Michael Kennedy merps

Setting up a Docker container as a DHCP server

In this guide I’ve tested a number of different commands and configurations using Docker to run a container with dhcpd (+macvlan driver) to serve my clients in my home network. In the end i’ll migrate from my Windows 2012 R2 Server running DHCP to a much more lightweight Docker container (7.42 MB in total). Wow.

My home environment:

Firewall (Juniper)
- I’m running IP helper for bootp which in this case means that i relay DHCP requests from various VLANs into one where i've placed my Windows 2012 R2 server. This is also where my container will live. See the FW configuration below:

Rationale

This snippet is a sample showing how to implement CloudWatch Logs streaming to ElasticSearch using terraform. I wrote this gist because I didn't found a clear, end-to-end example on how to achieve this task. In particular, I understood the resource "aws_lambda_permission" "cloudwatch_allow" part by reading a couple of bug reports plus this stackoverflow post.

The js file is actually the Lambda function automatically created by AWS when creating this pipeline through the web console. I only added a endpoint variable handling so it is configurable from terraform.

Pseudocode:

Y = Base64URLEncode(Header) + ‘.’ + Base64URLEncode(Payload)
JWT = Y + ‘.’ + Base64URLEncode(HMACSHA256(Y))

The steps called out here should work on a Mac as well. The only thing that might be different is the sed command used below. Instead of using -E, you will have to use -r to run sed with extended regular expression support

Use data from this tutorial:

scotch.io

Install the ELRepo and GPG key

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
yum install -y http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

Enable kernel updates from elrepo

yum-config-manager --enable elrepo-kernel

Markdown and reStructuredText

GitHub supports several lightweight markup languages for documentation; the most popular ones (generally, not just at GitHub) are Markdown and reStructuredText. Markdown is sometimes considered easier to use, and is often preferred when the purpose is simply to generate HTML. On the other hand, reStructuredText is more extensible and powerful, with native support (not just embedded HTML) for tables, as well as things like automatic generation of tables of contents.

	## --- BIQU Microprobe Klipper configuration ---
	# Not much different from a standard probe config. The
	# main difference compared to most probes is to disable
	# deactivating the probe (PROBE_UP) after each sample
	#
	# You can either copy pasta this directly or import
	# into your config.yml using [include microprobe.cfg]
	#
	# Note: if you are changing from a bltouch or one of its
	# clones, remove/comment out the [bltouch] config!

	# This file contains common pin mappings for the BIGTREETECH SKR mini
	# E3 v2.0. To use this config, the firmware should be compiled for the
	# STM32F103 with a "28KiB bootloader" and USB communication. Also,
	# select "Enable extra low-level configuration options" and configure
	# "GPIO pins to set at micro-controller startup" to "!PA14".

	# The "make flash" command does not work on the SKR mini E3. Instead,
	# after running "make", copy the generated "out/klipper.bin" file to a
	# file named "firmware.bin" on an SD card and then restart the SKR
	# mini E3 with that SD card.

	version: '2.1'
	services:
	grafana:
	container_name: grafana
	image: proxx/grafana-armv7
	user: "1000"
	ports:
	- 3000:3000
	volumes:
	- /opt/grafana:/etc/grafana:rw

	#!/usr/bin/env python

	# Import pif to get your public ip, sys and os.path
	import pif, sys, os.path

	# Partial imports
	from godaddypy import Client, Account

	# Remember to set your api key and secret
	userAccount = Account(api_key='api_key', api_secret='api_secret')