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#
# Author:: Adam Edwards (<adamed@chef.io>)
#
# Copyright:: Copyright 2014-2016, Chef Software, Inc.
#
# 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 "chef/util/powershell/cmdlet"
require "chef/util/dsc/lcm_output_parser"
class Chef::Util::DSC
class LocalConfigurationManager
def initialize(node, configuration_path)
@node = node
@configuration_path = configuration_path
clear_execution_time
end
def test_configuration(configuration_document, shellout_flags)
status = run_configuration_cmdlet(configuration_document, false, shellout_flags)
log_what_if_exception(status.stderr) unless status.succeeded?
configuration_update_required?(status.return_value)
end
def set_configuration(configuration_document, shellout_flags)
run_configuration_cmdlet(configuration_document, true, shellout_flags)
end
def last_operation_execution_time_seconds
if @operation_start_time && @operation_end_time
@operation_end_time - @operation_start_time
end
end
private
def run_configuration_cmdlet(configuration_document, apply_configuration, shellout_flags)
Chef::Log.debug("DSC: Calling DSC Local Config Manager to #{apply_configuration ? "set" : "test"} configuration document.")
start_operation_timing
status = nil
begin
save_configuration_document(configuration_document)
cmdlet = ::Chef::Util::Powershell::Cmdlet.new(@node, lcm_command(apply_configuration))
if apply_configuration
status = cmdlet.run!({}, shellout_flags)
else
status = cmdlet.run({}, shellout_flags)
end
ensure
end_operation_timing
remove_configuration_document
if last_operation_execution_time_seconds
Chef::Log.debug("DSC: DSC operation completed in #{last_operation_execution_time_seconds} seconds.")
end
end
Chef::Log.debug("DSC: Completed call to DSC Local Config Manager")
status
end
def lcm_command(apply_configuration)
common_command_prefix = "$ProgressPreference = 'SilentlyContinue';"
ps4_base_command = "#{common_command_prefix} Start-DscConfiguration -path #{@configuration_path} -wait -erroraction 'stop' -force"
if apply_configuration
ps4_base_command
else
if ps_version_gte_5?
"#{common_command_prefix} Test-DscConfiguration -path #{@configuration_path}"
else
ps4_base_command + " -whatif; if (! $?) { exit 1 }"
end
end
end
def ps_version_gte_5?
Chef::Platform.supported_powershell_version?(@node, 5)
end
def log_what_if_exception(what_if_exception_output)
if whatif_not_supported?(what_if_exception_output)
# LCM returns an error if any of the resources do not support the opptional What-If
Chef::Log.warn("Received error while testing configuration due to resource not supporting 'WhatIf'")
elsif dsc_module_import_failure?(what_if_exception_output)
Chef::Log.warn("Received error while testing configuration due to a module for an imported resource possibly not being fully installed:\n#{what_if_exception_output.gsub(/\s+/, ' ')}")
else
Chef::Log.warn("Received error while testing configuration:\n#{what_if_exception_output.gsub(/\s+/, ' ')}")
end
end
def whatif_not_supported?(what_if_exception_output)
!! (what_if_exception_output.gsub(/[\r\n]+/, "").gsub(/\s+/, " ") =~ /A parameter cannot be found that matches parameter name 'Whatif'/i)
end
def dsc_module_import_failure?(what_if_output)
!! (what_if_output =~ /\sCimException/ &&
what_if_output =~ /ProviderOperationExecutionFailure/ &&
what_if_output =~ /\smodule\s+is\s+installed/)
end
def configuration_update_required?(what_if_output)
Chef::Log.debug("DSC: DSC returned the following '-whatif' output from test operation:\n#{what_if_output}")
begin
Parser.parse(what_if_output)
rescue Chef::Exceptions::LCMParser => e
Chef::Log.warn("Could not parse LCM output: #{e}")
[Chef::Util::DSC::ResourceInfo.new("Unknown DSC Resources", true, ["Unknown changes because LCM output was not parsable."])]
end
end
def save_configuration_document(configuration_document)
::FileUtils.mkdir_p(@configuration_path)
::File.open(configuration_document_path, "wb") do |file|
file.write(configuration_document)
end
end
def remove_configuration_document
::FileUtils.rm(configuration_document_path)
end
def configuration_document_path
File.join(@configuration_path, "..mof")
end
def clear_execution_time
@operation_start_time = nil
@operation_end_time = nil
end
def start_operation_timing
clear_execution_time
@operation_start_time = Time.now
end
def end_operation_timing
@operation_end_time = Time.now
end
end
end
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