Class: Fluent::Plugin::ElasticsearchOutput

Inherits:
Output
  • Object
show all
Includes:
ElasticsearchIndexTemplate, ElasticsearchConstants, ElasticsearchIndexLifecycleManagement, ElasticsearchTLS
Defined in:
lib/fluent/plugin/out_elasticsearch.rb

Defined Under Namespace

Classes: MissingIdFieldError, RecoverableRequestFailure, RequestInfo, RetryStreamEmitFailure, RetryStreamError, UnrecoverableRequestFailure

Constant Summary collapse

DEFAULT_BUFFER_TYPE = 
"memory"
DEFAULT_ELASTICSEARCH_VERSION =

For compatibility.

5
DEFAULT_TYPE_NAME_ES_7x = 
"_doc".freeze
DEFAULT_TYPE_NAME = 
"fluentd".freeze
DEFAULT_RELOAD_AFTER = 
-1
TARGET_BULK_BYTES = 
20 * 1024 * 1024
DEFAULT_POLICY_ID = 
"logstash-policy"

Constants included from ElasticsearchTLS

Fluent::Plugin::ElasticsearchTLS::DEFAULT_VERSION, Fluent::Plugin::ElasticsearchTLS::SUPPORTED_TLS_VERSIONS

Constants included from ElasticsearchIndexLifecycleManagement

Fluent::Plugin::ElasticsearchIndexLifecycleManagement::ILM_DEFAULT_POLICY_PATH

Constants included from ElasticsearchConstants

Fluent::Plugin::ElasticsearchConstants::BODY_DELIMITER, Fluent::Plugin::ElasticsearchConstants::CREATE_OP, Fluent::Plugin::ElasticsearchConstants::ID_FIELD, Fluent::Plugin::ElasticsearchConstants::INDEX_OP, Fluent::Plugin::ElasticsearchConstants::TIMESTAMP_FIELD, Fluent::Plugin::ElasticsearchConstants::UPDATE_OP, Fluent::Plugin::ElasticsearchConstants::UPSERT_OP

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ElasticsearchTLS

included, #set_tls_minmax_version_config

Methods included from ElasticsearchIndexLifecycleManagement

#create_ilm_policy, #default_policy_payload, #get_ilm_policy, #ilm_policy_exists?, #ilm_policy_put, #setup_ilm, #verify_ilm_working, #xpack_info

Methods included from ElasticsearchIndexTemplate

#create_rollover_alias, #get_custom_template, #get_template, #get_template_name, #indexcreation, #inject_ilm_settings_to_template, #retry_operate, #rollover_alias_payload, #template_custom_install, #template_exists?, #template_install, #template_put, #templates_hash_install

Constructor Details

#initialize ⇒ ElasticsearchOutput

Returns a new instance of ElasticsearchOutput.



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 194

def initialize
  super
end

Instance Attribute Details

#alias_indexes ⇒ Object (readonly)

Returns the value of attribute alias_indexes.



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 58

def alias_indexes
  @alias_indexes
end

#api_key_header ⇒ Object (readonly)

Returns the value of attribute api_key_header.



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 62

def api_key_header
  @api_key_header
end

#compressable_connection ⇒ Object (readonly)

Returns the value of attribute compressable_connection.



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 61

def compressable_connection
  @compressable_connection
end

#ssl_version_options ⇒ Object (readonly)

Returns the value of attribute ssl_version_options.



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 60

def ssl_version_options
  @ssl_version_options
end

#template_names ⇒ Object (readonly)

Returns the value of attribute template_names.



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 59

def template_names
  @template_names
end

Instance Method Details

#append_record_to_messages(op, meta, header, record, msgs) ⇒ Object

append_record_to_messages adds a record to the bulk message payload to be submitted to Elasticsearch. Records that do not include ‘_id’ field are skipped when ‘write_operation’ is configured for ‘create’ or ‘update’

returns ‘true’ if record was appended to the bulk message

and 'false' otherwise



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 697

def append_record_to_messages(op, meta, header, record, msgs)
  case op
  when UPDATE_OP, UPSERT_OP
    if meta.has_key?(ID_FIELD)
      header[UPDATE_OP] = meta
      msgs << @dump_proc.call(header) << BODY_DELIMITER
      msgs << @dump_proc.call(update_body(record, op)) << BODY_DELIMITER
      return true
    end
  when CREATE_OP
    if meta.has_key?(ID_FIELD)
      header[CREATE_OP] = meta
      msgs << @dump_proc.call(header) << BODY_DELIMITER
      msgs << @dump_proc.call(record) << BODY_DELIMITER
      return true
    end
  when INDEX_OP
    header[INDEX_OP] = meta
    msgs << @dump_proc.call(header) << BODY_DELIMITER
    msgs << @dump_proc.call(record) << BODY_DELIMITER
    return true
  end
  return false
end

