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#
# Author:: Christopher Maier (<maier@lambda.local>)
# Copyright:: Copyright (c) 2011 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.
#
require 'chef'
require 'chef/application'
require 'chef/client'
require 'chef/config'
require 'chef/handler/error_report'
require 'chef/log'
require 'chef/rest'
require 'mixlib/cli'
require 'socket'
require 'win32/daemon'
class Chef
class Application
class WindowsService < ::Win32::Daemon
include Mixlib::CLI
option :config_file,
:short => "-c CONFIG",
:long => "--config CONFIG",
:default => "#{ENV['SYSTEMDRIVE']}/chef/client.rb",
:description => ""
option :log_location,
:short => "-L LOGLOCATION",
:long => "--logfile LOGLOCATION",
:description => "Set the log file location",
:default => "#{ENV['SYSTEMDRIVE']}/chef/client.log"
option :splay,
:short => "-s SECONDS",
:long => "--splay SECONDS",
:description => "The splay time for running at intervals, in seconds",
:proc => lambda { |s| s.to_i }
option :interval,
:short => "-i SECONDS",
:long => "--interval SECONDS",
:description => "Set the number of seconds to wait between chef-client runs",
:proc => lambda { |s| s.to_i }
option :override_runlist,
:short => "-o RunlistItem,RunlistItem...",
:long => "--override-runlist RunlistItem,RunlistItem...",
:description => "Replace current run list with specified items",
:proc => lambda{|items|
items = items.split(',')
items.compact.map{|item|
Chef::RunList::RunListItem.new(item)
}
}
def service_init
reconfigure
Chef::Log.info("Chef Client Service initialized")
end
def service_main(*startup_parameters)
while running?
if state == RUNNING
begin
# Reconfigure each time through to pick up any changes in the client file
Chef::Log.info("Reconfiguring with startup parameters")
reconfigure(startup_parameters)
splay = rand Chef::Config[:splay]
Chef::Log.debug("Splay sleep #{splay} seconds")
sleep splay
# If we've stopped, then bail out now, instead of going on to run Chef
next if state != RUNNING
@chef_client = Chef::Client.new(
@chef_client_json,
:override_runlist => config[:override_runlist]
)
@chef_client_json = nil
@chef_client.run
@chef_client = nil
Chef::Log.debug("Sleeping for #{Chef::Config[:interval]} seconds")
client_sleep Chef::Config[:interval]
rescue Chef::Application::Wakeup => e
Chef::Log.debug("Received Wakeup signal. Starting run.")
next
rescue SystemExit => e
raise
rescue Exception => e
Chef::Log.error("#{e.class}: #{e}")
Chef::Application.debug_stacktrace(e)
Chef::Log.error("Sleeping for #{Chef::Config[:interval]} seconds before trying again")
client_sleep Chef::Config[:interval]
retry
end
else # PAUSED or IDLE
sleep 5
end
end
end
################################################################################
# Control Signal Callback Methods
################################################################################
def service_stop
Chef::Log.info("SERVICE_CONTROL_STOP received, stopping")
end
def service_pause
Chef::Log.info("SERVICE_CONTROL_PAUSE received, pausing")
end
def service_resume
Chef::Log.info("SERVICE_CONTROL_CONTINUE received, resuming")
end
def service_shutdown
Chef::Log.info("SERVICE_CONTROL_SHUTDOWN received, shutting down")
end
################################################################################
# Internal Methods
################################################################################
private
def apply_config(config_file_path)
Chef::Config.from_file(config_file_path)
Chef::Config.merge!(config)
end
# Lifted from Chef::Application, with addition of optional startup parameters
# for playing nicely with Windows Services
def reconfigure(startup_parameters=[])
configure_chef startup_parameters
configure_logging
Chef::Config[:chef_server_url] = config[:chef_server_url] if config.has_key? :chef_server_url
unless Chef::Config[:exception_handlers].any? {|h| Chef::Handler::ErrorReport === h}
Chef::Config[:exception_handlers] << Chef::Handler::ErrorReport.new
end
Chef::Config[:interval] ||= 1800
end
# Lifted from Chef::Application and Chef::Application::Client
# MUST BE RUN AFTER configuration has been parsed!
def configure_logging
# Implementation from Chef::Application
Chef::Log.init(Chef::Config[:log_location])
Chef::Log.level = Chef::Config[:log_level]
# Implementation from Chef::Application::Client
Mixlib::Authentication::Log.use_log_devices( Chef::Log )
Ohai::Log.use_log_devices( Chef::Log )
end
def configure_chef(startup_parameters)
# Bit of a hack ahead:
# It is possible to specify a service's binary_path_name with arguments, like "foo.exe -x argX".
# It is also possible to specify startup parameters separately, either via the the Services manager
# or by using the registry (I think).
# In order to accommodate all possible sources of parameterization, we first parse any command line
# arguments. We then parse any startup parameters. This works, because Mixlib::CLI reuses its internal
# 'config' hash; thus, anything in startup parameters will override any command line parameters that
# might be set via the service's binary_path_name
#
# All these parameters then get layered on top of those from Chef::Config
parse_options # Operates on ARGV by default
parse_options startup_parameters
begin
case config[:config_file]
when /^(http|https):\/\//
Chef::REST.new("", nil, nil).fetch(config[:config_file]) { |f| apply_config(f.path) }
else
::File::open(config[:config_file]) { |f| apply_config(f.path) }
end
rescue Errno::ENOENT => error
Chef::Log.warn("*****************************************")
Chef::Log.warn("Did not find config file: #{config[:config_file]}, using command line options.")
Chef::Log.warn("*****************************************")
Chef::Config.merge!(config)
rescue SocketError => error
Chef::Application.fatal!("Error getting config file #{Chef::Config[:config_file]}", 2)
rescue Chef::Exceptions::ConfigurationError => error
Chef::Application.fatal!("Error processing config file #{Chef::Config[:config_file]} with error #{error.message}", 2)
rescue Exception => error
Chef::Application.fatal!("Unknown error processing config file #{Chef::Config[:config_file]} with error #{error.message}", 2)
end
end
# Since we need to be able to respond to signals between Chef runs, we need to periodically
# wake up to see if we're still in the running state. The method returns when it has slept
# for +sec+ seconds (but at least +10+ seconds), or when the service
# is no client_sleep in the +RUNNING+ state, whichever comes first.
def client_sleep(sec)
chunk_length = 10
chunks = sec / chunk_length
chunks = 1 if chunks < 1
(1..chunks).each do
return unless state == RUNNING
sleep chunk_length
end
end
end
end
end
# To run this file as a service, it must be called as a script from within
# the Windows Service framework. In that case, kick off the main loop!
if __FILE__ == $0
Chef::Application::WindowsService.mainloop
end
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