Analysis of the modernization prospects of the WLCG monitoring framework's messaging subsystem

framework’s messaging subsystem V. Airiian# Dubna State University, Dubna, Russia Laboratory of Information Technologies, JINR ABSTRACT The purpose of the project is an analysis of the modernization prospects of the WLCG monitoring framework’s messaging subsystem based on Nagios monitoring software and Apache ActiveMQ technologies. The modernization process demands thorough examination of the existing subsystem to determine the vital upgrade requirements. Thus the work is focused on research of the main underlying technologies, the existing subsystem’s structure and revision of its design and used software. INTRODUCTION The issue of monitoring the state of the processes taking place in the information systems is an important part, and sometimes a prerequisite for their functioning. Worldwide LHC Computing Grid (WLCG) is a complex distributed information system and its proper functioning cannot be confirmed without a thorough monitoring of its state. To determine the modernization prospects of the WLCG monitoring framework’s messaging subsystem the next tasks were stated:  to study main underlying technologies;  to analyze the structure of the existing subsystem;  to consider the requirements for the modernization of the subsystem;  to revise the logic of the existing subsystem;  to introduce tools, software and testing framework. UNDERLYING TECHNOLOGIES One of the major ways to monitor the network infrastructure is to use a special monitoring software. Being the one, Nagios is employed to monitor hosts statuses of WLCG. It is an open-source application for network monitoring that uses the hybrid data collection mode and offers data access through standard OS interfaces [1]. Exchanging data between instances of Nagios requires the use of a message broker which is a program translating a message from the messaging protocol of the sender to