack environment variables defined

alanbchristie

# A simple example using the Clubhouse API
# to get exiting labels and update them -
# in this case, change their colour.
#
# You'll need: -
#
#  curl
#  jq

# List labels

alanbchristie

# (Notes written from an OSX host)

# Assuming you've...
#
# - Done 'touch ssh' on the SSD before instering it into the Pi
# - Added a suitable `wpa_supplicant.conf` (if relying on WiFi)
#
# ...here are the first important actions on first boot of the OS.

# Login to the Pi, using the default password 'raspberry': -

alanbchristie

# Fixed IP4 address are handy.
# To avoid DHCP you can set a fixed address
# by editing '/etc/dhcpcd.conf'.

#####
# 0 #
#####
# For newer RPi operatign systems (like Debian Bookworm)
# you might need to use this method: -
#

alanbchristie

# You'll need to patch the Pi's `/boot/cmdline.txt`
# by adding `cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1`
# to the end of the existing line (see https://github.com/k3s-io/k3s/issues/2067)
#
# i.e. `/boot/cmdline.txt` should look like something like this: -

console=serial0,115200 console=tty1 root=PARTUUID=b9075e12-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait cgroup_enable=cpuset cgroup_enable=memory cgroup_memory=1

# Reboot and you should be able to install k3s
# and its agents: -

alanbchristie

# Starting with a Pi flashed with 'Raspberry Pi OS Lite (32-bit)'
#
# I used the following:
#
# - Raspberry Pi 4 Model B Rev 1.1 (4Gi) [cat /proc/cpuinfo]
# - Debian 11.1 [cat /etc/debian_version]
# - Raspbian GNU/Linux 11 (bullseye) [cat /etc/os-release]
#
# And the instructions (pivpn) installs: -
#

alanbchristie

# The PiStation Case (for the Raspberry Pi 4)
# is a well built fun case, especially for those
# with a passion for retro-gaming consoles.
# Personally, I love it.
#
# - https://shop.pimoroni.com/products/pistation-case
#
# But installing the 'safe shutdown' feature may get you frustrated.
# The hardware's brilliant, but the shutdown script installation
# needs a little work. There are a number of

alanbchristie

# Simple No-ip.com Dynamic DNS Updater
#
# By Nathan Giesbrecht (http://nathangiesbrecht.com)
#
# 1) Install binary as described in no-ip.com's source file (assuming results in /usr/local/bin)
#    https://www.noip.com/support/knowledgebase/install-ip-duc-onto-raspberry-pi/
#
#    mkdir /home/pi/noip
#    cd /home/pi/noip
#    wget https://www.noip.com/client/linux/noip-duc-linux.tar.gz

alanbchristie

# The juice4halt super-capacitor board for the RaspberryPi
# can be configured to operate using systemd scripts.
# There are a set from https://github.com/skhg/juice4halt
# that I've forked to https://github.com/alanbchristie/juice4halt.
# To seup the follow the simple instructions in the repo, i.e. ...

sudo apt -y install git
git clone https://github.com/alanbchristie/juice4halt.git
cd juice4halt
sudo ./setup.sh

alanbchristie

#!/usr/bin/env python3
#
# Simple utility to watch the stats for a single docker container.
# It writes stats to two files 'max-cpu.txt' and 'max-mem.txt'
# for the maximum observed CPU and memory.
# The utility runs the stats every 60 seconds.
#
# Stats look like this...
#
# CONTAINER ID   NAME              CPU %     MEM USAGE / LIMIT     MEM %     NET I/O        BLOCK I/O        PIDS