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Scientific Linux Network Installation

Scientific Linux Network Installation. Pete Gronbech: April 2005 RAL. dhcpd.conf. # /etc/dhcpd.conf.ngexample - a DHCP daemon configuration file example # for dhcpd 2.0 # distribute an IP address only if the nodes is known deny unknown-clients;

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Scientific Linux Network Installation

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  1. Scientific LinuxNetwork Installation Pete Gronbech: April 2005 RAL

  2. dhcpd.conf # /etc/dhcpd.conf.ngexample - a DHCP daemon configuration file example # for dhcpd 2.0 # distribute an IP address only if the nodes is known deny unknown-clients; # the server will not reply to the unknown clients; in this way # it is possible to have a second DHCP server not authoritative; option domain-name "physics.ox.ac.uk"; # These 3 lines are needed for the installation via PXE option dhcp-class-identifier "PXEClient"; option vendor-encapsulated-options 01:04:00:00:00:00:ff; filename "pxelinux.0"; subnet 163.1.5.0 netmask 255.255.255.0 { option routers 163.1.5.254; option domain-name-servers 163.1.2.1; host t2slwn01 { hardware ethernet 00:30:48:72:F3:61; fixed-address 163.1.5.236; next-server 163.1.5.240; }

  3. /tftpboot/pxelinux.cfg [root@t2lcfg pxelinux.cfg]# ls –la /tftpboot/pxelinux.cfg lrwxrwxrwx 1 root root 31 Feb 15 12:47 A30105EC -> hosts/t2slwn01.physics.ox.ac.uk lrwxrwxrwx 1 root root 11 Dec 8 17:09 A30105ECold -> sl-kick.cfg lrwxrwxrwx 1 root root 31 Feb 15 12:47 A30105ED -> hosts/t2slwn02.physics.ox.ac.uk lrwxrwxrwx 1 root root 11 Dec 10 14:41 A30105EDold -> sl-kick.cfg lrwxrwxrwx 1 root root 31 Feb 15 13:43 A30105EE -> hosts/t2slwn03.physics.ox.ac.uk -rwxr-xr-x 1 root root 414 Feb 15 12:45 ack.cgi -rw-r--r-- 1 apache apache 631 Jul 21 2004 boot-hd.cfg -rwxr-xr-x 1 root root 1140 Feb 15 12:47 create-hash-links.pl lrwxrwxrwx 1 apache apache 11 May 7 2004 default -> boot-hd.cfg drwxr-xr-x 2 apache apache 4096 Feb 21 15:59 hosts -rw-r--r-- 1 apache apache 194 Oct 24 2003 lcfg-install-62.cfg -rw-r--r-- 1 apache apache 238 May 17 2004 lcfg-install-73-2.4.20.cfg -rw-r--r-- 1 apache apache 218 May 13 2004 lcfg-install-73.cfg -rw-r--r-- 1 apache apache 209 Oct 24 2003 lcfg-install-nointeract-62.cfg -rw-r--r-- 1 apache apache 253 May 17 2004 lcfg-install-nointeract-73-2.4.20.cfg -rw-r--r-- 1 apache apache 233 May 7 2004 lcfg-install-nointeract-73.cfg -rw-r--r-- 1 root root 277 May 13 2004 lcfg-install-nointeract-bigkernel-73.cfg -rw-r--r-- 1 root root 279 May 13 2004 lcfg-install-nointeract-custom-73.cfg -rwxr-xr-x 1 root root 182 Feb 15 12:45 Makefile drwxr-xr-x 2 root root 4096 Feb 15 12:52 oldlinks -rw-r--r-- 1 root root 758 Dec 9 17:00 sl-kick.cfg -rwxr-xr-x 1 root root 1063 Feb 15 12:45 swing

  4. boot_hd.cfg [root@t2lcfg pxelinux.cfg]# cat boot-hd.cfg default local # This is the default pxelinux cfg file # It by default drops onto the harddisk but otherwise # various rescure and diagnostic utilities can be used. default local prompt 1 # timeout after 6 seconds. (1/10s of seconds) timeout 60 # Pop up a small menu, this should be changed to correspond to # the options below. display messages/boot-hd.msg label local localboot 0 label memtest+ kernel memdisk append initrd=diagnostics/memtestp-1.15.img label cpuburn kernel memdisk append initrd=diagnostics/cpuburn-1.00.img label nuke kernel memdisk append initrd=diagnostics/book-and-nuke.img

  5. sl-kick.cfg [root@t2lcfg pxelinux.cfg]# cat sl-kick.cfg # This is the default pxelinux cfg file # It by default drops onto the harddisk but otherwise # various rescure and diagnostic utilities can be used. default kickstart prompt 1 # timeout after 6 seconds. (1/10s of seconds) timeout 60 # Pop up a small menu, this should be changed to correspond to # the options below. #display messages/boot-hd.msg label kickstart kernel SL/vmlinuz append initrd=SL/initrd.img keymap=uk devfs=nomount ramdisk_size=16384 ksdevice=link ks=nfs:163.1.5.240:/opt/local/linux/SL303/ks/

