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LCFG overview and future

This document provides an overview of LCFG (Linux Configuration), a powerful tool designed for the configuration of large-scale and diverse systems. It details the process of setting up both LCFG servers and clients, emphasizing the dynamic and flexible nature of LCFG in managing system configurations. The future of LCFG looks promising, with potential enhancements for better compatibility and monitoring, and new high-level configuration languages on the horizon. Collaboration to support other testbed sites is also encouraged.

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LCFG overview and future

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  1. LCFG overview and future Michael George University of Liverpool mpg@hep.ph.liv.ac.uk

  2. Before I start • For more complete information see http://www.lcfg.org or contact • Alexander Holt lex@fixedpoint.org • Paul Anderson paul@dcs.ed.ac.uk

  3. Overview of LCFG • Configuration of large scale, diverse, dynamically changing systems • Config of entire site held in source files on central server • “Profile” constructed for each machine • Utilise inheritance • Based on RPM lists, key-value pairs

  4. Overview of LCFG • “Profiles” published on web server • Clients can be automatically notified of changes • Each client runs • The updaterpms program • Component scripts (similar to /etc/init.d)

  5. Installation of an LCFG server • Custom install Red Hat 6.2 including • NFS, web server • Install LCFG RPMs and directory tree • Configure web server • Populate RPM repositories • Make root filesystem available over NFS • Configure DHCP server • Create client profiles

  6. Installation of an LCFG client • Boot from floppy • DHCP server specifies additional options • “install server” NFS-exports linux root filesystem to node for installation • “profile server” makes profiles available via http • “RPM server” NFS-exports RPM directories

  7. Current Datagrid LCFG version • DHCP server must also be the “install server” • Current documentation assumes all “servers” are one machine • http://datagrid.in2p3.fr/distribution/datagrid/wp4/installation/doc

  8. Why use LCFG at testbeds? • Installation of first machine clearly more difficult than using kickstart. But… • Subsequent machines should be straightfoward (see Steve Traylen’s talk tomorrow) • Dynamic nature of GRID development could be handled well, ensuring inter-testbed compatability

  9. LCFG future • Better configuration of Globus, etc. • Enhancements to low level machinery (monitoring config state, scheduling…) • New high level config language (including proper abstractions) • Red Hat 6.2, 7.1 and 7.2 • Other unixes

  10. LCFG future • Once installation complete at Liverpool… • I am willing to help other testbed sites

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