Class: Fluent::KafkaOutputBuffered2

Inherits:
BufferedOutput
  • Object
show all
Includes:
Fluent::KafkaPluginUtil::SSLSettings, Fluent::KafkaPluginUtil::SaslSettings
Defined in:
lib/fluent/plugin/out_rdkafka.rb

Constant Summary

Constants included from Fluent::KafkaPluginUtil::SSLSettings

Fluent::KafkaPluginUtil::SSLSettings::DummyFormatter

Instance Method Summary collapse

Methods included from Fluent::KafkaPluginUtil::SaslSettings

included

Methods included from Fluent::KafkaPluginUtil::SSLSettings

included, #pickup_ssl_endpoint, #read_ssl_file

Constructor Details

#initialize ⇒ KafkaOutputBuffered2

Returns a new instance of KafkaOutputBuffered2.



85
86
87
88
89
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 85

def initialize
  super
  @producers = {}
  @producers_mutex = Mutex.new
end

Instance Method Details

#build_config ⇒ Object 



120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 120

def build_config
  config = {
    :"bootstrap.servers" => @brokers,
  }

  if @ssl_ca_cert && @ssl_ca_cert[0]
    ssl = true
    config[:"ssl.ca.location"] = @ssl_ca_cert[0]
    config[:"ssl.certificate.location"] = @ssl_client_cert if @ssl_client_cert
    config[:"ssl.key.location"] = @ssl_client_cert_key if @ssl_client_cert_key
    config[:"ssl.key.password"] = @ssl_client_cert_key_password if @ssl_client_cert_key_password
  end

  if @principal
    sasl = true
    config[:"sasl.mechanisms"] = "GSSAPI"
    config[:"sasl.kerberos.principal"] = @principal
    config[:"sasl.kerberos.service.name"] = @service_name if @service_name
    config[:"sasl.kerberos.keytab"] = @keytab if @keytab
  end

  if ssl && sasl
    security_protocol = "SASL_SSL"
  elsif ssl && !sasl
    security_protocol = "SSL"
  elsif !ssl && sasl
    security_protocol = "SASL_PLAINTEXT"
  else
    security_protocol = "PLAINTEXT"
  end
  config[:"security.protocol"] = security_protocol

  config[:"compression.codec"] = @compression_codec if @compression_codec
  config[:"message.send.max.retries"] = @max_send_retries if @max_send_retries
  config[:"request.required.acks"] = @required_acks if @required_acks
  config[:"request.timeout.ms"] = @ack_timeout * 1000 if @ack_timeout
  config[:"queue.buffering.max.ms"] = @rdkafka_buffering_max_ms if @rdkafka_buffering_max_ms
  config[:"queue.buffering.max.messages"] = @rdkafka_buffering_max_messages if @rdkafka_buffering_max_messages
  config[:"message.max.bytes"] = @rdkafka_message_max_bytes if @rdkafka_message_max_bytes
  config[:"batch.num.messages"] = @rdkafka_message_max_num if @rdkafka_message_max_num

  @rdkafka_options.each { |k, v|
    config[k.to_sym] = v
  }

  config
end

#configure(conf) ⇒ Object 



91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 91

def configure(conf)
  super
  log.instance_eval {
    def add(level, &block)
      return unless block

      # Follow rdkakfa's log level. See also rdkafka-ruby's bindings.rb: https://github.com/appsignal/rdkafka-ruby/blob/e5c7261e3f2637554a5c12b924be297d7dca1328/lib/rdkafka/bindings.rb#L117
      case level
      when Logger::FATAL
        self.fatal(block.call)
      when Logger::ERROR
        self.error(block.call)
      when Logger::WARN
        self.warn(block.call)
      when Logger::INFO
        self.info(block.call)
      when Logger::DEBUG
        self.debug(block.call)
      else
        self.trace(block.call)
      end
    end
  }
  Rdkafka::Config.logger = log
  config = build_config
  @rdkafka = Rdkafka::Config.new(config)
  @formatter_proc = setup_formatter(conf)
end

#emit(tag, es, chain) ⇒ Object 



208
209
210
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 208

def emit(tag, es, chain)
  super(tag, es, chain, tag)
end

#enqueue_with_retry(producer, topic, record_buf, message_key, partition) ⇒ Object 



295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 295

def enqueue_with_retry(producer, topic, record_buf, message_key, partition)
  attempt = 0
  loop do
    begin
      handler = producer.produce(topic: topic, payload: record_buf, key: message_key, partition: partition)
      return handler
    rescue Exception => e
      if e.respond_to?(:code) && e.code == :queue_full
        if attempt <= @max_enqueue_retries
          log.warn "Failed to enqueue message; attempting retry #{attempt} of #{@max_enqueue_retries} after #{@enqueue_retry_backoff}s"
          sleep @enqueue_retry_backoff
          attempt += 1
        else
          raise "Failed to enqueue message although tried retry #{@max_enqueue_retries} times"
        end
      else
        raise e
      end
    end
  end
end

