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#
# Author:: Phil Dibowitz <phil@ipom.com>
# Copyright:: Copyright (c) 2016 Facebook, 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.
#
require "digest/md5"
Ohai.plugin(:ShardSeed) do
depends "hostname", "dmi", "machine_id", "machinename"
provides "shard_seed"
def get_dmi_property(dmi, thing)
%w{system base_board chassis}.each do |section|
unless dmi[section][thing].strip.empty?
return dmi[section][thing]
end
end
end
def default_sources
[:machinename, :serial, :uuid]
end
# Common sources go here. Put sources that need to be different per-platform
# under their collect_data block.
def create_seed(&block)
sources = Ohai.config[:plugin][:shard_seed][:sources] || default_sources
data = ""
sources.each do |src|
data << case src
when :fqdn
fqdn
when :hostname
hostname
when :machine_id
machine_id
when :machinename
machinename
else
yield(src)
end
end
shard_seed Digest::MD5.hexdigest(data)[0...7].to_i(16)
end
collect_data(:darwin) do
create_seed do |src|
case src
when :serial
hardware["serial_number"]
when :uuid
hardware["platform_UUID"]
end
end
end
collect_data(:linux) do
create_seed do |src|
case src
when :serial
get_dmi_property(dmi, :serial_number)
when :uuid
get_dmi_property(dmi, :uuid)
else
raise "No such shard_seed source: #{src}"
end
end
end
end
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