Nicolas Hug KrustyHack

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Step By Step Guide to Configure a CoreOS Cluster From Scratch

This guide describes how to bootstrap new Production Core OS Cluster as High Availability Service in a 15 minutes with using etcd2, Fleet, Flannel, Confd, Nginx Balancer and Docker.

Content

Introduction
- Tools Used
Basic Configuration

This Cloud-init script can be used to bootstrap a Xen based CoreOS server through Xen orchestra.

Features;

Workaround for the lack of /etc/environment on 'unsupported' hypervisors
Static IP allocation to deal with dhcp causing problems (On my network at least)
etcd2 bootstrap discovery using public service and discovery tokens
1. Manual reconfiguration to allow for membership changes after cluster is operational

	import os
	import sys
	import re
	import boto3
	import zipfile

	def parse_s3_uri(url):
	match = re.search('^s3://([^/]+)/(.+)', url)
	if match:
	return match.group(1), match.group(2)

	#!/bin/bash
	#
	# Download latest Terraform release and install it in ~/.bin/
	#

	TMP_DIR=/tmp/terraform
	BIN_DIR=~/.bin

	LATEST_RELEASE=$(curl -Ss https://api.github.com/repos/hashicorp/terraform/releases/latest \| jq --raw-output '.tag_name' \| cut -c 2-)

	#!/bin/bash

	# Configuration for the script
	POSTFIX_CONFIG=/etc/postfix/main.cf
	POSTFIX_SASL=/etc/postfix/sasl_passwd

	function confirm () {
	read -r -p "${1:-Are you sure? [Y/n]} " response
	if [[ $response == "" \|\| $response == "y" \|\| $response == "Y" ]]; then
	echo 0;

	#!/bin/sh
	# ------------------------------------------------------------------------------
	# SOME INFOS : fairly standard (debian) init script.
	# Note that node doesn't create a PID file (hence --make-pidfile)
	# has to be run in the background (hence --background)
	# and NOT as root (hence --chuid)
	#
	# MORE INFOS : INIT SCRIPT http://www.debian.org/doc/debian-policy/ch-opersys.html#s-sysvinit
	# INIT-INFO RULES http://wiki.debian.org/LSBInitScripts
	# INSTALL/REMOVE http://www.debian-administration.org/articles/28

	<!doctype html>
	<title>Site Maintenance</title>
	<style>
	body { text-align: center; padding: 150px; }
	h1 { font-size: 50px; }
	body { font: 20px Helvetica, sans-serif; color: #333; }
	article { display: block; text-align: left; width: 650px; margin: 0 auto; }
	a { color: #dc8100; text-decoration: none; }
	a:hover { color: #333; text-decoration: none; }
	</style>

Nicolas Hug KrustyHack

tmux shortcuts & cheatsheet

Step By Step Guide to Configure a CoreOS Cluster From Scratch

Content

Usage