Class: RightScale::AgentController

Inherits:
Object
  • Object
show all
Includes:
CommonParser
Defined in:
lib/right_agent/scripts/agent_controller.rb

Constant Summary collapse

FORCED_OPTIONS = 
{
  :threadpool_size => 1
}
DEFAULT_OPTIONS = 
{
  :single_threaded => true,
  :log_dir => Platform.filesystem.log_dir,
  :daemonize => true
}
@@agent = 
nil

Class Method Summary collapse

Instance Method Summary collapse

Methods included from CommonParser

#agent_type, #parse_common, #resolve_identity

Class Method Details

.run ⇒ Object

Create and run controller

Return

true

Always return true



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# File 'lib/right_agent/scripts/agent_controller.rb', line 104

def self.run
  c = AgentController.new
  c.control(c.parse_args)
end

Instance Method Details

#control(options) ⇒ Object

Parse arguments and execute request

Parameters

options(Hash)

Command line options

Return

true

Always return true



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# File 'lib/right_agent/scripts/agent_controller.rb', line 116

def control(options)

  # Initialize directory settings
  AgentConfig.cfg_dir = options[:cfg_dir]
  AgentConfig.pid_dir = options[:pid_dir]

  # List agents if requested
  list_configured_agents if options[:list]

  # Validate arguments
  action = options.delete(:action)
  fail("No action specified on the command line.", print_usage = true) unless action
  if action == 'kill' && (options[:pid_file].nil? || !File.file?(options[:pid_file]))
    fail("Missing or invalid pid file #{options[:pid_file]}", print_usage = true)
  end
  if options[:agent_name]
    if action == 'start'
      cfg = configure_agent(action, options)
    else
      cfg = AgentConfig.load_cfg(options[:agent_name])
      fail("Deployment is missing configuration file #{AgentConfig.cfg_file(options[:agent_name]).inspect}.") unless cfg
    end
    options.delete(:identity)
    options = cfg.merge(options)
    AgentConfig.root_dir = options[:root_dir]
    AgentConfig.pid_dir = options[:pid_dir]
    Log.program_name = syslog_program_name(options)
    Log.log_to_file_only(options[:log_to_file_only])
    configure_proxy(options[:http_proxy], options[:http_no_proxy]) if options[:http_proxy]
  elsif options[:identity]
    options[:agent_name] = AgentConfig.agent_name(options[:identity])
  end
  @options = DEFAULT_OPTIONS.clone.merge(options.merge(FORCED_OPTIONS))
  FileUtils.mkdir_p(@options[:pid_dir]) unless @options[:pid_dir].nil? || File.directory?(@options[:pid_dir])

  # Execute request
  success = case action
  when /show|killall/
    action = 'stop' if action == 'killall'
    s = true
    AgentConfig.cfg_agents.each { |agent_name| s &&= dispatch(action, agent_name) }
    s
  when 'kill'
    kill_process
  else
    dispatch(action, @options[:agent_name])
  end

  exit(1) unless success
end

#parse_args ⇒ Object

Create options hash from command line arguments

Return

options(Hash)

Parsed options



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# File 'lib/right_agent/scripts/agent_controller.rb', line 171

def parse_args
  options = {:thin_command_client => false}

  opts = OptionParser.new do |opts|
    parse_common(opts, options)
    parse_other_args(opts, options)

    opts.on("-s", "--start AGENT") do |a|
      options[:action] = 'start'
      options[:agent_name] = a
    end

    opts.on("-p", "--stop AGENT") do |a|
      options[:action] = 'stop'
      options[:agent_name] = a
    end

    opts.on("--stop-agent ID") do |id|
      options[:action] = 'stop'
      options[:identity] = id
    end

    opts.on("-k", "--kill PIDFILE") do |file|
      options[:pid_file] = file
      options[:action] = 'kill'
    end

    opts.on("-K", "--killall") do
      options[:action] = 'killall'
    end

    opts.on("-U", "--status") do
      options[:action] = 'show'
    end

    opts.on("-l", "--list") do
      options[:list] = true
    end

    opts.on("--log-level LVL") do |lvl|
      options[:log_level] = lvl
    end

    opts.on("-c", "--cfg-dir DIR") do |d|
      options[:cfg_dir] = d
    end

    opts.on("-z", "--pid-dir DIR") do |dir|
      options[:pid_dir] = dir
    end

    opts.on("--log-dir DIR") do |dir|
      options[:log_dir] = dir

      # Ensure log directory exists (for windows, etc.)
      FileUtils.mkdir_p(dir) unless File.directory?(dir)
    end

    opts.on("-f", "--foreground") do
      options[:daemonize] = false
      #Squelch Ruby VM warnings about various things
      $VERBOSE = nil
    end

    opts.on("-I", "--interactive") do
      options[:console] = true
    end

    opts.on_tail("--help") do
      puts Usage.scan(__FILE__)
      exit
    end

  end

  begin
    opts.parse(ARGV)
  rescue Exception => e
    exit 0 if e.is_a?(SystemExit)
    fail(e.message, print_usage = true)
  end

  # allow specific arguments to use a thin command client for faster
  # execution (on Windows, etc.)
  unless options[:thin_command_client]
    # require full right_agent for any commands which do not specify thin
    # command client.
    require File.normalize_path(File.join(File.dirname(__FILE__), '..', '..', 'right_agent'))
  end
  resolve_identity(options)
  options
end