Class: Fluent::Plugin::S3Output

Inherits:
Output
  • Object
show all
Defined in:
lib/fluent/plugin/out_s3.rb,
lib/fluent/plugin/s3_compressor_lzo.rb,
lib/fluent/plugin/s3_compressor_lzma2.rb,
lib/fluent/plugin/s3_compressor_gzip_command.rb

Defined Under Namespace

Classes: Compressor, GzipCommandCompressor, GzipCompressor, JsonCompressor, LZMA2Compressor, LZOCompressor, TextCompressor

Constant Summary collapse

DEFAULT_FORMAT_TYPE = 
"out_file"
MAX_HEX_RANDOM_LENGTH = 
16

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ S3Output

Returns a new instance of S3Output.



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# File 'lib/fluent/plugin/out_s3.rb', line 16

def initialize
  super
  @compressor = nil
  @uuid_flush_enabled = false
end

Instance Attribute Details

#bucket ⇒ Object (readonly)

Returns the value of attribute bucket.



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# File 'lib/fluent/plugin/out_s3.rb', line 172

def bucket
  @bucket
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_s3.rb', line 176

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

  super

  Aws.use_bundled_cert! if @use_bundled_cert

  if @s3_endpoint && (@s3_endpoint.end_with?('amazonaws.com') && !['fips', 'gov'].any? { |e| @s3_endpoint.include?(e) })
    raise Fluent::ConfigError, "s3_endpoint parameter is not supported for S3, use s3_region instead. This parameter is for S3 compatible services"
  end

  begin
    buffer_type = @buffer_config[:@type]
    @compressor = COMPRESSOR_REGISTRY.lookup(@store_as).new(buffer_type: buffer_type, log: log)
  rescue => e
    log.warn "'#{@store_as}' not supported. Use 'text' instead: error = #{e.message}"
    @compressor = TextCompressor.new
  end
  @compressor.configure(conf)

  @formatter = formatter_create

  if @hex_random_length > MAX_HEX_RANDOM_LENGTH
    raise Fluent::ConfigError, "hex_random_length parameter must be less than or equal to #{MAX_HEX_RANDOM_LENGTH}"
  end

  unless @index_format =~ /^%(0\d*)?[dxX]$/
    raise Fluent::ConfigError, "index_format parameter should follow `%[flags][width]type`. `0` is the only supported flag, and is mandatory if width is specified. `d`, `x` and `X` are supported types"
  end

  if @reduced_redundancy
    log.warn "reduced_redundancy parameter is deprecated. Use storage_class parameter instead"
    @storage_class = "REDUCED_REDUNDANCY"
  end

  @s3_object_key_format = process_s3_object_key_format
  if !@check_object
    if conf.has_key?('s3_object_key_format')
      log.warn "Set 'check_object false' and s3_object_key_format is specified. Check s3_object_key_format is unique in each write. If not, existing file will be overwritten."
    else
      log.warn "Set 'check_object false' and s3_object_key_format is not specified. Use '%{path}/%{time_slice}_%{hms_slice}.%{file_extension}' for s3_object_key_format"
      @s3_object_key_format = "%{path}/%{time_slice}_%{hms_slice}.%{file_extension}"
    end
  end

  check_s3_path_safety(conf)

  # For backward compatibility
  # TODO: Remove time_slice_format when end of support compat_parameters
  @configured_time_slice_format = conf['time_slice_format']
  @values_for_s3_object_chunk = {}
  @time_slice_with_tz = Fluent::Timezone.formatter(@timekey_zone, @configured_time_slice_format || timekey_to_timeformat(@buffer_config['timekey']))
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_s3.rb', line 261

def format(tag, time, record)
  r = inject_values_to_record(tag, time, record)
  @formatter.format(tag, time, r)
end

#multi_workers_ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_s3.rb', line 230

def multi_workers_ready?
  true
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_s3.rb', line 234

def start
  options = setup_credentials
  options[:region] = @s3_region if @s3_region
  options[:endpoint] = @s3_endpoint if @s3_endpoint
  options[:use_accelerate_endpoint] = @enable_transfer_acceleration
  options[:use_dualstack_endpoint] = @enable_dual_stack
  options[:http_proxy] = @proxy_uri if @proxy_uri
  options[:force_path_style] = @force_path_style
  options[:compute_checksums] = @compute_checksums unless @compute_checksums.nil?
  options[:signature_version] = @signature_version unless @signature_version.nil?
  options[:ssl_verify_peer] = @ssl_verify_peer
  log.on_trace do
    options[:http_wire_trace] = true
    options[:logger] = log
  end

  s3_client = Aws::S3::Client.new(options)
  @s3 = Aws::S3::Resource.new(client: s3_client)
  @bucket = @s3.bucket(@s3_bucket)

