Class: Fluent::Plugin::OpenSearchOutput

Inherits:
Output
  • Object
show all
Includes:
OpenSearchIndexTemplate, OpenSearchConstants, OpenSearchTLS
Defined in:
lib/fluent/plugin/out_opensearch.rb

Direct Known Subclasses

OpenSearchOutputDataStream

Defined Under Namespace

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

Constant Summary collapse

DEFAULT_BUFFER_TYPE = 
"memory"
DEFAULT_OPENSEARCH_VERSION = 
1
DEFAULT_TYPE_NAME = 
"_doc".freeze
DEFAULT_RELOAD_AFTER = 
-1
DEFAULT_TARGET_BULK_BYTES = 
-1
DEFAULT_POLICY_ID = 
"logstash-policy"

Constants included from OpenSearchTLS

Fluent::Plugin::OpenSearchTLS::DEFAULT_VERSION, Fluent::Plugin::OpenSearchTLS::SUPPORTED_TLS_VERSIONS

Constants included from OpenSearchConstants

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from OpenSearchTLS

included, #set_tls_minmax_version_config

Methods included from OpenSearchIndexTemplate

#get_custom_template, #get_template, #host_unreachable_exceptions, #indexcreation, #retry_operate, #rollover_alias_payload, #template_custom_install, #template_exists?, #template_install, #template_put, #templates_hash_install

Constructor Details

#initialize ⇒ OpenSearchOutput

Returns a new instance of OpenSearchOutput.



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# File 'lib/fluent/plugin/out_opensearch.rb', line 212

def initialize
  super
end

Instance Attribute Details

#compressable_connection ⇒ Object (readonly)

Returns the value of attribute compressable_connection.



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# File 'lib/fluent/plugin/out_opensearch.rb', line 85

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_opensearch.rb', line 84

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_opensearch.rb', line 83

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 OpenSearch. 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_opensearch.rb', line 751

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

#aws_credentials(conf) ⇒ Object

This creating AWS credentials code part is heavily based on fluent-plugin-aws-elasticsearch-service: github.com/atomita/fluent-plugin-aws-elasticsearch-service/blob/master/lib/fluent/plugin/out_aws-elasticsearch-service.rb#L73-L134



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# File 'lib/fluent/plugin/out_opensearch.rb', line 220

def aws_credentials(conf)
  credentials = nil
  unless conf[:access_key_id].empty? || conf[:secret_access_key].empty?
    credentials = Aws::Credentials.new(conf[:access_key_id], conf[:secret_access_key])
  else
    if conf[:assume_role_arn].nil?
      aws_container_credentials_relative_uri = conf[:ecs_container_credentials_relative_uri] || ENV["AWS_CONTAINER_CREDENTIALS_RELATIVE_URI"]
      if aws_container_credentials_relative_uri.nil?
        credentials = Aws::SharedCredentials.new({retries: 2}).credentials rescue nil
        credentials ||= Aws::InstanceProfileCredentials.new.credentials rescue nil
        credentials ||= Aws::ECSCredentials.new.credentials
      else
        credentials = Aws::ECSCredentials.new({
                        credential_path: aws_container_credentials_relative_uri
                      }).credentials
      end
    else
      if conf[:assume_role_web_identity_token_file].nil?
        credentials = Aws::AssumeRoleCredentials.new({
                        role_arn: conf[:assume_role_arn],
                        role_session_name: conf[:assume_role_session_name],
                        region: sts_creds_region(conf)
                      }).credentials
      else
        credentials = Aws::AssumeRoleWebIdentityCredentials.new({
                        role_arn: conf[:assume_role_arn],
                        web_identity_token_file: conf[:assume_role_web_identity_token_file],
                        region: sts_creds_region(conf)
                      }).credentials
      end
    end
  end
  raise "No valid AWS credentials found." unless credentials.set?

  credentials
end

#backend_options ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 512

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 'faraday/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_opensearch.rb', line 617

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

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

  @_os ||= begin
    @compressable_connection = compress_connection
    @current_config = connection_options[:hosts].clone
    adapter_conf = if @endpoint
                     lambda do |f|
                       f.request(
                         :aws_sigv4,
                         service: @endpoint.aws_service_name.to_s,
                         region: @endpoint.region,
                         credentials: @_aws_credentials,
                       )

                       f.adapter @http_backend, @backend_options
                     end
                   else
                     lambda {|f| f.adapter @http_backend, @backend_options }
                   end

    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 = {}.merge(@custom_headers)
                .merge(gzip_headers)
    ssl_options = { verify: @ssl_verify, ca_file: @ca_file}.merge(@ssl_version_options)

    transport = OpenSearch::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)
    OpenSearch::Client.new transport: transport
  end
end

#client_library_version ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 550

def client_library_version
  OpenSearch::VERSION
end

#compression ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 495

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

#compression_strategy ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 499

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

AWS credential part is ended.

