Class: Chef::Application::Client

Inherits:
Chef::Application show all
Defined in:
lib/chef/application/client.rb

Constant Summary collapse

SELF_PIPE =

Mimic self_pipe sleep from Unicorn to capture signals safely

[]

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Chef::Application

#configure_chef, debug_stacktrace, exit!, fatal!, #run

Constructor Details

#initializeClient

Returns a new instance of Client



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# File 'lib/chef/application/client.rb', line 146

def initialize
  super

  @chef_client = nil
  @chef_client_json = nil
end

Instance Attribute Details

#chef_client_jsonObject (readonly)

Returns the value of attribute chef_client_json



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# File 'lib/chef/application/client.rb', line 144

def chef_client_json
  @chef_client_json
end

Instance Method Details

#configure_loggingObject



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# File 'lib/chef/application/client.rb', line 200

def configure_logging
  super
  Mixlib::Authentication::Log.use_log_devices( Chef::Log )
  Ohai::Log.use_log_devices( Chef::Log )
end

#reconfigureObject

Reconfigure the chef client Re-open the JSON attributes and load them into the node



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# File 'lib/chef/application/client.rb', line 155

def reconfigure
  super

  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

  if Chef::Config[:daemonize]
    Chef::Config[:interval] ||= 1800
  end

  if Chef::Config[:once]
    Chef::Config[:interval] = nil
    Chef::Config[:splay] = nil
  end

  if Chef::Config[:json_attribs]
    begin
      json_io = case Chef::Config[:json_attribs]
                when /^(http|https):\/\//
                  @rest = Chef::REST.new(Chef::Config[:json_attribs], nil, nil)
                  @rest.get_rest(Chef::Config[:json_attribs], true).open
                else
                  open(Chef::Config[:json_attribs])
                end
    rescue SocketError => error
      Chef::Application.fatal!("I cannot connect to #{Chef::Config[:json_attribs]}", 2)
    rescue Errno::ENOENT => error
      Chef::Application.fatal!("I cannot find #{Chef::Config[:json_attribs]}", 2)
    rescue Errno::EACCES => error
      Chef::Application.fatal!("Permissions are incorrect on #{Chef::Config[:json_attribs]}. Please chmod a+r #{Chef::Config[:json_attribs]}", 2)
    rescue Exception => error
      Chef::Application.fatal!("Got an unexpected error reading #{Chef::Config[:json_attribs]}: #{error.message}", 2)
    end

    begin
      @chef_client_json = Chef::JSONCompat.from_json(json_io.read)
      json_io.close unless json_io.closed?
    rescue JSON::ParserError => error
      Chef::Application.fatal!("Could not parse the provided JSON file (#{Chef::Config[:json_attribs]})!: " + error.message, 2)
    end
  end
end

#run_applicationObject

Run the chef client, optionally daemonizing or looping at intervals.



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# File 'lib/chef/application/client.rb', line 211

def run_application
  unless RUBY_PLATFORM =~ /mswin|mingw32|windows/
    SELF_PIPE.replace IO.pipe

    trap("USR1") do
      Chef::Log.info("SIGUSR1 received, waking up")
      SELF_PIPE[1].putc('.') # wakeup master process from select
    end
  end

  if Chef::Config[:version]
    puts "Chef version: #{::Chef::VERSION}"
  end

  if Chef::Config[:daemonize]
    Chef::Daemon.daemonize("chef-client")
  end

  loop do
    begin
      if Chef::Config[:splay]
        splay = rand Chef::Config[:splay]
        Chef::Log.debug("Splay sleep #{splay} seconds")
        sleep splay
      end
      @chef_client = Chef::Client.new(@chef_client_json)
      @chef_client_json = nil

      @chef_client.run
      @chef_client = nil
      if Chef::Config[:interval]
        Chef::Log.debug("Sleeping for #{Chef::Config[:interval]} seconds")
        unless SELF_PIPE.empty?
          client_sleep Chef::Config[:interval]
        else
          # Windows
          sleep Chef::Config[:interval]
        end
      else
        Chef::Application.exit! "Exiting", 0
      end
    rescue Chef::Application::Wakeup => e
      Chef::Log.debug("Received Wakeup signal.  Starting run.")
      next
    rescue SystemExit => e
      raise
    rescue Exception => e
      if Chef::Config[:interval]
        Chef::Log.error("#{e.class}: #{e}")
        Chef::Application.debug_stacktrace(e)
        Chef::Log.error("Sleeping for #{Chef::Config[:interval]} seconds before trying again")
        unless SELF_PIPE.empty?
          client_sleep Chef::Config[:interval]
        else
          # Windows
          sleep Chef::Config[:interval]
        end
        retry
      else
        Chef::Application.debug_stacktrace(e)
        Chef::Application.fatal!("#{e.class}: #{e.message}", 1)
      end
    ensure
      GC.start
    end
  end
end

#setup_applicationObject



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# File 'lib/chef/application/client.rb', line 206

def setup_application
  Chef::Daemon.change_privilege
end