Class: Fluent::HekkRedshiftOutput

Inherits:
BufferedOutput
  • Object
show all
Defined in:
lib/fluent/plugin/out_hekk_redshift.rb

Constant Summary collapse

IGNORE_REDSHIFT_ERROR_REGEXP =

ignore load table error. (invalid data format)

/^ERROR:  Load into table '[^']+' failed\./

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HekkRedshiftOutput

Returns a new instance of HekkRedshiftOutput.



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# File 'lib/fluent/plugin/out_hekk_redshift.rb', line 9

def initialize
  super
  require 'aws-sdk'
  require 'zlib'
  require 'time'
  require 'tempfile'
  require 'pg'
  require 'json'
  require 'csv'
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_hekk_redshift.rb', line 47

def configure(conf)
  super
  @path = "#{@path}/" unless @path.end_with?('/') # append last slash
  @path = @path[1..-1] if @path.start_with?('/')  # remove head slash
  @utc = true if conf['utc']
  @db_conf = {
    host:@redshift_host,
    port:@redshift_port,
    dbname:@redshift_dbname,
    user:@redshift_user,
    password:@redshift_password
  }
  @delimiter = determine_delimiter(@file_type) if @delimiter.nil? or @delimiter.empty?
  $log.debug format_log("redshift file_type:#{@file_type} delimiter:'#{@delimiter}'")
  @copy_sql_template = "copy #{table_name_with_schema} from '%s' CREDENTIALS 'aws_access_key_id=#{@aws_key_id};aws_secret_access_key=%s' delimiter '#{@delimiter}' GZIP ESCAPE #{@redshift_copy_base_options} #{@redshift_copy_options};"
  @insert_sql_template = "insert into #{@redshift_copy_command_tablename}(#{@redshift_copy_command_columnname}) values('%s');"
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_hekk_redshift.rb', line 77

def format(tag, time, record)
  if json?
    record.to_msgpack
  elsif msgpack?
    { @record_log_tag => record }.to_msgpack
  else
    "#{record[@record_log_tag]}\n"
  end
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_hekk_redshift.rb', line 65

def start
  super
  # init s3 conf
  options = {
    :access_key_id     => @aws_key_id,
    :secret_access_key => @aws_sec_key
  }
  options[:s3_endpoint] = @s3_endpoint if @s3_endpoint
  @s3 = AWS::S3.new(options)
  @bucket = @s3.buckets[@s3_bucket]
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_hekk_redshift.rb', line 87

def write(chunk)
  $log.debug format_log('start creating gz.')

  # create a gz file
  tmp = Tempfile.new('s3-')
  tmp =
    if json? || msgpack?
      create_gz_file_from_structured_data(tmp, chunk, @delimiter)
    else
      create_gz_file_from_flat_data(tmp, chunk)
    end

  # no data -> skip
  unless tmp
    $log.debug format_log('received no valid data. ')
    return false # for debug
  end

  # create a file path with time format
  s3path = create_s3path(@bucket, @path)

  # upload gz to s3
  @bucket.objects[s3path].write(Pathname.new(tmp.path),
                                :acl => :bucket_owner_full_control)

  # close temp file
  tmp.close!

  # copy gz on s3 to redshift
  s3_uri = "s3://#{@s3_bucket}/#{s3path}"
  copy_sql = @copy_sql_template % [s3_uri, @aws_sec_key]
  sql = @insert_sql_template % [copy_sql.gsub(/'/, "\\\\'")]
  insert_sql_to_redshift(sql)
  true # for debug
end