Logstash filter configuration to read all incoming fields and make them available for consumption

filterAllFields.rb

filter {
    ruby {
        code => "
            require 'json'
            if event['type'] == 'syslog'
                  eventJson = event.to_hash
                  if eventJson.has_key?('@version')
                         eventJson.delete('@version')
                  end
                  if eventJson.has_key?('type')
                         eventJson.delete('type')
                  end
                  event['message'] = eventJson.to_json.gsub!(/\"/, '\'')
            end
            "
    }
}