#backend_options ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 469

def backend_options
  case @http_backend
  when :excon
    { client_key: @client_key, client_cert: @client_cert, client_key_pass: @client_key_pass, nonblock: @http_backend_excon_nonblock }
  when :typhoeus
    require 'typhoeus'
    { sslkey: @client_key, sslcert: @client_cert, keypasswd: @client_key_pass }
  end
rescue LoadError => ex
  log.error_backtrace(ex.backtrace)
  raise Fluent::ConfigError, "You must install #{@http_backend} gem. Exception: #{ex}"
end

#client(host = nil, compress_connection = false) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 584

def client(host = nil, compress_connection = false)
  return cloud_client if @cloud_id

  # check here to see if we already have a client connection for the given host
  connection_options = get_connection_options(host)

  @_es = nil unless is_existing_connection(connection_options[:hosts])
  @_es = nil unless @compressable_connection == compress_connection

  @_es ||= begin
    @compressable_connection = compress_connection
    @current_config = connection_options[:hosts].clone
    adapter_conf = lambda {|f| f.adapter @http_backend, @backend_options }
    local_reload_connections = @reload_connections
    if local_reload_connections && @reload_after > DEFAULT_RELOAD_AFTER
      local_reload_connections = @reload_after
    end

    gzip_headers = if compress_connection
                     {'Content-Encoding' => 'gzip'}
                   else
                     {}
                   end
    headers = { 'Content-Type' => @content_type.to_s }
                .merge(@custom_headers)
                .merge(@api_key_header)
                .merge(gzip_headers)
    ssl_options = { verify: @ssl_verify, ca_file: @ca_file}.merge(@ssl_version_options)

    transport = Elasticsearch::Transport::Transport::HTTP::Faraday.new(connection_options.merge(
                                                                        options: {
                                                                          reload_connections: local_reload_connections,
                                                                          reload_on_failure: @reload_on_failure,
                                                                          resurrect_after: @resurrect_after,
                                                                          logger: @transport_logger,
                                                                          transport_options: {
                                                                            headers: headers,
                                                                            request: { timeout: @request_timeout },
                                                                            ssl: ssl_options,
                                                                          },
                                                                          http: {
                                                                            user: @user,
                                                                            password: @password,
                                                                            scheme: @scheme
                                                                          },
                                                                          sniffer_class: @sniffer_class,
                                                                          serializer_class: @serializer_class,
                                                                          selector_class: @selector_class,
                                                                          compression: compress_connection,
                                                                        }), &adapter_conf)
    Elasticsearch::Client.new transport: transport
  end
end

#client_library_version ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 507

def client_library_version
  Elasticsearch::VERSION
end

#cloud_client ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 576

def cloud_client
  Elasticsearch::Client.new(
    cloud_id: @cloud_id,
    user: @user,
    password: @password
  )
end

#compression ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 452

def compression
  !(@compression_level == :no_compression)
end

#compression_strategy ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 456

def compression_strategy
  case @compression_level
  when :default_compression
    Zlib::DEFAULT_COMPRESSION
  when :best_compression
    Zlib::BEST_COMPRESSION
  when :best_speed
    Zlib::BEST_SPEED
  else
    Zlib::NO_COMPRESSION
  end
end

#configure(conf) ⇒ Object

Raises:

  • (Fluent::ConfigError) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 198

def configure(conf)
  compat_parameters_convert(conf, :buffer)

  super
  if placeholder_substitution_needed_for_template?
    # nop.
  elsif not @buffer_config.chunk_keys.include? "tag" and
    not @buffer_config.chunk_keys.include? "_index"
    raise Fluent::ConfigError, "'tag' or '_index' in chunk_keys is required."
  end
  @time_parser = create_time_parser
  @backend_options = backend_options
  @ssl_version_options = set_tls_minmax_version_config(@ssl_version, @ssl_max_version, @ssl_min_version)

  if @remove_keys
    @remove_keys = @remove_keys.split(/\s*,\s*/)
  end

  if @target_index_key && @target_index_key.is_a?(String)
    @target_index_key = @target_index_key.split '.'
  end

  if @target_type_key && @target_type_key.is_a?(String)
    @target_type_key = @target_type_key.split '.'
  end

  if @remove_keys_on_update && @remove_keys_on_update.is_a?(String)
    @remove_keys_on_update = @remove_keys_on_update.split ','
  end

  @api_key_header = setup_api_key

  raise Fluent::ConfigError, "'max_retry_putting_template' must be greater than or equal to zero." if @max_retry_putting_template < 0
  raise Fluent::ConfigError, "'max_retry_get_es_version' must be greater than or equal to zero." if @max_retry_get_es_version < 0

