Toby Jackson warmfusion

Obtaining cipher list from OpenSSL 0.9.8zg 14 July 2015.
Testing ADH-SEED-SHA                   NO (sslv3 alert handshake failure)
Testing DHE-RSA-SEED-SHA               NO (sslv3 alert handshake failure)
Testing DHE-DSS-SEED-SHA               NO (sslv3 alert handshake failure)
Testing SEED-SHA                       NO (sslv3 alert handshake failure)
Testing ADH-AES256-SHA                 NO (sslv3 alert handshake failure)
Testing DHE-RSA-AES256-SHA             YES
Testing DHE-DSS-AES256-SHA             NO (sslv3 alert handshake failure)
Testing AES256-SHA                     NO (sslv3 alert handshake failure)

High availability monitoring with Sensu

sensu | May 8, 2013

Redundancy. Availability. Scalability. Should sound familiar to you if you work in the web. Every system I build has to fit those 3 main criterias. I would also throw in manageability. If I can’t use Chef with it, I’m probably trying to use the wrong tool for the job.

There’s always been one exception though: my monitoring tool. Nagios. Zabbix. Zenoss. Shinken. Used them all. Each of them have shortcomings when it comes to the four criterias listed above. Different ones for each.

So, that said, a few months back, I was searching for something fresh. Something I could easily manage with Chef. Because I tend to forget things, and I wanted to automate as much as possible our monitoring solution. Don’t get me wrong, there’s nothing as good as developers to monitor your stuff, but I tend to like to know there’s something wrong before they show up at my desk. Even if it’s only 1-2 minutes ;)

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

Usage

The following documents a trial of using etcd, and confd to automatically configure a haproxy load balancer.

It is built using a combination of blogs, resources and experimentation, but provides a rough template of the approach that would allow a fully featured balancer to be configured from etcd keyvalues.

TODO

Include systemd sidekick unit to automatically register the key's into ETCD based on a docker service (for example) being started
A more complete haproxy template that builds a valid, complex haproxy that would be capable of dealing with Future PLC's balancer requirements

When testing for two labels being required within a deployment, if either match passes the whole block is accepted.

deny[msg] {
  input.kind = "Deployment"
  not input.spec.selector.matchLabels.app
  not input.spec.selector.matchLabels.release
  msg = sprintf("Deployment[%s] - Containers must provide app/release labls for pod selectors", [name])
}

	#!/usr/bin/env ruby
	#
	# Author: Toby Jackson
	# Date: 2015-08-11
	#
	# Usage:
	# Add as mutator to a graphitehandler (which accepts all severities)
	# to create a new graphite metric for $hostname.$checkname with
	# each status value

	require 'ws2801'

	WS2801.generate # generate empty strip (Would happen from alone if you just start setting colors)

	WS2801.length 12 # default
	WS2801.device "/dev/spidev0.0" # default
	WS2801.strip []
	WS2801.autowrite true # default

	# Build initially using instalinux.com
	# and adapted with customisations for a two volume server on
	# XenServer to automatically provision a 100% LVM mounted to /var/lib/mysql

	####################################################################
	# PRESEED - Created Mon Sep 5 12:23:52 2016
	####################################################################

	# Wiki: http://wiki.debian.org/DebianInstaller/Preseed
	# Great work! Thanks for preseed and the d-i installer

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="utf-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
	<meta name="viewport" content="width=device-width">
	<meta name="theme-color" content="#000">

	<title>Grafana</title>

	[
	{ "keys": ["command+shift+r"], "command": "reveal_in_side_bar"}
	]