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Practical Guide to Using EGEE Middleware: Simple Job Submission and Grid Services

This tutorial offers a hands-on approach to utilizing the EGEE middleware for job submission and accessing grid services. Participants will learn to navigate the Command-Line Interfaces on a User Interface (UI) machine, utilizing the GILDA testbed. The session covers essential steps such as obtaining certificates, connecting to the grid, and using SSH tools like PuTTY. Attendees will also explore practical exercises to illustrate job submission processes on the grid, focusing on the GILDA virtual organization (VO). Ideal for beginners and those new to Linux, this tutorial aims to empower users with practical skills for grid computing.

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Practical Guide to Using EGEE Middleware: Simple Job Submission and Grid Services

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  1. Practical using EGEE middleware:AA and simple job submission PeiYing Yao, Application team, ASGC

  2. Tutorial room machines Our setup ssh UI glite-tutor.ct.infn.it Internet LFC …. WMS VOMS Grid services CE CE

  3. Scope • The practical exercises are to illustrate “how” • Not using typical jobs for running on a grid!! • But to show how grid services are used, jobs are submitted, output retrieved,… • We will use the Command-Line Interfaces on a “User Interface” (UI) machine • “UI” is your interface to the GILDA Grid • Client tools are already installed • We are using the GILDA testbed today • The production EGEE grid looks like this! • Current EGEE production middleware • GILDA is one VO on EGEE  resources for training and prototyping

  4. To use the EGEE grid • Get an internationally recognised certificate • From a local “Registration Authority” – you will need to see them personally, bringing passport or other identification • Contact the virtual organisation (VO) manager • Accept the VO and the EGEE conditions of use • The VO manager authorises you to use resources • Upload your certificate to a “User Interface” machine • We are continuing the practical from this stage • You are a member of the GILDA VO • We have training certificates on the GILDA testbed

  5. Using GILDA • If you are new to Linux – or if you prefer – work in pairs • You will need to edit files and use command-line interfaces • If you have Windows OS on the laptop, please download putty.exe with this link • http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe

  6. Logging on to GILDA • Tutors will assign you a user number • Then use putty or ssh to connect to glite-tutor.ct.infn.it • usernames --> taipei01....taipei40 • passwords --> GridTAI01....GridTAI40 • Private Key passphrase: TAIPEI • ALWAYS USE THE SAME ACCOUNT DURING ALL OF THIS EVENT – REMEMBER YOUR NUMBER!! Wireless Network SSID : ISGC 2007 http://t-ap41.grid.sinica.edu.tw/exercise/cert_simple_job.html

  7. How to start putty • Download putty.exe • Run putty (double click the icon) • Type Host Name • Select SSH protocol • Click Open button

  8. AA : References • VOMS on EGEE: User Guide available at http://glite.web.cern.ch/glite/documentation/default.asp • VOMS • Available at http://infnforge.cnaf.infn.it/voms/ • Alfieri, Cecchini, Ciaschini, Spataro, dell'Agnello, Fronher, Lorentey, From gridmap-file to VOMS: managing Authorization in a Grid environment • Vincenzo Ciaschini, A VOMS Attribute Certificate Profile for Authorization • GSI • Available at www.globus.org • A Security Architecture for Computational Grids. I. Foster, C. Kesselman, G. Tsudik, S. Tuecke. Proc. 5th ACM Conference on Computer and Communications Security Conference, pp. 83-92, 1998. • A National-Scale Authentication Infrastructure. R. Butler, D. Engert, I. Foster, C. Kesselman, S. Tuecke, J. Volmer, V. Welch. IEEE Computer, 33(12):60-66, 2000.

  9. WMS : References WMS User's Guide • https://edms.cern.ch/file/572489/1/EGEE-JRA1-TEC-572489-WMS-guide-v0-2.pdf JDL Attributes Specification • Fabrizio Pacini • https://edms.cern.ch/file/555796/1/EGEE-JRA1-TEC-555796-JDL-Attributes-v0-8.pdf

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