  # Dump log when using host placeholders and template features at same time.
  valid_host_placeholder = placeholder?(:host_placeholder, @host)
  if valid_host_placeholder && (@template_name && @template_file || @templates)
    if @verify_es_version_at_startup
      raise Fluent::ConfigError, "host placeholder, template installation, and verify Elasticsearch version at startup are exclusive feature at same time. Please specify verify_es_version_at_startup as `false` when host placeholder and template installation are enabled."
    end
    log.info "host placeholder and template installation makes your Elasticsearch cluster a bit slow down(beta)."
  end

  raise Fluent::ConfigError, "You can't specify ilm_policy and ilm_policies at the same time" unless @ilm_policy.empty? or @ilm_policies.empty?

  unless @ilm_policy.empty?
    @ilm_policies = { @ilm_policy_id => @ilm_policy }
  end
  @alias_indexes = []
  @template_names = []
  if !dry_run?
    if @template_name && @template_file
      if @enable_ilm
        raise Fluent::ConfigError, "deflector_alias is prohibited to use with enable_ilm at same time." if @deflector_alias
      end
      if @ilm_policy.empty? && @ilm_policy_overwrite
        raise Fluent::ConfigError, "ilm_policy_overwrite requires a non empty ilm_policy."
      end
      if @logstash_format || placeholder_substitution_needed_for_template?
        class << self
          alias_method :template_installation, :template_installation_actual
        end
      else
        template_installation_actual(@deflector_alias ? @deflector_alias : @index_name, @template_name, @customize_template, @application_name, @index_name, @ilm_policy_id)
      end
      verify_ilm_working if @enable_ilm
    end
    if @templates
      retry_operate(@max_retry_putting_template,
                    @fail_on_putting_template_retry_exceed,
                    @catch_transport_exception_on_retry) do
        templates_hash_install(@templates, @template_overwrite)
      end
    end
  end

  @truncate_mutex = Mutex.new
  if @truncate_caches_interval
    timer_execute(:out_elasticsearch_truncate_caches, @truncate_caches_interval) do
      log.info('Clean up the indices and template names cache')

      @truncate_mutex.synchronize {
        @alias_indexes.clear
        @template_names.clear
      }
    end
  end

  @serializer_class = nil
  begin
    require 'oj'
    @dump_proc = Oj.method(:dump)
    if @prefer_oj_serializer
      @serializer_class = Fluent::Plugin::Serializer::Oj
      Elasticsearch::API.settings[:serializer] = Fluent::Plugin::Serializer::Oj
    end
  rescue LoadError
    @dump_proc = Yajl.method(:dump)
  end

  raise Fluent::ConfigError, "`cloud_auth` must be present if `cloud_id` is present" if @cloud_id && @cloud_auth.nil?
  raise Fluent::ConfigError, "`password` must be present if `user` is present" if @user && @password.nil?

  if @cloud_auth
    @user = @cloud_auth.split(':', -1)[0]
    @password = @cloud_auth.split(':', -1)[1]
  end

  if @user && m = @user.match(/%{(?<user>.*)}/)
    @user = URI.encode_www_form_component(m["user"])
  end
  if @password && m = @password.match(/%{(?<password>.*)}/)
    @password = URI.encode_www_form_component(m["password"])
  end

  @transport_logger = nil
  if @with_transporter_log
    @transport_logger = log
    log_level = conf['@log_level'] || conf['log_level']
    log.warn "Consider to specify log_level with @log_level." unless log_level
  end
  # Specify @sniffer_class before calling #client.
  # #detect_es_major_version uses #client.
  @sniffer_class = nil
  begin
    @sniffer_class = Object.const_get(@sniffer_class_name) if @sniffer_class_name
  rescue Exception => ex
    raise Fluent::ConfigError, "Could not load sniffer class #{@sniffer_class_name}: #{ex}"
  end

  @selector_class = nil
  begin
    @selector_class = Object.const_get(@selector_class_name) if @selector_class_name
  rescue Exception => ex
    raise Fluent::ConfigError, "Could not load selector class #{@selector_class_name}: #{ex}"
  end

