btm

service "apache2" do
  name value_for_platform(
    [ "CentOS", "RedHat", "Fedora", "SuSE" ] => { "default" => "httpd" },
    "Debian" => { "default" => "apache2" },
    "Ubuntu" => { "default" => "apache2", "8.10" => "apache2_lolz" }
  )
  supports :restart => true
  action :enable
end

btm

require 'rubygems'
require 'nokogiri'
require 'json'

minimal = {
	'name' => 'minimal_vm',
	'memory' => 512,
	'hd' => '/var/lib/libvirt/images/fc10-x86-64-xen.img',
	'cdrom' => '/home/bb/os_images/Fedora-10-x86_64-DVD.iso',
	'boot' => ['hd', 'cdrom']

btm

Installing Ohai on Windows:

Install Ruby via one-click installer (I used ruby186-27_rc)
  http://rubyforge.org/frs/download.php/47082/ruby186-27_rc2.exe

Start the RubyGems Package Manager
  Programs -> Ruby-186-27 -> RubyGems -> RubyGems Package Manager

Add gems.opscode.com to gem sources.
  C:\Ruby>gem sources -a http://gems.opscode.com

btm

About the test system (debian5test):

$ cat /etc/debian_version 
5.0.2
$ dpkg -l stompserver libnet-stomp-perl perl ruby 
ii  libnet-stomp-perl     0.34-1                A Streaming Text Orientated Messaging Protocol Client
ii  perl                  5.10.0-24             Larry Wall's Practical Extraction and Report Language
ii  ruby                  4.2                   An interpreter of object-oriented scripting language Ruby
ii  stompserver           0.9.9-1               a stomp messaging server implemented in ruby

btm

if platform?("ubuntu")
  bash "add_mehnat" do
    code <<-EOH
      echo 'deb http://packages.mehnat.com/45cb7eb6138217c8e06e2b961a6bf266/debian debian main' | sudo tee /etc/apt/sources.list.d/mehnat.list > /dev/null
      curl http://packages.mehnat.com/mehnat.packages.key | sudo apt-key add - 
      sudo apt-get update
    EOH
  end
end

btm

      def configure_session
        list = case config[:manual]
               when true
                 @name_args[0].split(" ")
               when false
                 r = Array.new
                 q = Chef::Search::Query.new
                 @action_nodes = q.search(:node, @name_args[0])[0]
                 @action_nodes.each do |item|
                   # we should skip the loop to next iteration if the item returned by the search is nil

btm

# If the host has ganglia in the run_list, install the mongo plugin
# In Chef 11 node.recipe? returns true for the run_list and expanded_runlist (node[:recipes])
# In Chef 10 node.recipe? returns true for the run_list and already loaded recipes (seen_recipes)
#  -- I believe on Chef 10 node.recipe? does not evaluated the expanded run_list so you want node[:recipes] too
if node.recipe?("ganglia::default") or node[:recipes].include?("ganglia::default")
  # Make sure we've already executed the ganglia recipe in this run to get the ganglia_python LWRP
  include_recipe "ganglia::default"
  ganglia_python "mongodb" do
    action :enable
  end

btm

Ohai.plugin(:Mdadm) do
  provides 'mdadm'

  def create_raid_device_mash(stdout)
    device_mash = Mash.new
    device_mash[:device_counts] = Mash.new
    stdout.each do |line|
      case line
      when /Version\s+: ([0-9.]+)/
        device_mash[:version] = Regexp.last_match[1].to_f