Class: Fluent::KafkaOutput
- Inherits:
-
Output
- Object
- Output
- Fluent::KafkaOutput
- Includes:
- Fluent::KafkaPluginUtil::SSLSettings
- Defined in:
- lib/fluent/plugin/out_kafka.rb
Instance Attribute Summary collapse
-
#field_separator ⇒ Object
Returns the value of attribute field_separator.
-
#output_data_type ⇒ Object
Returns the value of attribute output_data_type.
Instance Method Summary collapse
- #configure(conf) ⇒ Object
- #emit(tag, es, chain) ⇒ Object
- #get_schema_from_redis_by_name(schema_name) ⇒ Object
- #init_redis ⇒ Object
-
#initialize ⇒ KafkaOutput
constructor
A new instance of KafkaOutput.
- #refresh_client ⇒ Object
- #set_schema_to_redis(schema_name, schema) ⇒ Object
- #setup_formatter(conf) ⇒ Object
- #shutdown ⇒ Object
- #start ⇒ Object
Methods included from Fluent::KafkaPluginUtil::SSLSettings
Constructor Details
#initialize ⇒ KafkaOutput
Returns a new instance of KafkaOutput.
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# File 'lib/fluent/plugin/out_kafka.rb', line 71 def initialize super require 'kafka' @kafka = nil end |
Instance Attribute Details
#field_separator ⇒ Object
Returns the value of attribute field_separator.
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# File 'lib/fluent/plugin/out_kafka.rb', line 65 def field_separator @field_separator end |
#output_data_type ⇒ Object
Returns the value of attribute output_data_type.
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# File 'lib/fluent/plugin/out_kafka.rb', line 64 def output_data_type @output_data_type end |
Instance Method Details
#configure(conf) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 103 def configure(conf) super if @zookeeper require 'zookeeper' else @seed_brokers = @brokers.match(",").nil? ? [@brokers] : @brokers.split(",") log.info "brokers has been set directly: #{@seed_brokers}" end if conf['ack_timeout_ms'] log.warn "'ack_timeout_ms' parameter is deprecated. Use second unit 'ack_timeout' instead" @ack_timeout = conf['ack_timeout_ms'].to_i / 1000 end @f_separator = case @field_separator when /SPACE/i then ' ' when /COMMA/i then ',' when /SOH/i then "\x01" else "\t" end @formatter_proc = setup_formatter(conf) @producer_opts = {max_retries: @max_send_retries, required_acks: @required_acks} @producer_opts[:ack_timeout] = @ack_timeout if @ack_timeout @producer_opts[:compression_codec] = @compression_codec.to_sym if @compression_codec end |
#emit(tag, es, chain) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 220 def emit(tag, es, chain) begin chain.next # out_kafka is mainly for testing so don't need the performance unlike out_kafka_buffered. producer = @kafka.producer(@producer_opts) es.each do |time, record| record = record.select{|key, value| !key.nil? && !key.empty?} if @output_include_time if @time_format record['time'] = Time.at(time).strftime(@time_format) else record['time'] = time end end record['tag'] = tag if @output_include_tag partition_key = (@exclude_partition_key ? record.delete('partition_key') : record['partition_key']) || @default_partition_key partition = (@exclude_partition ? record.delete('partition'.freeze) : record['partition'.freeze]) || @default_partition = (@exclude_message_key ? record.delete('message_key') : record['message_key']) || @default_message_key value = @formatter_proc.call(tag, time, record) topic = (@exclude_topic_key ? record.delete('topic') : record['topic']) || @default_topic || @topic_name log.on_trace { log.trace("message will send to #{topic} with partition_key: #{partition_key}, partition: #{partition}, message_key: #{} and value: #{record_buf}.") } producer.produce(value, topic: topic, key: , partition: partition, partition_key: partition_key) end producer. producer.shutdown rescue Exception => e log.warn "Send exception occurred: #{e}" producer.shutdown if producer refresh_client raise e end end |