  @last_seen_major_version = if major_version = handle_last_seen_es_major_version
                               major_version
                             else
                               @default_elasticsearch_version
                             end
  if @suppress_type_name && @last_seen_major_version >= 7
    @type_name = nil
  else
    if @last_seen_major_version == 6 && @type_name != DEFAULT_TYPE_NAME_ES_7x
      log.info "Detected ES 6.x: ES 7.x will only accept `_doc` in type_name."
    end
    if @last_seen_major_version == 7 && @type_name != DEFAULT_TYPE_NAME_ES_7x
      log.warn "Detected ES 7.x: `_doc` will be used as the document `_type`."
      @type_name = '_doc'.freeze
    end
    if @last_seen_major_version >= 8 && @type_name != DEFAULT_TYPE_NAME_ES_7x
      log.debug "Detected ES 8.x or above: This parameter has no effect."
      @type_name = nil
    end
  end

  if @validate_client_version && !dry_run?
    if @last_seen_major_version != client_library_version.to_i
      raise Fluent::ConfigError, <<-EOC
        Detected ES #{@last_seen_major_version} but you use ES client #{client_library_version}.
        Please consider to use #{@last_seen_major_version}.x series ES client.
      EOC
    end
  end

  if @last_seen_major_version >= 6
    case @ssl_version
    when :SSLv23, :TLSv1, :TLSv1_1
      if @scheme == :https
        log.warn "Detected ES 6.x or above and enabled insecure security:
                  You might have to specify `ssl_version TLSv1_2` in configuration."
      end
    end
  end

  if @ssl_version && @scheme == :https
    if !@http_backend_excon_nonblock
      log.warn "TLS handshake will be stucked with block connection.
                Consider to set `http_backend_excon_nonblock` as true"
    end
  end

  # Consider missing the prefix of "$." in nested key specifiers.
  @id_key = convert_compat_id_key(@id_key) if @id_key
  @parent_key = convert_compat_id_key(@parent_key) if @parent_key
  @routing_key = convert_compat_id_key(@routing_key) if @routing_key

  @routing_key_name = configure_routing_key_name
  @meta_config_map = create_meta_config_map
  @current_config = nil
  @compressable_connection = false

  @ignore_exception_classes = @ignore_exceptions.map do |exception|
    unless Object.const_defined?(exception)
      log.warn "Cannot find class #{exception}. Will ignore it."

      nil
    else
      Object.const_get(exception)
    end
  end.compact

  if @bulk_message_request_threshold < 0
    class << self
      alias_method :split_request?, :split_request_size_uncheck?
    end
  else
    class << self
      alias_method :split_request?, :split_request_size_check?
    end
  end

  if Gem::Version.create(::Elasticsearch::Transport::VERSION) < Gem::Version.create("7.2.0")
    if compression
      raise Fluent::ConfigError, <<-EOC
        Cannot use compression with elasticsearch-transport plugin version < 7.2.0
        Your elasticsearch-transport plugin version version is #{Elasticsearch::Transport::VERSION}.
        Please consider to upgrade ES client.
      EOC
    end
  end
end

#configure_routing_key_name ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 511

def configure_routing_key_name
  if @last_seen_major_version >= 7
    'routing'
  else
    '_routing'
  end
end

#connection_options_description(con_host = nil) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 682

def connection_options_description(con_host=nil)
  get_connection_options(con_host)[:hosts].map do |host_info|
    attributes = host_info.dup
    attributes[:password] = 'obfuscated' if attributes.has_key?(:password)
    attributes.inspect
  end.join(', ')
end

#convert_compat_id_key(key) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 519

def convert_compat_id_key(key)
  if key.include?('.') && !key.start_with?('$[')
    key = "$.#{key}" unless key.start_with?('$.')
  end
  key
end

#convert_numeric_time_into_string(numeric_time, time_key_format = "%Y-%m-%d %H:%M:%S.%N%z") ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 564

def convert_numeric_time_into_string(numeric_time, time_key_format = "%Y-%m-%d %H:%M:%S.%N%z")
  numeric_time_parser = Fluent::NumericTimeParser.new(:float)
  Time.at(numeric_time_parser.parse(numeric_time).to_r).strftime(time_key_format)
end

#create_meta_config_map ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 526

def create_meta_config_map
  result = []
  result << [record_accessor_create(@id_key), '_id'] if @id_key
  result << [record_accessor_create(@parent_key), '_parent'] if @parent_key
  result << [record_accessor_create(@routing_key), @routing_key_name] if @routing_key
  result
end

#create_time_parser ⇒ Object

once fluent v0.14 is released we might be able to use Fluent::Parser::TimeParser, but it doesn’t quite do what we want - if gives

sec,nsec

where as we want something we can call ‘strftime` on…



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 537

def create_time_parser
  if @time_key_format
    begin
      # Strptime doesn't support all formats, but for those it does it's
      # blazingly fast.
      strptime = Strptime.new(@time_key_format)
      Proc.new { |value|
        value = convert_numeric_time_into_string(value, @time_key_format) if value.is_a?(Numeric)
        strptime.exec(value).to_datetime
      }
    rescue
      # Can happen if Strptime doesn't recognize the format; or
      # if strptime couldn't be required (because it's not installed -- it's
      # ruby 2 only)
      Proc.new { |value|
        value = convert_numeric_time_into_string(value, @time_key_format) if value.is_a?(Numeric)
        DateTime.strptime(value, @time_key_format)
      }
    end
  else
    Proc.new { |value|
      value = convert_numeric_time_into_string(value) if value.is_a?(Numeric)
      DateTime.parse(value)
    }
  end
end