Raises:

  • (Fluent::ConfigError) 


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# File 'lib/fluent/plugin/out_opensearch.rb', line 264

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

  super

  if @endpoint
    # here overrides default value of reload_connections to false because
    # AWS Elasticsearch Service doesn't return addresses of nodes and Elasticsearch client
    # fails to reload connections properly. This ends up "temporarily failed to flush the buffer"
    # error repeating forever. See this discussion for details:
    # https://discuss.elastic.co/t/elasitcsearch-ruby-raises-cannot-get-new-connection-from-pool-error/36252
    @reload_connections = false
  end

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

  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_os_version' must be greater than or equal to zero." if @max_retry_get_os_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_os_version_at_startup
      raise Fluent::ConfigError, "host placeholder, template installation, and verify OpenSearch version at startup are exclusive feature at same time. Please specify verify_os_version_at_startup as `false` when host placeholder and template installation are enabled."
    end
    log.info "host placeholder and template installation makes your OpenSearch cluster a bit slow down(beta)."
  end

  @template_names = []
  if !dry_run?
    if @template_name && @template_file
      if @logstash_format || placeholder_substitution_needed_for_template?
        class << self
          alias_method :template_installation, :template_installation_actual
        end
      else
        template_installation_actual(@template_name, @customize_template, @application_name, @index_name)
      end
    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_opensearch_truncate_caches, @truncate_caches_interval) do
      log.info('Clean up the indices and template names cache')

      @truncate_mutex.synchronize {
        @template_names.clear
      }
    end
  end
  # If AWS credentials is set, consider to expire credentials information forcibly before expired.
  @credential_mutex = Mutex.new
  if @endpoint
    @_aws_credentials = aws_credentials(@endpoint)

    if @endpoint.refresh_credentials_interval
      timer_execute(:out_opensearch_expire_credentials, @endpoint.refresh_credentials_interval) do
        log.debug('Recreate the AWS credentials')

        @credential_mutex.synchronize do
          @_os = nil
          begin
            @_aws_credentials = aws_credentials(@endpoint)
          rescue => e
            log.error("Failed to get new AWS credentials: #{e}")
          end
        end
      end
    end
  end

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

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

  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_os_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_os_major_version
                               major_version
                             else
                               @default_opensearch_version
                             end

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

  if @last_seen_major_version >= 1
    case @ssl_version
    when :SSLv23, :TLSv1, :TLSv1_1
      if @scheme == :https
        log.warn "Detected OpenSearch 1.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
end

#configure_routing_key_name ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 554

def configure_routing_key_name
  'routing'.freeze
end

#connection_options_description(con_host = nil) ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 736

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_opensearch.rb', line 558

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_opensearch.rb', line 603

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_opensearch.rb', line 565

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_opensearch.rb', line 576

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_os_major_version ⇒ Object 



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

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

#dry_run? ⇒ Boolean

Returns:

  • (Boolean) 


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

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

#emit_error_label_event? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_opensearch.rb', line 491

def emit_error_label_event?
  !!@emit_error_label_event
end

#expand_placeholders(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 816

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 @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 @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
  return logstash_prefix, logstash_dateformat, index_name, template_name, customize_template, application_name, pipeline
end

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



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# File 'lib/fluent/plugin/out_opensearch.rb', line 801

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_affinity_target_indices(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 921

def get_affinity_target_indices(chunk)
  indices = Hash.new
  if target_index_affinity_enabled?()
    id_key_accessor = record_accessor_create(@id_key)
    ids = Set.new
    chunk.msgpack_each do |time, record|
      next unless record.is_a? Hash
      begin
        ids << id_key_accessor.call(record)
      end
    end
    log.debug("Find affinity target_indices by quering on OpenSearch (write_operation #{@write_operation}) for ids: #{ids.to_a}")
    options = {
      :index => "#{logstash_prefix}#{@logstash_prefix_separator}*",
    }
    query = {
      'query' => { 'ids' => { 'values' => ids.to_a } },
      '_source' => false,
      'sort' => [
        {"_index" => {"order" => "desc"}}
     ]
    }
    result = client.search(options.merge(:body => Yajl.dump(query)))
    # There should be just one hit per _id, but in case there still is multiple, just the oldest index is stored to map
    result['hits']['hits'].each do |hit|
      indices[hit["_id"]] = hit["_index"]
      log.debug("target_index for id: #{hit["_id"]} from es: #{hit["_index"]}")
    end
  end
  indices
end

