Class: Fluent::SwiftOutput

Inherits:
TimeSlicedOutput
  • Object
show all
Includes:
Mixin::ConfigPlaceholders, SetTagKeyMixin, SetTimeKeyMixin
Defined in:
lib/fluent/plugin/out_swift.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ SwiftOutput

Returns a new instance of SwiftOutput.



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# File 'lib/fluent/plugin/out_swift.rb', line 8

def initialize
  super
  require 'fog'
  require 'zlib'
  require 'time'
  require 'tempfile'
  require 'open3'
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_swift.rb', line 48

def configure(conf)
  super

  if format_json = conf['format_json']
    @format_json = true
  else
    @format_json = false
  end

  @ext, @mime_type = case @store_as
    when 'gzip' then ['gz', 'application/x-gzip']
    when 'lzo' then
      begin
        Open3.capture3('lzop -V')
      rescue Errno::ENOENT
        raise ConfigError, "'lzop' utility must be in PATH for LZO compression"
      end
      ['lzo', 'application/x-lzop']
    when 'json' then ['json', 'application/json']
    else ['txt', 'text/plain']
  end

  @timef = TimeFormatter.new(@time_format, @localtime)

  if @localtime
    @path_slicer = Proc.new {|path|
      Time.now.strftime(path)
    }
  else
    @path_slicer = Proc.new {|path|
      Time.now.utc.strftime(path)
    }
  end
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_swift.rb', line 99

def format(tag, time, record)
  if @include_time_key || !@format_json
    time_str = @timef.format(time)
  end

  # copied from each mixin because current TimeSlicedOutput can't support mixins.
  if @include_tag_key
    record[@tag_key] = tag
  end
  if @include_time_key
    record[@time_key] = time_str
  end

  if @format_json
    Yajl.dump(record) + "\n"
  else
    "#{time_str}\t#{tag}\t#{Yajl.dump(record)}\n"
  end
end

#placeholders ⇒ Object 



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# File 'lib/fluent/plugin/out_swift.rb', line 44

def placeholders
  [:percent]
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_swift.rb', line 83

def start
  super

  Excon.defaults[:ssl_verify_peer] = @ssl_verify

  @storage = Fog::Storage.new :provider => 'OpenStack',
                    :openstack_auth_url => @auth_url,
                    :openstack_username => @auth_user,
                    :openstack_tenant => @auth_tenant,
                    :openstack_api_key => @auth_api_key,
                    :openstack_region => @auth_region
  @storage. @swift_account if @swift_account

  check_container
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_swift.rb', line 119

def write(chunk)
  i = 0

  begin
    path = @path_slicer.call(@path)
    values_for_swift_object_key = {
      "path" => path,
      "time_slice" => chunk.key,
      "file_extension" => @ext,
      "index" => i
    }
    swift_path = @swift_object_key_format.gsub(%r(%{[^}]+})) { |expr|
      values_for_swift_object_key[expr[2...expr.size-1]]
    }
    i += 1
  end while check_object_exists(@swift_container, swift_path)

  tmp = Tempfile.new("swift-")
  begin
    if @store_as == "gzip"
      w = Zlib::GzipWriter.new(tmp)
      chunk.write_to(w)
      w.close
    elsif @store_as == "lzo"
      w = Tempfile.new("chunk-tmp")
      chunk.write_to(w)
      w.close
      tmp.close
      # We don't check the return code because we can't recover lzop failure.
      system "lzop -qf1 -o #{tmp.path} #{w.path}"
    else
      chunk.write_to(tmp)
      tmp.close
    end
    File.open(tmp.path) do |file|
      @storage.put_object(@swift_container, swift_path, file, {:content_type => @mime_type})
    end
    $log.info "Put Log to Swift. container=#{@swift_container} object=#{swift_path}"
  ensure
    tmp.close(true) rescue nil
    w.close rescue nil
    w.unlink rescue nil
  end
end