Class: Fluent::LibratoMetricsOutput

Inherits:
BufferedOutput
  • Object
show all
Includes:
MetricsMixin
Defined in:
lib/fluent/plugin/out_librato_metrics.rb

Defined Under Namespace

Modules: MetricsMixin Classes: CounterAggregator, GaugeAggregator

Instance Attribute Summary

Attributes included from MetricsMixin

#metrics

Instance Method Summary collapse

Methods included from MetricsMixin

#add_metrics, #each_metrics

Constructor Details

#initialize ⇒ LibratoMetricsOutput

Returns a new instance of LibratoMetricsOutput.



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# File 'lib/fluent/plugin/out_librato_metrics.rb', line 32

def initialize
  super
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_librato_metrics.rb', line 36

def configure(conf)
  super
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_librato_metrics.rb', line 40

def format(tag, time, record)
  out = ''.force_encoding('ASCII-8BIT')
  each_metrics(tag, time, record) {|d|
    name = d.name
    if d.each_keys.empty?
      key = name
    else
      key = "#{name}.#{d.keys.join('.')}"
    end
    partitioned_time = time / 60 * 60
    [key, partitioned_time, d.value*d.count].to_msgpack(out)
  }
  out
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_librato_metrics.rb', line 55

def write(chunk)
  counters = {}  #=> {partitioned_time => {name => CounterAggregator}}
  gauges = {}    #=> {partitioned_time => {name => GaugeAggregator}}

  chunk.msgpack_each {|key,partitioned_time,value|
    if m = /^counter\.(.*)$/.match(key)
      name = m[1]
      ((counters[partitioned_time] ||= {})[name] ||= CounterAggregator.new).add(value)
    elsif m = /^gauge\.(.*)$/.match(key)
      name = m[1]
      ((gauges[partitioned_time] ||= {})[name] ||= GaugeAggregator.new).add(value)
    else
      name = key
      ((gauges[partitioned_time] ||= {})[name] ||= GaugeAggregator.new).add(value)
    end
  }

  #http = Net::HTTP.new('metrics-api.librato.com', 80)
  http = Net::HTTP.new('metrics-api.librato.com', 443)
  http.use_ssl = true
  #http.verify_mode = OpenSSL::SSL::VERIFY_PEER
  http.verify_mode = OpenSSL::SSL::VERIFY_NONE  # TODO verify
  http.cert_store = OpenSSL::X509::Store.new
  header = {}

  begin
    {'counters'=>counters, 'gauges'=>gauges}.each_pair {|type,partitions|
      partitions.each_pair {|partitioned_time,name_aggrs|
        req = Net::HTTP::Post.new('/v1/metrics', header)
        req.basic_auth @librato_user, @librato_token

        params = {
          'measure_time' => partitioned_time.to_s,
        }
        params['source'] = @source if @source

        name_aggrs.each_with_index {|(name,aggr),i|
          params["#{type}[#{i}][name]"] = name
          params["#{type}[#{i}][value]"] = aggr.get.to_s
        }

        $log.trace { "librato metrics: #{params.inspect}" }
        req.set_form_data(params)
        res = http.request(req)

        # TODO error handling
        if res.code != "200"
          $log.warn "librato_metrics: #{res.code}: #{res.body}"
        end
      }
    }
  ensure
    http.finish if http.started?
  end
end