Class: VarnishPipe

Inherits:
Object
  • Object
show all
Defined in:
lib/varnish_pipe.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config, regexs) ⇒ VarnishPipe

Returns a new instance of VarnishPipe.



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# File 'lib/varnish_pipe.rb', line 6

def initialize(config, regexs)
  @stats = {
    :total_reqs => 0,
    :total_bytes => 0,
    :requests => {},
    :calls => {},
    :hitratio => {},
    :reqps => {},
    :bps => {},
  }

  @semaphore = Mutex.new
  @avg_period = config[:avg_period]
  @host_mode = config[:host_mode]
  @default_key = "other"

  @regexs = regexs
end

Instance Attribute Details

#semaphore ⇒ Object

Returns the value of attribute semaphore.



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# File 'lib/varnish_pipe.rb', line 4

def semaphore
  @semaphore
end

#start_time ⇒ Object

Returns the value of attribute start_time.



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# File 'lib/varnish_pipe.rb', line 4

def start_time
  @start_time
end

#stats ⇒ Object

Returns the value of attribute stats.



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# File 'lib/varnish_pipe.rb', line 4

def stats
  @stats
end

Instance Method Details

#start ⇒ Object 



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# File 'lib/varnish_pipe.rb', line 25

def start
  @stop = false
  @start_time = Time.new.to_f
  @start_ts = @start_time.to_i

  IO.popen("varnishncsa -F '%{Host}i %U %{Varnish:hitmiss}x %b'").each_line do |line|
    if line =~ /^(\S+) (\S+) (\w+) (\d+)$/
      host, url, status, bytes = $1, $2, $3, $4
      key = nil

      if (@host_mode) 
        key = host;
      else
        @regexs.each do |k,v|
          if k.match(url)
            key = v.map{|x| "#{$~[x]}" }.join(":")
            break
          end
        end
        key = @default_key unless key
      end


      @semaphore.synchronize do
        duration = (Time.now.to_i - @start_ts)
        it = duration / @avg_period
        idx = duration % @avg_period

        @stats[:requests][key] ||= {
          :hit => Array.new(@avg_period, 0),
          :miss => Array.new(@avg_period, 0),
          :bytes => Array.new(@avg_period, 0),
          :it => Array.new(@avg_period, 0),
          :last => ""
        }

        cur_req = @stats[:requests][key]
        if cur_req[:it][idx] < it
          cur_req[status.to_sym][idx] = 0
          cur_req[:bytes][idx] = 0
        end
        cur_req[status.to_sym][idx] += 1
        cur_req[:bytes][idx] += bytes.to_i
        cur_req[:it][idx] = it
        cur_req[:last] = url
        @stats[:total_reqs] += 1
        @stats[:total_bytes] += bytes.to_i
      end
    end

    break if @stop
  end
end

#stop ⇒ Object 



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# File 'lib/varnish_pipe.rb', line 79

def stop
  @stop = true
end