fluentd_log.rb

#!/usr/bin/env ruby

require 'rubygems'
require 'fluent-logger'

def fluent_log project, script_name, message
  Fluent::Logger::FluentLogger.open(nil, :host=>'localhost', :port=>24224)
  Fluent::Logger.post("mongo.log", {:project => project, :script_name => script_name, :message => message })
end

fluent_log "Library", "Update books", "Completed"