brightbox-ohai.rb

#
# Author:: Tim Dysinger (<tim@dysinger.net>)
# Author:: Benjamin Black (<bb@opscode.com>)
# Author:: Christopher Brown (<cb@opscode.com>)
# Copyright:: Copyright (c) 2009 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

provides "brightbox"

require 'ohai/mixin/ec2_metadata'

require_plugin "hostname"
require_plugin "kernel"
require_plugin "network"

EC2_METADATA_URL = "/2009-04-04/meta-data"
EC2_USERDATA_URL = "/2009-04-04/user-data"

extend Ohai::Mixin::Ec2Metadata

def has_brightbox_mac?
  network[:interfaces].values.each do |iface|
    unless iface[:arp].nil?
      if iface[:arp].any? {|k,v| v =~/^52:54:00:([0-9A-F]{2}[:-]){2}([0-9A-F]{2})$/i }
        Ohai::Log.debug("has_brightbox_mac? == true")
        return true
      end
    end
  end
  Ohai::Log.debug("has_brightbox_mac? == false")
  false
end

def looks_like_brightbox?
  # Try non-blocking connect so we don't "block" if
  # the Xen environment is *not* EC2
  hint?('brightbox') || has_brightbox_mac? && can_metadata_connect?(EC2_METADATA_ADDR,80)
end

if looks_like_brightbox?
  Ohai::Log.debug("looks_like_brightbox? == true")
  brightbox Mash.new
  fetch_metadata.each {|k, v| brightbox[k] = v }
else
  Ohai::Log.debug("looks_like_brightbox? == false")
  false
end

def fetch_metadata(id='')
  metadata = Hash.new

  `ec2metadata`.chomp.split("\n").each do |date|
    key, value = date.split(": ")
    if value.start_with? "[" and value.end_with? "]"
      metadata[metadata_key(key)] = value.scan(/'([^']*)'/).flatten
    elsif key == "security-groups"
      metadata[metadata_key(key)] = value.split(" ")
    else
      metadata[metadata_key(key)] = value unless value == "unavailable"
    end

  end

  metadata
end