Art Peel whenceforth

These are notes for my Kubernetes/Prometheus workshop. The notes for the Prometheus introduction workshop can be found here.

The first part of this workshop is taken from episode 001 of the excellent TGI Kubernetes series by Heptio.

The demo runs on AWS.

Preparation (before the workshop)

Before the demo, do the following:

These are notes for my Prometheus workshop. The follow-up workshop on Prometheus/Kubernetes can be found here.

node_exporter

Your blockchain must have all of the following properties:

It's a merkle tree, or a construct with equivalent properties.
There is no single point of trust or authority; nodes are operated by different parties.
Multiple 'forks' of the blockchain may exist - that is, nodes may disagree on what the full sequence of blocks looks like.
In the case of such a fork, there must exist a deterministic consensus algorithm of some sort to decide what the "real" blockchain looks like (ie. which fork is "correct").
The consensus algorithm must be executable with only the information contained in the blockchain (or its forks), and no external input (eg. no decisionmaking from a centralized 'trust node').

If your blockchain is missing any of the above properties, it is not a blockchain, it is just a ledger.

	# Make coding more python3-ish
	from __future__ import (absolute_import, division, print_function)

	from abc import ABCMeta
	from array import array
	from base64 import b64encode, b64decode
	from Crypto import Random
	from Crypto.Cipher import AES
	from Crypto.Hash import SHA256

	@startuml fancy
	skinparam sequence {
	LifeLineBorderColor Green
	ArrowColor black
	ParticipantBorderColor black
	ParticipantBackgroundColor GreenYellow
	ParticipantFontColor black
	}
	skinparam actor {
	backgroundColor white

	# Tested on OSX Yosemite 10.10.4
	# there is also an updated version (work in progress) for El Capitan here https://gist.github.com/guycalledseven/31ffe35eca056838b06b

	# XXX TODO
	# should I disable com.google.Keystone.Agent ??
	# http://applehelpwriter.com/2014/07/13/how-to-remove-googles-secret-update-software-from-your-mac/


	# Stop DS_Store file creation on network connections
	# restart Finder afterwards

	public class SSLProtocolTests {
	public static void main(String[] args) throws Exception {
	SSLContext context = SSLContext.getDefault();
	SSLSocketFactory factory = (SSLSocketFactory)context.getSocketFactory();
	SSLSocket socket = (SSLSocket)factory.createSocket();

	String[] protocols = socket.getSupportedProtocols();

	System.out.println("Supported Protocols: " + protocols.length);
	for(int i = 0; i < protocols.length; i++)

	#!/bin/sh

	# Some things taken from here
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

	# Set the colours you can use
	black='\033[0;30m'
	white='\033[0;37m'
	red='\033[0;31m'
	green='\033[0;32m'