#detect_es_major_version ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 494

def detect_es_major_version
  @_es_info ||= client.info
  begin
    unless version = @_es_info.dig("version", "number")
      version = @default_elasticsearch_version
    end
  rescue NoMethodError => e
    log.warn "#{@_es_info} can not dig version information. Assuming Elasticsearch #{@default_elasticsearch_version}", error: e
    version = @default_elasticsearch_version
  end
  version.to_i
end

#dry_run? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 430

def dry_run?
  if Fluent::Engine.respond_to?(:dry_run_mode)
    Fluent::Engine.dry_run_mode
  elsif Fluent::Engine.respond_to?(:supervisor_mode)
    Fluent::Engine.supervisor_mode
  end
end

#expand_placeholders(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 762

def expand_placeholders(chunk)
  logstash_prefix = extract_placeholders(@logstash_prefix, chunk)
  logstash_dateformat = extract_placeholders(@logstash_dateformat, chunk)
  index_name = extract_placeholders(@index_name, chunk)
  if @type_name
    type_name = extract_placeholders(@type_name, chunk)
  else
    type_name = nil
  end
  if @template_name
    template_name = extract_placeholders(@template_name, chunk)
  else
    template_name = nil
  end
  if @customize_template
    customize_template = @customize_template.each_with_object({}) { |(key, value), hash| hash[key] = extract_placeholders(value, chunk) }
  else
    customize_template = nil
  end
  if @deflector_alias
    deflector_alias = extract_placeholders(@deflector_alias, chunk)
  else
    deflector_alias = nil
  end
  if @application_name
    application_name = extract_placeholders(@application_name, chunk)
  else
    application_name = nil
  end
  if @pipeline
    pipeline = extract_placeholders(@pipeline, chunk)
  else
    pipeline = nil
  end
  if @ilm_policy_id
    ilm_policy_id = extract_placeholders(@ilm_policy_id, chunk)
  else
    ilm_policy_id = nil
  end
  return logstash_prefix, logstash_dateformat, index_name, type_name, template_name, customize_template, deflector_alias, application_name, pipeline, ilm_policy_id
end

#flatten_record(record, prefix = []) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 747

def flatten_record(record, prefix=[])
  ret = {}
  if record.is_a? Hash
    record.each { |key, value|
      ret.merge! flatten_record(value, prefix + [key.to_s])
    }
  elsif record.is_a? Array
    # Don't mess with arrays, leave them unprocessed
    ret.merge!({prefix.join(@flatten_hashes_separator) => record})
  else
    return {prefix.join(@flatten_hashes_separator) => record}
  end
  ret
end

#get_connection_options(con_host = nil) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 650

def get_connection_options(con_host=nil)

  hosts = if con_host || @hosts
    (con_host || @hosts).split(',').map do |host_str|
      # Support legacy hosts format host:port,host:port,host:port...
      if host_str.match(%r{^[^:]+(\:\d+)?$})
        {
          host:   host_str.split(':')[0],
          port:   (host_str.split(':')[1] || @port).to_i,
          scheme: @scheme.to_s
        }
      else
        # New hosts format expects URLs such as http://logs.foo.com,https://john:[email protected]/elastic
        uri = URI(get_escaped_userinfo(host_str))
        %w(user password path).inject(host: uri.host, port: uri.port, scheme: uri.scheme) do |hash, key|
          hash[key.to_sym] = uri.public_send(key) unless uri.public_send(key).nil? || uri.public_send(key) == ''
          hash
        end
      end
    end.compact
  else
    [{host: @host, port: @port, scheme: @scheme.to_s}]
  end.each do |host|
    host.merge!(user: @user, password: @password) if !host[:user] && @user
    host.merge!(path: @path) if !host[:path] && @path
  end

  {
    hosts: hosts
  }
end

#get_escaped_userinfo(host_str) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 638

def get_escaped_userinfo(host_str)
  if m = host_str.match(/(?<scheme>.*)%{(?<user>.*)}:%{(?<password>.*)}(?<path>@.*)/)
    m["scheme"] +
      URI.encode_www_form_component(m["user"]) +
      ':' +
      URI.encode_www_form_component(m["password"]) +
      m["path"]
  else
    host_str
  end
end

#get_parent_of(record, path) ⇒ Object

returns [parent, child_key] of child described by path array in record’s tree returns [nil, child_key] if path doesnt exist in record