#get_connection_options(con_host = nil) ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 693

def get_connection_options(con_host=nil)

  hosts = if @endpoint # For AWS OpenSearch Service
    uri = URI(@endpoint.url)
    host = %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
    [host]
  elsif 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
    if Resolv::IPv6::Regex.match(@host)
      [{host: "[#{@host}]", scheme: @scheme.to_s, port: @port}]
    else
      [{host: @host, port: @port, scheme: @scheme.to_s}]
    end
  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_opensearch.rb', line 681

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_opensearch.rb', line 1046

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_opensearch.rb', line 1052

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_os_major_version ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 525

def handle_last_seen_os_major_version
  if @verify_os_version_at_startup && !dry_run?
    retry_operate(@max_retry_get_os_version,
                  @fail_on_detecting_os_version_retry_exceed,
                  @catch_transport_exception_on_retry) do
      detect_os_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_opensearch.rb', line 847

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_opensearch.rb', line 1147

def is_existing_connection(host)
  # check if the host provided match the current connection
  return false if @_os.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_opensearch.rb', line 843

def multi_workers_ready?
  true
end

#parse_time(value, event_time, tag) ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 608

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

#placeholder?(name, param) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_opensearch.rb', line 477

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_opensearch.rb', line 1060

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?(:application_name, @application_name.to_s) ||
  log.debug("Need substitution: #{need_substitution}")
  need_substitution
end

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



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# File 'lib/fluent/plugin/out_opensearch.rb', line 965

def process_message(tag, meta, header, time, record, affinity_target_indices, extracted_values)
  logstash_prefix, logstash_dateformat, index_name, _template_name, _customize_template, application_name, pipeline = 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 OpenSearch 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

  # If affinity target indices map has value for this particular id, use it as target_index
  if !affinity_target_indices.empty?
    id_accessor = record_accessor_create(@id_key)
    id_value = id_accessor.call(record)
    if affinity_target_indices.key?(id_value)
      target_index = affinity_target_indices[id_value]
    end
  end

  if @suppress_type_name || @last_seen_major_version >= 2
    target_type = nil
  else
    # OpenSearch only supports "_doc".
    target_type = DEFAULT_TYPE_NAME
  end

  meta.clear
  meta["_index".freeze] = target_index
  meta["_type".freeze] = target_type unless target_type.nil?
  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_opensearch.rb', line 792

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_opensearch.rb', line 1143

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_opensearch.rb', line 1097

def send_bulk(data, tag, chunk, bulk_message_count, extracted_values, info)
  _logstash_prefix, _logstash_dateformat, index_name, template_name, customize_template, application_name, _pipeline  = extracted_values
  template_installation(template_name, customize_template, application_name, index_name, info.host)

  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::OpenSearchErrorHandler.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

    @_os = nil if @reconnect_on_error
    @_os_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 OpenSearch cluster (#{connection_options_description(info.host)}): #{e.message}" unless ignore
  end
end

#split_request?(bulk_message, info) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_opensearch.rb', line 953

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_opensearch.rb', line 957

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_opensearch.rb', line 961

def split_request_size_uncheck?(bulk_message, info)
  false
end

#sts_creds_region(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 257

def sts_creds_region(conf)
  conf[:sts_credentials_region] || conf[:region]
end

#target_index_affinity_enabled? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_opensearch.rb', line 917

def target_index_affinity_enabled?()
  @target_index_affinity && @logstash_format && @id_key && (@write_operation == UPDATE_OP || @write_operation == UPSERT_OP)
end

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



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# File 'lib/fluent/plugin/out_opensearch.rb', line 1072

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

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



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# File 'lib/fluent/plugin/out_opensearch.rb', line 1076

def template_installation_actual(template_name, customize_template, application_name, target_index, host=nil)
  if template_name && @template_file
    if !@logstash_format && @template_names.include?(template_name)
      log.debug("Template #{template_name} already exists (cached)")
    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, host, target_index, @index_separator)
        else
          template_install(template_name, @template_file, @template_overwrite, host, target_index, @index_separator)
        end
      end
      @template_names << template_name
    end
  end
end

#update_body(record, op) ⇒ Object 



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# File 'lib/fluent/plugin/out_opensearch.rb', line 776

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_opensearch.rb', line 856

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

  affinity_target_indices = get_affinity_target_indices(chunk)
  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, affinity_target_indices, 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
      if emit_error_label_event?
        router.emit_error_event(tag, time, record, e)
      end
    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