#get_schema_from_redis_by_name(schema_name) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 266 def get_schema_from_redis_by_name schema_name if stored_schema = $redis.get(schema_name) parsed_schema = JSON.parse($redis.get(schema_name)) { 'schema_id' => parsed_schema['schema_id'], 'schema' => Avro::Schema.parse(parsed_schema['schema_json']), 'field_types' => parsed_schema['field_types'] } end end |
#init_redis ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 258 def init_redis $redis = Redis.new end |
#refresh_client ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 79 def refresh_client if @zookeeper @seed_brokers = [] z = Zookeeper.new(@zookeeper) z.get_children(:path => @zookeeper_path)[:children].each do |id| broker = Yajl.load(z.get(:path => @zookeeper_path + "/#{id}")[:data]) @seed_brokers.push("#{broker['host']}:#{broker['port']}") end z.close log.info "brokers has been refreshed via Zookeeper: #{@seed_brokers}" end begin if @seed_brokers.length > 0 @kafka = Kafka.new(seed_brokers: @seed_brokers, client_id: @client_id, ssl_ca_cert: read_ssl_file(@ssl_ca_cert), ssl_client_cert: read_ssl_file(@ssl_client_cert), ssl_client_cert_key: read_ssl_file(@ssl_client_cert_key)) log.info "initialized kafka producer: #{@client_id}" else log.warn "No brokers found on Zookeeper" end rescue Exception => e log.error e end end |
#set_schema_to_redis(schema_name, schema) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 262 def set_schema_to_redis schema_name, schema $redis.set(schema_name, schema.to_json) end |
#setup_formatter(conf) ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 142 def setup_formatter(conf) if @output_data_type == 'json' require 'yajl' Proc.new { |tag, time, record| Yajl::Encoder.encode(record) } elsif @output_data_type == 'avro' require "avro_turf" require 'avro_turf/messaging' require "avro/builder" init_redis Proc.new do |tag, time, record| record = record.select{|key, value| !key.nil? && !key.empty?}.map do |k, v| [ k.tr('[]-', '_').delete('$'), (v.is_a?(Fixnum) || v.is_a?(Float) || v.nil? ? v : v.to_s.force_encoding("UTF-8")) ] end.to_h = Time.new record['enchilada_time_with_format'] = .strftime("%Y-%m-%dT%H:%M:%S.%LZ") @topic_name = schema_name = "#{tag.to_s.tr('.$:', '_')}_#{Digest::MD5.new.hexdigest(record.keys.to_s)[0..5]}" avro = AvroTurf::Messaging.new(registry_url: @schema_registry) unless (stored_schema = get_schema_from_redis_by_name(schema_name)) fields = record.map do |key, value| { 'name' => key, 'type' => ['null', (value.is_a?(Fixnum) ? 'int' : (value.is_a?(Float) ? 'float' : 'string'))] } end field_types = fields.map{|field| [field['name'], (field['type'] - ['null']).first]}.to_h fields << {"name" => "enchilada_timestamp", "type" => "long"} schema_json = { "type": "record", "name": schema_name, "fields": fields }.to_json registry = avro.instance_variable_get('@registry') schema = Avro::Schema.parse(schema_json) schema_id = registry.register("#{schema_name}-value", schema) stored_schema = { 'schema_json' => schema_json, 'schema_id' => schema_id, 'field_types' => field_types, 'schema' => schema } set_schema_to_redis(schema_name, stored_schema) end record['enchilada_timestamp'] = .strftime('%s%3N').to_i record = record.map do |key, val| [key, (stored_schema['field_types'][key] != 'string' || val.nil? ? val : val.to_s)] end.to_h avro.encode(record, stored_schema['schema_id'], schema: stored_schema['schema']) end elsif @output_data_type == 'ltsv' require 'ltsv' Proc.new { |tag, time, record| LTSV.dump(record) } elsif @output_data_type == 'msgpack' require 'msgpack' Proc.new { |tag, time, record| record.to_msgpack } elsif @output_data_type =~ /^attr:(.*)$/ @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
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# File 'lib/fluent/plugin/out_kafka.rb', line 137 def shutdown super @kafka = nil end |
#start ⇒ Object
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# File 'lib/fluent/plugin/out_kafka.rb', line 132 def start super refresh_client end |