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 979

def get_parent_of(record, path)
  parent_object = path[0..-2].reduce(record) { |a, e| a.is_a?(Hash) ? a[e] : nil }
  [parent_object, path[-1]]
end

#gzip(string) ⇒ Object

gzip compress data



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 985

def gzip(string)
  wio = StringIO.new("w")
  w_gz = Zlib::GzipWriter.new(wio, strategy = compression_strategy)
  w_gz.write(string)
  w_gz.close
  wio.string
end

#handle_last_seen_es_major_version ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 482

def handle_last_seen_es_major_version
  if @verify_es_version_at_startup && !dry_run?
    retry_operate(@max_retry_get_es_version,
                  @fail_on_detecting_es_version_retry_exceed,
                  @catch_transport_exception_on_retry) do
      detect_es_major_version
    end
  else
    nil
  end
end

#inject_chunk_id_to_record_if_needed(record, chunk_id) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 808

def inject_chunk_id_to_record_if_needed(record, chunk_id)
  if @metainfo&.include_chunk_id
    record[@metainfo.chunk_id_key] = chunk_id
    record
  else
    record
  end
end

#is_existing_connection(host) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 1093

def is_existing_connection(host)
  # check if the host provided match the current connection
  return false if @_es.nil?
  return false if @current_config.nil?
  return false if host.length != @current_config.length

  for i in 0...host.length
    if !host[i][:host].eql? @current_config[i][:host] || host[i][:port] != @current_config[i][:port]
      return false
    end
  end

  return true
end

#multi_workers_ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 804

def multi_workers_ready?
  true
end

#parse_time(value, event_time, tag) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 569

def parse_time(value, event_time, tag)
  @time_parser.call(value)
rescue => e
  router.emit_error_event(@time_parse_error_tag, Fluent::Engine.now, {'tag' => tag, 'time' => event_time, 'format' => @time_key_format, 'value' => value}, e)
  return Time.at(event_time).to_datetime
end

#placeholder?(name, param) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 438

def placeholder?(name, param)
  placeholder_validities = []
  placeholder_validators(name, param).each do |v|
    begin
      v.validate!
      placeholder_validities << true
    rescue Fluent::ConfigError => e
      log.debug("'#{name} #{param}' is tested built-in placeholder(s) but there is no valid placeholder(s). error: #{e}")
      placeholder_validities << false
    end
  end
  placeholder_validities.include?(true)
end

#placeholder_substitution_needed_for_template? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 993

def placeholder_substitution_needed_for_template?
  need_substitution = placeholder?(:host, @host.to_s) ||
    placeholder?(:index_name, @index_name.to_s) ||
    placeholder?(:template_name, @template_name.to_s) ||
    @customize_template&.values&.any? { |value| placeholder?(:customize_template, value.to_s) } ||
    placeholder?(:logstash_prefix, @logstash_prefix.to_s) ||
    placeholder?(:logstash_dateformat, @logstash_dateformat.to_s) ||
    placeholder?(:deflector_alias, @deflector_alias.to_s) ||
    placeholder?(:application_name, @application_name.to_s) ||
    placeholder?(:ilm_policy_id, @ilm_policy_id.to_s)
  log.debug("Need substitution: #{need_substitution}")
  need_substitution
end

#process_message(tag, meta, header, time, record, extracted_values) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 887

def process_message(tag, meta, header, time, record, extracted_values)
  logstash_prefix, logstash_dateformat, index_name, type_name, _template_name, _customize_template, _deflector_alias, application_name, pipeline, _ilm_policy_id = extracted_values

  if @flatten_hashes
    record = flatten_record(record)
  end

  dt = nil
  if @logstash_format || @include_timestamp
    if record.has_key?(TIMESTAMP_FIELD)
      rts = record[TIMESTAMP_FIELD]
      dt = parse_time(rts, time, tag)
    elsif record.has_key?(@time_key)
      rts = record[@time_key]
      dt = parse_time(rts, time, tag)
      record[TIMESTAMP_FIELD] = dt.iso8601(@time_precision) unless @time_key_exclude_timestamp
    else
      dt = Time.at(time).to_datetime
      record[TIMESTAMP_FIELD] = dt.iso8601(@time_precision)
    end
  end

  target_index_parent, target_index_child_key = @target_index_key ? get_parent_of(record, @target_index_key) : nil
  if target_index_parent && target_index_parent[target_index_child_key]
    target_index_alias = target_index = target_index_parent.delete(target_index_child_key)
  elsif @logstash_format
    dt = dt.new_offset(0) if @utc_index
    target_index = "#{logstash_prefix}#{@logstash_prefix_separator}#{dt.strftime(logstash_dateformat)}"
    target_index_alias = "#{logstash_prefix}#{@logstash_prefix_separator}#{application_name}#{@logstash_prefix_separator}#{dt.strftime(logstash_dateformat)}"
  else
    target_index_alias = target_index = index_name
  end

