1 / 7

Lemon Monitoring System Overview: Enhancing Grid Operations at CERN

The Lemon Monitoring System, presented by Bill Tomlin at CERN's WLCG-OSG-EGEE Operations Workshop, offers a scalable, distributed monitoring framework for managing resources across large grid infrastructures. Designed to monitor up to 10,000 nodes and over 500 metrics—including nodes, DBs, power consumption, and VO jobs—it enables early error detection and automatic recovery actions. With a user-friendly web interface and integrated alarm systems, Lemon ensures operational efficiency. The system also supports site-specific integrations, facilitating effective fabric management for enhanced grid services.

stephen-navarro
Download Presentation

Lemon Monitoring System Overview: Enhancing Grid Operations at CERN

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Lemon Monitoring Presented by Bill Tomlin CERN-IT/FIO/FD WLCG-OSG-EGEE Operations Workshop CERN, 19-20 June 2006

  2. Lemon – LHC Era Monitoring • Distributed monitoring framework + default metrics • For nodes, DBs, power consumption, backups, VO jobs • Scalable to ~10k nodes, 500+ metrics • Early error detection and automatic recovery • Web interface • Integrated alarm system • Data persisted to Oracle, Oracle Express or flat files • Framework for plug-in sensors • Site independent: BARC, CERN IT+AB, FZK, IN2P3, INFN, RAL • GridICE based on LEMON (~180 sites) • Easy to install out of the box • Well documented at http://www.cern.ch/lemon WLCG-OSG-EGEE Operations Workshop

  3. Repository backend Prot RRDTool / PHP Correlation Engines SOAP SOAP apache TCP/UDP HTTP Monitoring Repository Monitoring Agent Nodes Lemon CLI Web browser Sensor Sensor Sensor User Lemon architecture WLCG-OSG-EGEE Operations Workshop

  4. Automatic Recovery Actions • Actuator called for defined conditions • Complex correlations: m1 > m2 – 50 and m3 < m4 • Retry n times before raising an alarm; • All actions logged, including success/failure • Example: ssh daemon dead – action /sbin/service sshd start • ~62 corrective actions defined WLCG-OSG-EGEE Operations Workshop

  5. Web Interface WLCG-OSG-EGEE Operations Workshop

  6. LEMON Alarm System • Oracle based • AJAX web based GUI • Oracle PL/SQL based business logic (reductions of alarms for operators) • Notifications: RSS feeds, e-mail, SMS • Integrated with quattor and State Management System • Plug-ins for site-specific integration e.g. Remedy • Phasing in Lemon Alarm System (August 2006) • Ongoing work WLCG-OSG-EGEE Operations Workshop

  7. Summary • Can re-use whole or part of LEMON • Good fabric management essential to providing good grid services • Queries to: project-lemon@cern.ch • More details: http://www.cern.ch/lemon • LEMON tutorial at CERN on 22nd of September WLCG-OSG-EGEE Operations Workshop

More Related