Three Drunken SysAds

Linux, Opensource, Devops and randomness…

Browsing Posts published by ProfFalken

I’ve been playing with Puppet for some time now and creating the directory structure for modules as defined in the puppet best practice guide gets tedious after a while, so I threw together a simply base script that takes a single argument and builds the directory structure for you.

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One of my main gripes with Centos/Redhat is the insistence to use sendmail as the default MTA when something as beautiful as Exim exists and provides far greater flexibility.

Thanks to the folks at atrpms, it is possible to install Exim 4.71 on Centos 5 with the following steps:

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Table of contents for Adventures with Mcollective

  1. Adventures with MCollective
  2. Mcollective on Centos
  3. Create a local repository for MCollective and ActiveMQ

OK, so I might have been a bit hasty to dismiss Centos in my last post – a couple of people have contacted me and told me about additional repos that I can use for rubygems etc – so as a brief interlude, here’s the instructions for getting MCollective and ActiveMQ up and running on Centos 5:

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Table of contents for Adventures with Mcollective

  1. Adventures with MCollective
  2. Mcollective on Centos
  3. Create a local repository for MCollective and ActiveMQ

A few weeks ago I was at UKUUG and met an intriguing project (and it’s owner) called mcollective.

MCollective is a system that enables you to run queries across multiple servers in real time and have the responses come back to you in a speed you would only expect if you were physically at the console.  In other words:- it’s f**king quick!

This post sets out to show you how to install it on Ubuntu Server (the instructions should apply to both 9.10 and 10.04 RC), the next set in the series will help you get it up and running across multiple machines!

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There are a few dependencies that need to be installed before cucumber-nagios will work correctly:

  1. Install RubyGems from source.  Trust me, you’ll thank me for this later
  2. install ruby, irb, rdoc and ruby-dev from Apt using your favourite package manager
  3. install libxslt-dev, libxslt-ruby and libopenssl-ruby from Apt
  4. install cucumber-nagios using GEM

And that’s about it…

OK, so I’m not the first to blog about this, however I’m using cobbler and puppet to automate the creation of VMs on my laptop for testing/staging purposes so I thought I’d blog about it here.

The aim is to use Cobbler to setup the base operating system and install puppet, then let Puppet take over and install and configure the rest of the system.

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Twitter has the latest updates on safe-proxy servers for those inside IRAN wishing to get out and publish about the current events.

Current list is as follows (19:48 on Monday 15th June 2009):

218.128.112.18:8080
218.206.94.132:808
218.253.65.99:808
219.50.16.70:8080

WHOIS reveals that these IP addresses are NOT inside IRAN and therefore are unlikely to be shut down as part of the signal jamming referred to in a bbc post found @ http://bit.ly/11YBNo

If you want to help, search for #Iranelection @ http://search.twitter.com/search?q=%23Iranelection

There are calls for a DDOS on the Iranian Gov’t Servers. I think this is a bad idea as it is using fire to fight fire IMHO.

[UPDATE]

http://twitter.com/#search?q=%22Functioning%20Iran%22  <– follow this tag for the list of functioning IRAN proxies.

Just a quick post…

In the last two parts of this series I stated I’d be using Ethernet over Powerline (aka HomePlug) as the backbone for my media system.

I currently own two 14Mbps units and tests have rapidly shown that this is nowhere near good enough.  Looks like I’ll have to upgrade to the 200Mbps units once I get paid and hope that it makes a difference.  If it doesn’t, I think I’m going to have to go down the route of Wireless-AP’s flashed with OpenWRT and acting as bridge devices to get the DHCP/TFTP working for the media directors.

Hmmm, PXE over a flakey wireless CX – not good… :o(

In part one of this series, I outlined LinuxMCE and how amazing it was providing Home Cinema, VoIP Telephony, CCTV and home automation in one system for the price of a download and a few hours work.  This article will help those who, like me, live in rented accomodation or cannot ask their local electrician to come and channel cabling ducts into the walls for some other reason, yet need to have a solid network cable running throughout the house.

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I’ve been playing around with Home Automation and trying to get my audio/video around the house without honey-combing the walls for the last few years with varying degrees of luck and in this time I’ve looked at a number of solutions including proprietary hardware (too expensive!!), Microsoft Windows Media Centre Edition (expensive and it runs on Windows…) and MythTV/Music Player Daemon (free, but not always the easiest to get it working!

Two years ago, I found Pluto Home – a commercial solution that had an open-source base and ran on Debian.  I played with it for a bit as the feature set was amazing (TV, Video, Audio and CCTV anywhere in the house as well as integrated VoIP telephony and some really cool stuff) but I ran out of spare time to explore it further.  I’ve started to look into Home Automation and Media again and this time, instead of using Pluto Home, I’ve decided to settle for LinuxMCE. It’s based on pluto home and Ubuntu and there’s been a lot of development since I was using Pluto…

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