  # Change target_index to lower-case since Elasticsearch doesn't
  # allow upper-case characters in index names.
  target_index = target_index.downcase
  target_index_alias = target_index_alias.downcase
  if @include_tag_key
    record[@tag_key] = tag
  end

  target_type_parent, target_type_child_key = @target_type_key ? get_parent_of(record, @target_type_key) : nil
  if target_type_parent && target_type_parent[target_type_child_key]
    target_type = target_type_parent.delete(target_type_child_key)
    if @last_seen_major_version == 6
      log.warn "Detected ES 6.x: `@type_name` will be used as the document `_type`."
      target_type = type_name
    elsif @last_seen_major_version == 7
      log.warn "Detected ES 7.x: `_doc` will be used as the document `_type`."
      target_type = '_doc'.freeze
    elsif @last_seen_major_version >=8
      log.debug "Detected ES 8.x or above: document type will not be used."
      target_type = nil
    end
  else
    if @suppress_type_name && @last_seen_major_version >= 7
      target_type = nil
    elsif @last_seen_major_version == 7 && @type_name != DEFAULT_TYPE_NAME_ES_7x
      log.warn "Detected ES 7.x: `_doc` will be used as the document `_type`."
      target_type = '_doc'.freeze
    elsif @last_seen_major_version >= 8
      log.debug "Detected ES 8.x or above: document type will not be used."
      target_type = nil
    else
      target_type = type_name
    end
  end

  meta.clear
  meta["_index".freeze] = target_index
  meta["_type".freeze] = target_type unless @last_seen_major_version >= 8
  meta["_alias".freeze] = target_index_alias

  if @pipeline
    meta["pipeline".freeze] = pipeline
  end

  @meta_config_map.each do |record_accessor, meta_key|
    if raw_value = record_accessor.call(record)
      meta[meta_key] = raw_value
    end
  end

  if @remove_keys
    @remove_keys.each { |key| record.delete(key) }
  end

  return [meta, header, record]
end

#remove_keys(record) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 738

def remove_keys(record)
  keys = record[@remove_keys_on_update_key] || @remove_keys_on_update || []
  record.delete(@remove_keys_on_update_key)
  return record unless keys.any?
  record = record.dup
  keys.each { |key| record.delete(key) }
  record
end

#retry_stream_retryable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 1089

def retry_stream_retryable?
  @buffer.storable?
end

#send_bulk(data, tag, chunk, bulk_message_count, extracted_values, info) ⇒ Object

send_bulk given a specific bulk request, the original tag, chunk, and bulk_message_count



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 1039

def send_bulk(data, tag, chunk, bulk_message_count, extracted_values, info)
  _logstash_prefix, _logstash_dateformat, index_name, _type_name, template_name, customize_template, deflector_alias, application_name, _pipeline, ilm_policy_id = extracted_values
  if deflector_alias
    template_installation(deflector_alias, template_name, customize_template, application_name, index_name, ilm_policy_id, info.host)
  else
    template_installation(info.ilm_index, template_name, customize_template, application_name, @logstash_format ? info.ilm_alias : index_name, ilm_policy_id, info.host)
  end

  begin

    log.on_trace { log.trace "bulk request: #{data}" }

    prepared_data = if compression
                      gzip(data)
                    else
                      data
                    end

    response = client(info.host, compression).bulk body: prepared_data, index: info.index
    log.on_trace { log.trace "bulk response: #{response}" }

    if response['errors']
      error = Fluent::Plugin::ElasticsearchErrorHandler.new(self)
      error.handle_error(response, tag, chunk, bulk_message_count, extracted_values)
    end
  rescue RetryStreamError => e
    log.trace "router.emit_stream for retry stream doing..."
    emit_tag = @retry_tag ? @retry_tag : tag
    # check capacity of buffer space
    if retry_stream_retryable?
      router.emit_stream(emit_tag, e.retry_stream)
    else
      raise RetryStreamEmitFailure, "buffer is full."
    end
    log.trace "router.emit_stream for retry stream done."
  rescue => e
    ignore = @ignore_exception_classes.any? { |clazz| e.class <= clazz }

    log.warn "Exception ignored in tag #{tag}: #{e.class.name} #{e.message}" if ignore

    @_es = nil if @reconnect_on_error
    @_es_info = nil if @reconnect_on_error

    raise UnrecoverableRequestFailure if ignore && @exception_backup

    # FIXME: identify unrecoverable errors and raise UnrecoverableRequestFailure instead
    raise RecoverableRequestFailure, "could not push logs to Elasticsearch cluster (#{connection_options_description(info.host)}): #{e.message}" unless ignore
  end
end