  6. hosts subdir link script [root@t2lcfg pxelinux.cfg]# cat Makefile # Make file to update all the hash to hostname links. # This should be run after the the dhcpd file is updated # or the DNS is changed. all: /usr/local/sbin/create-hash-links.pl [root@t2lcfg pxelinux.cfg]# cat /usr/local/sbin/create-hash-links.pl #!/usr/bin/perl -w use strict ; use Socket ; my $dhcpd = " /etc/dhcpd.conf" ; my $tftp = "/tftpboot/pxelinux.cfg" ; my @ips ; open (DHCP,"<$dhcpd") or die "Could not open $dhcpd: $!\n" ; print "Collecting a list of ip address from $dhcpd\n" ; while ( <DHCP> ) { if ( /\s*[^#]\s*fixed-address\s+(\S+)\s*;/ ) { my $fixed = $1 ; # Check if it is a host name and if so we must convert it to # ip address. if ( $fixed =~ m/^.*ox\.ac\.uk$/ ) { print "Converting hostname $fixed to ip address: " ; $fixed = inet_ntoa(inet_aton($fixed) ) or die "fixed= $fixed\n" ; print "$fixed\n" ; } push(@ips,$fixed) ; } } # Now set up the symlinks IF they are not already there. foreach my $ip ( @ips ) { my $hexip = sprintf("%02X%02X%02X%02X",split('\.',$ip)) ; my $hostname = gethostbyaddr(inet_aton($ip), AF_INET) or die "No reverse look up for $ip\n" ; # Create a symlink from the hostname to default config. symlink('../boot-hd.cfg',$tftp.'/hosts/'.$hostname) unless ( -l $tftp.'/hosts/'.$hostname ) ; symlink('hosts/'.$hostname,$tftp.'/'.$hexip) ; } close (DHCP) ;

  7. kickstart directory [root@t2lcfg pxelinux.cfg]# cd /opt/local/linux/SL303/ [root@t2lcfg SL303]# ls -la total 20 drwxr-xr-x 5 root root 4096 Dec 9 17:02 . drwxr-xr-x 5 root root 4096 Nov 26 16:14 .. drwxr-xr-x 3 root root 4096 Oct 1 00:14 images drwxr-xr-x 2 root root 4096 Feb 15 15:02 ks drwxr-xr-x 5 root root 4096 Oct 1 00:14 SL [root@t2lcfg SL303]# cd ks [root@t2lcfg ks]# ls -la total 16 drwxr-xr-x 2 root root 4096 Feb 15 15:02 . drwxr-xr-x 5 root root 4096 Dec 9 17:02 .. lrwxrwxrwx 1 root root 15 Dec 9 12:10 163.1.5.236-kickstart -> anaconda-ks.cfg lrwxrwxrwx 1 root root 15 Dec 10 14:40 163.1.5.237-kickstart -> anaconda-ks.cfg lrwxrwxrwx 1 root root 15 Dec 10 14:40 163.1.5.238-kickstart -> anaconda-ks.cfg lrwxrwxrwx 1 root root 14 Feb 14 16:40 163.1.5.93-kickstart -> SL-Clar-ks.cfg -rw-r--r-- 1 root root 1551 Feb 15 15:01 anaconda-ks.cfg -rw-r--r-- 1 root root 1567 Feb 15 14:10 SL-Clar-ks.cfg

  8. kickstart file 1 [root@t2lcfg ks]# cat anaconda-ks.cfg # Kickstart file automatically generated by anaconda. #network --device eth1 --bootproto dhcp reboot install lang en_US.UTF-8 langsupport --default en_US.UTF-8 en_US.UTF-8 keyboard uk mouse genericwheelps/2 --device psaux xconfig --card "ATI Mach64" --videoram 8192 --hsync 31.5-67 --vsync 50-75 --resolution 1280x1024 --depth 24 --startxonboot --defaultdesktop gnome network --bootproto dhcp nfs --server 163.1.5.240 --dir /opt/local/linux/SL303/ rootpw --iscrypted encryptedpasswdhere firewall --disabled authconfig --enableshadow --enablemd5 timezone Europe/London bootloader --location=mbr

  9. Kickstart file 2 # The following is the partition information you requested # Note that any partitions you deleted are not expressed # here so unless you clear all partitions first, this is # not guaranteed to work zerombr yes clearpart --all part / --fstype "ext3" --size=6000 part /usr --fstype "ext3" --size=6000 part swap --size=2000 part /home --fstype "ext3" --size=100 --grow %packages @ office @ engineering-and-scientific @ editors @ xemacs @ base-x @ graphics @ misc-sl @ text-internet @ kde-desktop @ gnome-desktop @ dialup @ yum @ openafs-client @ authoring-and-publishing @ printing @ sound-and-video @ graphical-internet kernel kernel-module-openafs-2.4.21-20.ELsmp kernel-smp pine grub gv %post # Change link on server to boot from hard disk wget -q t2lcfg.physics.ox.ac.uk/cgi-bin/ack.cgi more later….

