Class: WindowsDaemon

Inherits:
Win32::Daemon
  • Object
show all
Defined in:
ext/windows/service/daemon.rb

Constant Summary collapse

CREATE_NEW_CONSOLE = 
0x00000010
LOG_FILE = 
File.expand_path(File.join(Dir::COMMON_APPDATA, 'PuppetLabs', 'puppet', 'var', 'log', 'windows.log'))
LEVELS = 
[:debug, :info, :notice, :warning, :err, :alert, :emerg, :crit]

Instance Method Summary collapse

Instance Method Details

#log(msg, level) ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 131

def log(msg, level)
  if LEVELS.index(level) >= @loglevel
    if (@LOG_TO_FILE)
      # without this change its possible that we get Encoding errors trying to write UTF-8 messages in current codepage
      File.open(LOG_FILE, 'a:UTF-8') { |f| f.puts("#{Time.now} Puppet (#{level}): #{msg}") }
    end

    native_type, native_id = Puppet::Util::Windows::EventLog.to_native(level)
    report_windows_event(native_type, native_id, msg.to_s)
  end
end

#log_exception(e) ⇒ Object

Interrogation handler is just for debug. Can be commented out or removed entirely. def service_interrogate

log_debug('Service is being interrogated')

end



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# File 'ext/windows/service/daemon.rb', line 126

def log_exception(e)
  log_err(e.message)
  log_err(e.backtrace.join("\n"))
end

#parse_log_level(puppet_path, cmdline_debug) ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 176

def parse_log_level(puppet_path,cmdline_debug)
  begin
    loglevel = %x{ #{puppet_path} config --section agent --log_level notice print log_level }.chomp
    unless loglevel && respond_to?("log_#{loglevel}")
      loglevel = :notice
      log_err("Failed to determine loglevel, defaulting to #{loglevel}")
    end
  rescue Exception => e
    log_exception(e)
    loglevel = :notice
  end

  LEVELS.index(cmdline_debug ? cmdline_debug : loglevel.to_sym)
end

#parse_runinterval(puppet_path) ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 161

def parse_runinterval(puppet_path)
  begin
    runinterval = %x{ #{puppet_path} config --section agent --log_level notice print runinterval }.to_i
    if runinterval == 0
      runinterval = 1800
      log_err("Failed to determine runinterval, defaulting to #{runinterval} seconds")
    end
  rescue Exception => e
    log_exception(e)
    runinterval = 1800
  end

  runinterval
end

#report_windows_event(type, id, message) ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 143

def report_windows_event(type,id,message)
  begin
    eventlog = nil
    eventlog = Puppet::Util::Windows::EventLog.open("Puppet")
    eventlog.report_event(
      :event_type  => type,   # EVENTLOG_ERROR_TYPE, etc
      :event_id    => id,     # 0x01 or 0x02, 0x03 etc.
      :data        => message # "the message"
    )
  rescue Exception
    # Ignore all errors
  ensure
    if (!eventlog.nil?)
      eventlog.close
    end
  end
end

#service_init ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 27

def service_init
end

#service_main(*argsv) ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 30

def service_main(*argsv)
  argsv = (argsv << ARGV).flatten.compact
  args = argsv.join(' ')
  @loglevel = LEVELS.index(argsv.index('--debug') ? :debug : :notice)

  @LOG_TO_FILE = (argsv.index('--logtofile') ? true : false)

  if (@LOG_TO_FILE)
    FileUtils.mkdir_p(File.dirname(LOG_FILE))
    args = args.gsub("--logtofile","")
  end

  base_dir = File.expand_path(File.join(File.dirname(__FILE__), '..'))
  load_env(base_dir)

  # The puppet installer registers a 'Puppet' event source.  For the moment events will be logged with this key, but
  # it may be a good idea to split the Service and Puppet events later so it's easier to read in the windows Event Log.
  #
  # Example code to register an event source;
  # eventlogdll =  File.expand_path(File.join(basedir, 'puppet', 'ext', 'windows', 'eventlog', 'puppetres.dll'))
  # if (File.exists?(eventlogdll))
  #   Win32::EventLog.add_event_source(
  #      'source' => "Application",
  #      'key_name' => "Puppet Agent",
  #      'category_count' => 3,
  #      'event_message_file' => eventlogdll,
  #      'category_message_file' => eventlogdll
  #   )
  # end

  puppet = File.join(base_dir, 'puppet', 'bin', 'puppet')
  ruby = File.join(base_dir, 'puppet', 'bin', 'ruby.exe')
  ruby_puppet_cmd = "\"#{ruby}\" \"#{puppet}\""

  unless File.exist?(puppet)
    log_err("File not found: '#{puppet}'")
    return
  end
  log_debug("Using '#{puppet}'")

  cmdline_debug = argsv.index('--debug') ? :debug : nil
  @loglevel = parse_log_level(ruby_puppet_cmd, cmdline_debug)
  log_notice('Service started')

  service = self
  @run_thread = Thread.new do
    begin
      while service.running? do
        runinterval = service.parse_runinterval(ruby_puppet_cmd)

        if service.state == RUNNING or service.state == IDLE
          service.log_notice("Executing agent with arguments: #{args}")
          pid = Process.create(:command_line => "#{ruby_puppet_cmd} agent --onetime #{args}", :creation_flags => CREATE_NEW_CONSOLE).process_id
          service.log_debug("Process created: #{pid}")
        else
          service.log_debug("Service is paused.  Not invoking Puppet agent")
        end

        service.log_debug("Service worker thread waiting for #{runinterval} seconds")
        sleep(runinterval)
        service.log_debug('Service worker thread woken up')
      end
    rescue Exception => e
      service.log_exception(e)
    end
  end
  @run_thread.join

rescue Exception => e
  log_exception(e)
ensure
  log_notice('Service stopped')
end

#service_pause ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 109

def service_pause
  log_notice('Service pausing')
end

#service_resume ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 113

def service_resume
  log_notice('Service resuming')
end

#service_shutdown ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 117

def service_shutdown
  log_notice('Host shutting down')
end

#service_stop ⇒ Object 



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# File 'ext/windows/service/daemon.rb', line 104

def service_stop
  log_notice('Service stopping / killing worker thread')
  @run_thread.kill if @run_thread
end