#setup_api_key ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 424

def setup_api_key
  return {} unless @api_key

  { "Authorization" => "ApiKey " + Base64.strict_encode64(@api_key) }
end

#split_request?(bulk_message, info) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 875

def split_request?(bulk_message, info)
  # For safety.
end

#split_request_size_check?(bulk_message, info) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 879

def split_request_size_check?(bulk_message, info)
  bulk_message[info].size > @bulk_message_request_threshold
end

#split_request_size_uncheck?(bulk_message, info) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 883

def split_request_size_uncheck?(bulk_message, info)
  false
end

#template_installation(deflector_alias, template_name, customize_template, application_name, ilm_policy_id, target_index, host) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 1007

def template_installation(deflector_alias, template_name, customize_template, application_name, ilm_policy_id, target_index, host)
  # for safety.
end

#template_installation_actual(deflector_alias, template_name, customize_template, application_name, target_index, ilm_policy_id, host = nil) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 1011

def template_installation_actual(deflector_alias, template_name, customize_template, application_name, target_index, ilm_policy_id, host=nil)
  if template_name && @template_file
    if !@logstash_format && (deflector_alias.nil? || (@alias_indexes.include? deflector_alias)) && (@template_names.include? template_name)
      if deflector_alias
        log.debug("Index alias #{deflector_alias} and template #{template_name} already exist (cached)")
      else
        log.debug("Template #{template_name} already exists (cached)")
      end
    else
      retry_operate(@max_retry_putting_template,
                    @fail_on_putting_template_retry_exceed,
                    @catch_transport_exception_on_retry) do
        if customize_template
          template_custom_install(template_name, @template_file, @template_overwrite, customize_template, @enable_ilm, deflector_alias, ilm_policy_id, host, target_index, @index_separator)
        else
          template_install(template_name, @template_file, @template_overwrite, @enable_ilm, deflector_alias, ilm_policy_id, host, target_index, @index_separator)
        end
        ilm_policy = @ilm_policies[ilm_policy_id] || {}
        create_rollover_alias(target_index, @rollover_index, deflector_alias, application_name, @index_date_pattern, @index_separator, @enable_ilm, ilm_policy_id, ilm_policy, @ilm_policy_overwrite, host)
      end
      @alias_indexes << deflector_alias unless deflector_alias.nil?
      @template_names << template_name
    end
  end
end

#update_body(record, op) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 722

def update_body(record, op)
  update = remove_keys(record)
  if @suppress_doc_wrap
    return update
  end
  body = {"doc".freeze => update}
  if op == UPSERT_OP
    if update == record
      body["doc_as_upsert".freeze] = true
    else
      body[UPSERT_OP] = record
    end
  end
  body
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_elasticsearch.rb', line 817

def write(chunk)
  bulk_message_count = Hash.new { |h,k| h[k] = 0 }
  bulk_message = Hash.new { |h,k| h[k] = '' }
  header = {}
  meta = {}

  tag = chunk.metadata.tag
  chunk_id = dump_unique_id_hex(chunk.unique_id)
  extracted_values = expand_placeholders(chunk)
  host = if @hosts
           extract_placeholders(@hosts, chunk)
         else
           extract_placeholders(@host, chunk)
         end

  chunk.msgpack_each do |time, record|
    next unless record.is_a? Hash

    record = inject_chunk_id_to_record_if_needed(record, chunk_id)

    begin
      meta, header, record = process_message(tag, meta, header, time, record, extracted_values)
      info = if @include_index_in_url
               RequestInfo.new(host, meta.delete("_index".freeze), meta["_index".freeze], meta.delete("_alias".freeze))
             else
               RequestInfo.new(host, nil, meta["_index".freeze], meta.delete("_alias".freeze))
             end

      if split_request?(bulk_message, info)
        bulk_message.each do |info, msgs|
          send_bulk(msgs, tag, chunk, bulk_message_count[info], extracted_values, info) unless msgs.empty?
          msgs.clear
          # Clear bulk_message_count for this info.
          bulk_message_count[info] = 0;
          next
        end
      end

      if append_record_to_messages(@write_operation, meta, header, record, bulk_message[info])
        bulk_message_count[info] += 1;
      else
        if @emit_error_for_missing_id
          raise MissingIdFieldError, "Missing '_id' field. Write operation is #{@write_operation}"
        else
          log.on_debug { log.debug("Dropping record because its missing an '_id' field and write_operation is #{@write_operation}: #{record}") }
        end
      end
    rescue => e
      router.emit_error_event(tag, time, record, e)
    end
  end

  bulk_message.each do |info, msgs|
    send_bulk(msgs, tag, chunk, bulk_message_count[info], extracted_values, info) unless msgs.empty?
    msgs.clear
  end
end