#format_stream(tag, es) ⇒ Object 



212
213
214
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 212

def format_stream(tag, es)
  es.to_msgpack_stream
end

#get_producer ⇒ Object 



197
198
199
200
201
202
203
204
205
206
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 197

def get_producer
  @producers_mutex.synchronize {
    producer = @producers[Thread.current.object_id]
    unless producer
      producer = @rdkafka.producer
      @producers[Thread.current.object_id] = producer
    end
    producer
  }
end

#multi_workers_ready? ⇒ Boolean

Returns:

  • (Boolean) 


172
173
174
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 172

def multi_workers_ready?
  true
end

#setup_formatter(conf) ⇒ Object 



216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 216

def setup_formatter(conf)
  if @output_data_type == 'json'
    begin
      require 'oj'
      Oj.default_options = Fluent::DEFAULT_OJ_OPTIONS
      Proc.new { |tag, time, record| Oj.dump(record) }
    rescue LoadError
      require 'yajl'
      Proc.new { |tag, time, record| Yajl::Encoder.encode(record) }
    end
  elsif @output_data_type == 'ltsv'
    require 'ltsv'
    Proc.new { |tag, time, record| LTSV.dump(record) }
  elsif @output_data_type == 'msgpack'
    require 'msgpack'
    Proc.new { |tag, time, record| record.to_msgpack }
  elsif @output_data_type =~ /^attr:(.*)$/
    @custom_attributes = $1.split(',').map(&:strip).reject(&:empty?)
    @custom_attributes.unshift('time') if @output_include_time
    @custom_attributes.unshift('tag') if @output_include_tag
    Proc.new { |tag, time, record|
      @custom_attributes.map { |attr|
        record[attr].nil? ? '' : record[attr].to_s
      }.join(@f_separator)
    }
  else
    @formatter = Fluent::Plugin.new_formatter(@output_data_type)
    @formatter.configure(conf)
    @formatter.method(:format)
  end
end

#shutdown ⇒ Object 



176
177
178
179
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 176

def shutdown
  super
  shutdown_producers
end

#shutdown_producers ⇒ Object 



181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 181

def shutdown_producers
  @producers_mutex.synchronize {
    shutdown_threads = @producers.map { |key, producer|
      th = Thread.new {
        unless producer.close(10)
          log.warn("Queue is forcefully closed after 10 seconds wait")
        end
      }
      th.abort_on_exception = true
      th
    }
    shutdown_threads.each { |th| th.join }
    @producers = {}
  }
end

#start ⇒ Object 



168
169
170
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 168

def start
  super
end

#write(chunk) ⇒ Object 



248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
 
# File 'lib/fluent/plugin/out_rdkafka.rb', line 248

def write(chunk)
  tag = chunk.key
  def_topic = @default_topic || tag

  record_buf = nil
  record_buf_bytes = nil

  begin
    chunk.msgpack_each.map { |time, record|
      begin
        if @output_include_time
          if @time_format
            record['time'.freeze] = Time.at(time).strftime(@time_format)
          else
            record['time'.freeze] = time
          end
        end

        record['tag'] = tag if @output_include_tag
        topic = (@exclude_topic_key ? record.delete('topic'.freeze) : record['topic'.freeze]) || def_topic
        partition = (@exclude_partition ? record.delete('partition'.freeze) : record['partition'.freeze]) || @default_partition
        message_key = (@exclude_message_key ? record.delete('message_key'.freeze) : record['message_key'.freeze]) || @default_message_key

        record_buf = @formatter_proc.call(tag, time, record)
        record_buf_bytes = record_buf.bytesize
        if @max_send_limit_bytes && record_buf_bytes > @max_send_limit_bytes
          log.warn "record size exceeds max_send_limit_bytes. Skip event:", :time => time, :record => record
          next
        end
      rescue StandardError => e
        log.warn "unexpected error during format record. Skip broken event:", :error => e.to_s, :error_class => e.class.to_s, :time => time, :record => record
        next
      end

      producer = get_producer
      handler = enqueue_with_retry(producer, topic, record_buf, message_key, partition)
      handler
    }.each { |handler|
      handler.wait(max_wait_timeout: @rdkafka_delivery_handle_poll_timeout) if @rdkafka_delivery_handle_poll_timeout != 0
    }
  end
rescue Exception => e
  log.warn "Send exception occurred: #{e} at #{e.backtrace.first}"
  # Raise exception to retry sendind messages
  raise e
end