  check_apikeys if @check_apikey_on_start
  ensure_bucket if @check_bucket
  ensure_bucket_lifecycle

  super
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_s3.rb', line 266

def write(chunk)
  i = 0
  metadata = chunk.metadata
  previous_path = nil
  time_slice = if metadata.timekey.nil?
                 ''.freeze
               else
                 @time_slice_with_tz.call(metadata.timekey)
               end

  if @check_object
    begin
      @values_for_s3_object_chunk[chunk.unique_id] ||= {
        "%{hex_random}" => hex_random(chunk),
      }
      values_for_s3_object_key_pre = {
        "%{path}" => @path,
        "%{file_extension}" => @compressor.ext,
      }
      values_for_s3_object_key_post = {
        "%{time_slice}" => time_slice,
        "%{index}" => sprintf(@index_format,i),
      }.merge!(@values_for_s3_object_chunk[chunk.unique_id])
      values_for_s3_object_key_post["%{uuid_flush}".freeze] = uuid_random if @uuid_flush_enabled

      s3path = @s3_object_key_format.gsub(%r(%{[^}]+})) do |matched_key|
        values_for_s3_object_key_pre.fetch(matched_key, matched_key)
      end
      s3path = extract_placeholders(s3path, chunk)
      s3path = s3path.gsub(%r(%{[^}]+}), values_for_s3_object_key_post)
      if (i > 0) && (s3path == previous_path)
        if @overwrite
          log.warn "#{s3path} already exists, but will overwrite"
          break
        else
          raise "duplicated path is generated. use %{index} in s3_object_key_format: path = #{s3path}"
        end
      end

      i += 1
      previous_path = s3path
    end while @bucket.object(s3path).exists?
  else
    if @localtime
      hms_slicer = Time.now.strftime("%H%M%S")
    else
      hms_slicer = Time.now.utc.strftime("%H%M%S")
    end

    @values_for_s3_object_chunk[chunk.unique_id] ||= {
      "%{hex_random}" => hex_random(chunk),
    }
    values_for_s3_object_key_pre = {
      "%{path}" => @path,
      "%{file_extension}" => @compressor.ext,
    }
    values_for_s3_object_key_post = {
      "%{date_slice}" => time_slice,  # For backward compatibility
      "%{time_slice}" => time_slice,
      "%{hms_slice}" => hms_slicer,
    }.merge!(@values_for_s3_object_chunk[chunk.unique_id])
    values_for_s3_object_key_post["%{uuid_flush}".freeze] = uuid_random if @uuid_flush_enabled

    s3path = @s3_object_key_format.gsub(%r(%{[^}]+})) do |matched_key|
      values_for_s3_object_key_pre.fetch(matched_key, matched_key)
    end
    s3path = extract_placeholders(s3path, chunk)
    s3path = s3path.gsub(%r(%{[^}]+}), values_for_s3_object_key_post)
  end

  tmp = Tempfile.new("s3-")
  tmp.binmode
  begin
    @compressor.compress(chunk, tmp)
    tmp.rewind
    log.debug "out_s3: write chunk #{dump_unique_id_hex(chunk.unique_id)} with metadata #{chunk.metadata} to s3://#{@s3_bucket}/#{s3path}"

    put_options = {
      body: tmp,
      content_type: @compressor.content_type,
      storage_class: @storage_class,
    }
    put_options[:server_side_encryption] = @use_server_side_encryption if @use_server_side_encryption
    put_options[:ssekms_key_id] = @ssekms_key_id if @ssekms_key_id
    put_options[:sse_customer_algorithm] = @sse_customer_algorithm if @sse_customer_algorithm
    put_options[:sse_customer_key] = @sse_customer_key if @sse_customer_key
    put_options[:sse_customer_key_md5] = @sse_customer_key_md5 if @sse_customer_key_md5
    put_options[:acl] = @acl if @acl
    put_options[:grant_full_control] = @grant_full_control if @grant_full_control
    put_options[:grant_read] = @grant_read if @grant_read
    put_options[:grant_read_acp] = @grant_read_acp if @grant_read_acp
    put_options[:grant_write_acp] = @grant_write_acp if @grant_write_acp

    if @s3_metadata
      put_options[:metadata] = {}
      @s3_metadata.each do |k, v|
        put_options[:metadata][k] = extract_placeholders(v, chunk).gsub(%r(%{[^}]+}), {"%{index}" => sprintf(@index_format, i - 1)})
      end
    end
    @bucket.object(s3path).put(put_options)

    @values_for_s3_object_chunk.delete(chunk.unique_id)

    if @warn_for_delay
      if Time.at(chunk.metadata.timekey) < Time.now - @warn_for_delay
        log.warn "out_s3: delayed events were put to s3://#{@s3_bucket}/#{s3path}"
      end
    end
  ensure
    tmp.close(true) rescue nil
  end
end