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#
# Author:: Ranjib Dey (<dey.ranjib@google.com>)
# 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.
Ohai.plugin(:GCE) do
require "ohai/mixin/gce_metadata"
require "ohai/mixin/http_helper"
include Ohai::Mixin::GCEMetadata
include Ohai::Mixin::HttpHelper
provides "gce"
# look for GCE string in dmi vendor bios data within the sys tree.
# this works even if the system lacks dmidecode use by the Dmi plugin
# @return [Boolean] do we have Google Compute Engine DMI data?
def has_gce_dmi?
if file_val_if_exists("/sys/class/dmi/id/product_name") =~ /Google Compute Engine/
logger.trace("Plugin GCE: has_gce_dmi? == true")
true
else
logger.trace("Plugin GCE: has_gce_dmi? == false")
false
end
end
# return the contents of a file if the file exists
# @param path[String] abs path to the file
# @return [String] contents of the file if it exists
def file_val_if_exists(path)
if ::File.exist?(path)
::File.read(path)
end
end
# looks at the Manufacturer and Model WMI values to see if they starts with Google.
# @return [Boolean] Are the manufacturer and model Google?
def has_gce_system_info?
if RUBY_PLATFORM =~ /mswin|mingw32|windows/
require "wmi-lite/wmi"
wmi = WmiLite::Wmi.new
computer_system = wmi.first_of("Win32_ComputerSystem")
if computer_system["Manufacturer"] =~ /^Google/ && computer_system["Model"] =~ /^Google/
logger.trace("Plugin GCE: has_gce_system_info? == true")
return true
end
else
logger.trace("Plugin GCE: has_gce_system_info? == false")
false
end
end
# Identifies gce
#
# === Return
# true:: If gce can be identified
# false:: Otherwise
def looks_like_gce?
return true if hint?("gce")
if has_gce_dmi? || has_gce_system_info?
return true if can_socket_connect?(Ohai::Mixin::GCEMetadata::GCE_METADATA_ADDR, 80)
end
end
collect_data do
if looks_like_gce?
logger.trace("Plugin GCE: looks_like_gce? == true")
gce Mash.new
fetch_metadata.each { |k, v| gce[k] = v }
else
logger.trace("Plugin GCE: looks_like_gce? == false")
false
end
end
end
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