  10. ack.cgi [root@t2lcfg ks]# more /var/www/cgi-bin/ack.cgi #!/usr/bin/perl use Socket ; # Configuration file to boot from HD $boothd = "../boot-hd.cfg"; print "Content-type: text/plain\n\n"; $point_address = $ENV{'REMOTE_ADDR'}; $hostname = gethostbyaddr(inet_aton($point_address), AF_INET) ; system ("cd /tftpboot/pxelinux.cfg/hosts ; ln -fs $boothd /tftpboot/pxelinux.cfg/hosts/$hostname"); print "$hostname is now configured to boot from $boothd\n";

  11. Post Installation • We want to perform updates and local customisations • yum update has to be done after the first reboot so set up a one time /etc/rc.local which calls configuration modules then returns the original rc.local and reboots. • yaim can be installed here and LCG software installed and configured • SL can also be mirrored to speed up installations

  12. Post Installation ### Write motd echo "Kickstart-installed Scientific Linux release 3 (FNAL SL 303) `/bin/date`" > /etc/motd # Create a post install init script to run once # Mount the kickstart directory from the server. mkdir /tmp/kick mount -o nolock,nfsvers=2 t2lcfg.physics.ox.ac.uk:/opt/local/linux/SL303 /tmp/kick mkdir /root/install-scripts cp /tmp/kick/modules/* /root/install-scripts umount /tmp/kick rmdir /tmp/kick

  13. Post Installation cp /etc/rc.d/rc.local /etc/rc.d/rc.local.orig # Create a script to run at first reboot. cat <<EOFrc>/etc/rc.d/rc.local #!/bin/sh # One time script to run in two minutes /usr/bin/at "now + 1 minutes" <<EOFat >& /dev/null MODULES="slyum yum-4-lcg java yaim ntpd local-admins root-admins nokudzu " # MODULES="slyum yaim yum-4-lcg lcg-install-wn lcg-setup-wn" # MODULES="denyAll syslog slyum network180 yumit ntpd sshd-ral root-admins" # MODULES="\\\$MODULES sendmail heartbeat local-admins gmond-lcg-others" # MODULES="\\\$MODULES nrpe yaim yum-4-lcg lcg-install-bdii lcg-setup-bdii" for M in \\\$MODULES do /bin/sh -x /root/install-scripts/\\\$M.sh >& /root/install-scripts/\\\$M.log done mv /etc/rc.d/rc.local /etc/rc.d/rc.local.onetime mv /etc/rc.d/rc.local.orig /etc/rc.d/rc.local /sbin/shutdown -r now EOFat touch /var/lock/subsys/local EOFrc

  14. Configuration Modules • slyum.sh #!/bin/sh # yumsl consider yum for SL and update it. cd /etc rm -f yum.conf wget http://t2lcfg.physics.ox.ac.uk/yum/SL/yum.conf /sbin/chkconfig yum off yum -d 1 -y update echo "Oxford PP Scientific Linux 3 standard yum update installed `date`" >> /etc/motd

  15. Configuration Modules • yum-4-lcg.sh #!/bin/sh # Set up the yum repostories for LCG. cat <<EOF>>/etc/yum.conf [oxfordserver] name=Oxford java baseurl=http://t2lcfg.physics.ox.ac.uk/yum/java/ [sl-lcg] name=LCG packages baseurl=http://t2lcfg.physics.ox.ac.uk/yum/lcg/2_4_0/sl3/ [sl-lcg-ca] name=LCG CA packages baseurl=http://t2lcfg.physics.ox.ac.uk/yum/lcg/ca/ EOF

  16. Configuration Modules • java.sh #!/bin/sh yum -y -d 0 -t install j2sdk

  17. Configuration Modules • root-admins.sh #!/bin/sh # We want to allow admins to login mkdir -p /root/.ssh chmod go-rwx,u+rwx /root/.ssh cat <<EOF>/root/.ssh/authorized_keys ssh-dss //gAAAIB8jRBMgcTjU………………………………………qDjt5rmnGLKcSjLwNXCDqSNbKTqOAEWJO2SVp4r7emo3QGBiiiSL9AuBnIscNbLI0oitAFZlFs0fmZSlYu1AiJk/f2MShNA7PTNlbqLUeF4BkUTpO/GFjiTe/FEIlF3IaArjYGfhrBCS14uhhULtcyrHt3KX2qwMw== gronbech@pplx3 EOF

  18. lcg installation • lcg-install-wn #!/bin/sh # Install the packages for a UI node. # We should just install the lcg-WN package # I just install the packages that it requires. yum -t -d 0 -y install lcg-WN-torque yum -t -d 0 -y install lcg-CA

  19. lcg installation • lcg-setup-wn.sh #!/bin/sh # Do the buisness. /opt/lcg/yaim/scripts/configure_WN_torque /root/yaim-conf/site-info.def

  20. GOC Wiki • http://goc.grid.sinica.edu.tw/gocwiki/AdministrationFaq • Using yum to install LCG • Mirror LCG Packages • Preserving host keys when using Kickstart

  21. Credits • This installation method is heavily based on work carried out at RAL by Chris Brew and Steve Traylen.

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