Class: Lumbersexual::Plugin::LoadGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/lumbersexual/plugin/load_generator.rb

Instance Method Summary collapse

Constructor Details

#initialize(options, *args) ⇒ LoadGenerator

Returns a new instance of LoadGenerator.



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# File 'lib/lumbersexual/plugin/load_generator.rb', line 13

def initialize(options, *args)
  @options = options
end

Instance Method Details

#perform ⇒ Object 



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# File 'lib/lumbersexual/plugin/load_generator.rb', line 17

def perform
  # Get our word corpus and define the priorities and facilities we can use
  facilities = [ Syslog::LOG_ALERT, Syslog::LOG_CRIT, Syslog::LOG_ERR, Syslog::LOG_WARNING, Syslog::LOG_NOTICE, Syslog::LOG_INFO ]
  @options[:facilities].each { |f| facilities << Object.const_get('Syslog').const_get("LOG_#{f.upcase}") }

  priorities = [ Syslog::LOG_AUTHPRIV, Syslog::LOG_CRON, Syslog::LOG_DAEMON, Syslog::LOG_FTP, Syslog::LOG_LPR, Syslog::LOG_MAIL, Syslog::LOG_NEWS, Syslog::LOG_SYSLOG, Syslog::LOG_USER, Syslog::LOG_UUCP]
  0..7.times { |n| priorities << Object.const_get('Syslog').const_get("LOG_LOCAL#{n}")}
  @options[:priorities].each { |p| priorities << Object.const_get('Syslog').const_get("LOG_#{p.upcase}") }

  words = []
  raise "Unable to find dictionary file at #{@options[:dictionaryfile]}" unless File.exist?(@options[:dictionaryfile])
  File.open(@options[:dictionaryfile]).each_line { |l| words << l.chomp }

  case @options[:rate]
  when 0
   pause = 0.0
  else
    pause = 1.0 / @options[:rate]
  end

  puts "Runtime: #{RUBY_VERSION} #{RUBY_PLATFORM}"
  puts "Loaded #{words.size} words"
  puts "Timeout: #{@options[:timeout]}"
  puts "Threads: #{@options[:threads]}"
  puts "Rate per thread: #{@options[:rate]}/s"
  puts "Total rate: #{@options[:rate] * @options[:threads]}/s"
  puts "Minimum words per message: #{@options[:minwords]}"
  puts "Maximum words per message: #{@options[:maxwords]}"
  puts "Statsd host: #{@options[:statsdhost]}" if @options[:statsdhost]
  puts "Running ..."

  # Run until we're done
  @global_count = 0
  threads = []
  mutex = Mutex.new
  @start_time = Time.now

  @options[:threads].times do
    threads << Thread.new {
      # Configure telemetry
      statsd = Statsd.new(@options[:statsdhost]).tap { |s| s.namespace = "lumbersexual.thread.#{SecureRandom.uuid}" } if @options[:statsdhost]

      while true do
        # Connect to syslog with some sane @options and log a message
        message = String.new
        number_of_words = rand(@options[:minwords]..@options[:maxwords])
        words.sample(number_of_words).each { |w| message << "#{w} " }
        ident = "lumbersexual-#{words.sample}"
        facility = facilities.sample
        priority = priorities.sample

        sleep pause
        mutex.synchronize {
          syslog = Syslog.open(ident, Syslog::LOG_CONS | Syslog::LOG_NDELAY | Syslog::LOG_PID, priority)
          syslog.log(facility, message)
          @global_count += 1
          statsd.increment [ facility, priority, 'messages_sent' ].join('.') if @options[:statsdhost]
          syslog.close
        }

      end
    }

  end

  Timeout::timeout(@options[:timeout]) {
    threads.each {|t| t.join}
  }
end

#report ⇒ Object 



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# File 'lib/lumbersexual/plugin/load_generator.rb', line 87

def report
  end_time = Time.now
  elapsed = end_time - @start_time
  rate = @global_count / elapsed
  statsd_global = Statsd.new(@options[:statsdhost]).tap { |s| s.namespace = "lumbersexual.run" } if @options[:statsdhost]
  puts "Sent: #{@global_count}" 
  statsd_global.gauge 'messages_total', @global_count if @options[:statsdhost]
  puts "Elapsed time: #{elapsed}"
  statsd_global.timing 'elapsed', elapsed if @options[:statsdhost]
  puts "Messages per second: #{rate}"
  statsd_global.gauge 'rate', rate if @options[:statsdhost]
end