Alex Ellis alexellis

Raspberry 4B - Boot from SD and rootfs on USB

Update

RPi4 now supports booting directly from USB. First update to get an eeprom which supports USB Boot, then configure the bootloader to boot from USB.

Original guide

Download Raspbian from the official site

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Update: This gist has graduated to a full blog post over on my site -> https://blog.alexellis.io/get-private-kubectl-access-anywhere/

Get `kubectl` access to your private cluster from anywhere

This tutorial shows you how to punch your private Kubernetes API server out to the Internet, so that you can manage your cluster from anywhere, just like you would with a cloud offering.

These steps have been tested with kubeadm, k3s and OpenShift.

You'll need:

pull an image

root@ubu1804vm:~# ctr image pull docker.io/library/redis:latest
docker.io/library/redis:latest:                                                   resolved       |+++++++++++++++++++++++++++++++docker.io/library/redis:latest:                                                   resolved       |++++++++++++++++++++++++++++++++++++++|
index-sha256:ddf831632db1a51716aa9c2e9b6a52f5035fc6fa98a8a6708f6e83033a49508d:    done           |++++++++++++++++++++++++++++++++++++++|
manifest-sha256:780f7dacdc133e899fba9ff09c099828b469030acefe6f3bbc16197b55800cfd: done           |++++++++++++++++++++++++++++++++++++++|
layer-sha256:75797de34ea7abaf8ebd484896a21f5bda63ffbcade7217dad0be0b8b8333bde:    done           |++++++++++++++++++++++++++++++++++++++|
config-sha256:f0453552d7f26fc38ffc05fa034aa7a7bc6fbb01bc7bc5a9e4b3c0ab87068627:   done           |++++++++++++++++++++++++++++++++++++++|
layer-sha256:68ced04f60ab5c7a5f1d0b0b4e7572c5a4c8cce44866513d30d9df1a15277d6b:    done           |+++++++++++++++++++++

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

Installing OpenFaaS with libkrun-based isolation on Fedora 33

Setting up the system

Revert to cgroup v1

The version of containerd that OpenFaaS will download during the installation doesn't support cgroup v2, so we need to configure systemd to avoid using the Unified cgroup Hierarchy, and reboot the system:

CNI SNIFFER

The Container Networking Interface, or CNI, is a generic plugin-based networking solution for configuring the network on containers.

The CNI specification defines:

A format for administrators to define network configuration.
A protocol for container runtimes to make requests to network plugins.
A procedure for executing plugins based on a supplied configuration.
A procedure for plugins to delegate functionality to other plugins.

	#!/usr/bin/env bash

	# script was taken from https://gist.github.com/innovia/fbba8259042f71db98ea8d4ad19bd708 and adjusted with "apply_rbac" function and colorized output


	set -e
	set -o pipefail

	# Colors
	RED="\e[01;31m"

	#! /bin/sh

	logo () {
	echo ""
	echo " ▄██▄"
	echo " ▄█ █▄"
	echo " ▄█ █▄"
	echo " ▄▄▄▄█ ▄▄▄ █▄"
	echo " ▄█▀▀▀ ▄█ ▀██▄"
	echo " ▄█▀ ▄█ ▀█▄"

	module forward

	go 1.14

	require (
	github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 // indirect
	github.com/gliderlabs/ssh v0.3.0
	golang.org/x/crypto v0.0.0-20200406173513-056763e48d71
	)