Blog

Keep Route53 Health check source IP's up to date

We wanted to add Route53 health checks for some of our DNS end points but the list of origin IP's for these checks is not guaranteed. This being the case we pu

Dynamic Access Control Allow Origin header in HAProxy

In order to support Preflight CORS request in HAProxy you need to return the correct Access-Control-Allow-Origin header in the response. This should contain th

Get a quick list of all AWS instances using JQ and AWS Cli

Today I needed to get a quick list of all my AWS instances, and rather then try to copy and paste from the aweful AWS web UI I figured I would go the manly rout

IPSEC VPN for connection multiple AWS VPC's

Getting a VPN working to connect multiple regions is actually pretty simple. I'll lay out the step's I used to get this working and hopefully it helps someone

Ohai, Vagrant and eth1... Making them work in harmony

Unfortunately Vagrant deployments always have the NAT adapter on eth0, which can cause headaches at times, especially when doing a multiVM deployment! Most of t

Showing restarts in Graphite using uptime

Currently we use CollectD’s [uptime][collectd-uptime] plugin to track system uptime. We then use [Curl-Json][collectd-curl-json] along with [Jolokia][jolokia] t

Creating a release RPM

Here is an example of a release RPM we used for a project

Using SOX to batch convert audio files

The Plain old telephone service (POTS) we are all used to is almost a hundred years old so when it comes to audio codecs you get pretty much the bottom of the b

Using Nagios to monitor Tropo

So I will start by saying that Tropo maintains a very redundant, and fault tollerent network, however we do understand that people still need to do their due di

Installing Asterisk 10.3 on OSX Lion

So I had a need to install Asterisk the other day on my laptop and doing the atypical:

API for AWS pricing

Looking for an easy way to get AWS pricing programitcaially? Just use the following three URI’s to get a JSON feed of transfer costs, as well as Reserved and On

TinyTDS & OSX 10.7

Installing ELB command line tools on OSX / Linux

The ELB command line tools are pretty nice, and they are actually required to get a lot of important information which is unfortunately missing from the AWS ELB

Print letters up to n in Ruby

Had a case the other day where I needed to create users accounts in a specific fashion. If I had less then 25 users I would use letters for the test accounts (e

Upgrade Chef server to 0.10.8

Upgrading to Chef Server ( 0.10.8 ) is dead simple, takes probably 30 seconds.

Dynamic templates based on search results

So here is my use case, I have a two nodes which have to be configured to know about each other, but I can’t use multicast, and I want to be elastic, in that I

Query Chef's RestAPI using Spice

Dan Ryan has an awesome gem on Github called Spice , which is a nice wrapper to the Chef Severs RestAPI. The one thing I didn’t find clearly documented was how