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LCG2 Administrators Course Oxford University, 19 th- 21 st July 2004 Node Installation

Learn how to install and configure nodes in the LCG2 Admin Course at Oxford University on 19th-21st July 2004. Topics include node installation, LCFG hardware module, NIC and SCSI configurations, extending profiles, manual configuration, PBS and certificates.

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LCG2 Administrators Course Oxford University, 19 th- 21 st July 2004 Node Installation

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  1. LCG2 Administrators CourseOxford University, 19th- 21st July 2004 Node Installation Steve Traylens.traylen@rl.ac.ukRutherford Appleton Lab LCG2 Admin Course – Install Nodes

  2. Node Installation - Overview • Booting Machines. • Watch them fail. • Explain LCFG hardware module. • NIC • SCSI • Extending Profiles. • Adding extra RPMS to the BASE-rpm. • Now install perfectly. • Manual Configuration of Nodes. • PBS. • Certificates. • WN information. • Introduce FileCopy hack for WNs. • Software Directory. LCG2 Admin Course – Install Nodes

  3. Watch Nodes Fail To Install • ramdisk_size • The module for the SCSI driver has not been loaded at install time. • The module for the network driver has not been loaded at first reboot. • There are two GridPP FAQS to help resolve this situation. Look at the /etc/modules.conf on the LCFGng server for the correct modules. Both involve adding extra lines to the site-cfg.h file. LCG2 Admin Course – Install Nodes

  4. Watch Nodes Fail to Install(2). • The /etc/modules.conf file is still wrong and is missing one line still. • We have come to the limit of what the standard template provided by LCG can provide and we must exactly specify the /etc/modules.conf we want. • With LCFG you basically loose all hardware auto detection. LCG2 Admin Course – Install Nodes

  5. LCFG Hardware Module • The hardware module creates the /etc/module.conf. • We append something to a nodes profile to completely ignore what has gone before and define a completely new /etc/modprobe.conf • http://www.gridpp.ac.uk/tb-support/faqs/modconf.html LCG2 Admin Course – Install Nodes

  6. Network Driver Not In the Kernel. • The final problem configuring these nodes is that the network driver is not present in the kernel. • An rpm of this driver is available. • To add the extra RPM cp the rpm to /opt/local/linux/7.3/RPMS/externalcd /opt/local/linux/7.3/RPMS/external && make • Append BASE-rpm with the RPM you want to add. LCG2 Admin Course – Install Nodes

  7. Nodes Should Now Install • Hopefully all nodes should now install. • All software is there and the vast majority of configuration is done. • Continue on to the manual steps of configuration. • CE, SE – Host Certificates • CE – PBS • CE – Information from WN. • CE – edg-pbs-shostequiv.conf and sshd_config • Leave the WN as we will implement a botch to avoid the manual steps for this. • WNs are the nodes we want to be 100% automatic in their installation. LCG2 Admin Course – Install Nodes

  8. The FileCopy Module • The filecopy module can be used when all else fails. • It allows you to specify in your LCFG profile a file to copy onto your systems. • On the WN we want to copy /etc/ssh/ssh_config into place. To the WN we add. LCG2 Admin Course – Install Nodes

  9. VO Software Directory • This is explained in the LCG FAQ. • Are aim is to have an area /experiment/ automounted from the SE to all the WNs. LCG2 Admin Course – Install Nodes

  10. Site is Up and Running • At this point everything is hopefully installed and working. • I can guarantee that something will be wrong with every site. • Now we move on to the testing. LCG2 Admin Course – Install Nodes

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