Friday, January 7, 2011

Setup Kickstart Server in Linux

Red Hat Linux operating system installations can be done via a network connection using a Kickstart server. It is frequently much faster than using CDs and the process can be automated.
Example Kickstart 
 Get the kickstart cfg from http server and start the install
   boot: linux ks=

 Get the kickstart cfg from nfs server and start the install
   boot: linux ks=nfs:server:/path/to/kickstart/file

 Serving the Kickstart file from nfs server through dhcp /etc/dhcpd.conf
   filename "/export/rhinstall/kickstart/ks.cfg"


01. Install and configure the DHCPD server

02. Install tftp server and enable TFTP service
a. yum install tftp-server
    b. Enable TFTP server. 
       vi /etc/xinetd.d/tftp and change disable to 'no'
    c. service xinetd restart
03. Install syslinux if not already installed
a. yum install syslinux
04. Copy needed files from syslinux to the tftpboot directory
cp /usr/lib/syslinux/pxelinux.0 /tftpboot
    cp /usr/lib/syslinux/menu.c32 /tftpboot
    cp /usr/lib/syslinux/memdisk /tftpboot
    cp /usr/lib/syslinux/mboot.c32 /tftpboot
    cp /usr/lib/syslinux/chain.c32 /tftpboot
04. Create the directory for your PXE menus
mkdir /tftpboot/pxelinux.cfg
05. For each "Release" and "ARCH" Copy vmlinuz and initrd.img from /images/pxeboot/ directory on "disc 1" of that $Release/$ARCH to /tftpboot/images/RHEL/$ARCH/$RELEASE
mkdir -p /tftpboot/images/RHEL/i386/4.3
    mkdir -p /tftpboot/images/RHEL/i386/5.5
    mkdir -p /tftpboot/images/RHEL/x86_64/4.3
    mkdir -p /tftpboot/images/RHEL/x86_64/5.5
For RHEL 5.5 x86_64, do the following
mount /dev/cdrom /cdrom
    cd /cdrom/images/pxeboot
    cp vmlinuz initrd.img /tftpboot/images/RHEL/x86_64/5.5
Do the above for all releases and ARCH you want to kickstart from this server.
06. Add this to your existing or new /etc/dhcpd.conf.
Note: is the IP address of your PXE server
allow booting;
    allow bootp;
    option option-128 code 128 = string;
    option option-129 code 129 = text;
    filename "/pxelinux.0";
07. Restart DHCP service
# service dhcpd restart
08. Create Simple or Multilevel PIXIE menu. Create a file called "default" in /tftpboot/pxelinux.cfg directory. A Sample file named "isolinux.cfg" is found on the boot installation media in "isolinux" directory. Copy this file as default and edit this file as per requirement. A sample default file is given bellow.
default menu.c32
prompt 0
timeout 300


LABEL Pmajic
        MENU LABEL Pmajic
        kernel images/pmagic/bzImage
        append noapic initrd=images/pmagic/initrd.gz root=/dev/ram0 init=/linuxrc ramdisk_size=100000

label Dos Bootdisk
        MENU LABEL ^Dos bootdisk
        kernel memdisk
        append initrd=images/622c.img

LABEL RHEL 5 x86 eth0
        MENU LABEL RHEL 5 x86 eth0
        KERNEL images/RHEL/x86/5.5/vmlinuz
        APPEND initrd=images/RHEL/x86_64/5.5/initrd.img ramdisk_size=10000 

LABEL RHEL 5 x86_64  eth0
        MENU LABEL RHEL 5 x86_64  eth0
        KERNEL images/RHEL/x86_64/5.5/vmlinuz
        APPEND initrd=images/RHEL/x86_64/5.5/initrd.img ramdisk_size=10000 
09. Install the kickstart Configurator tool. This tool will be helpful to create the kickstart configuration file.
yum install system-config-kickstart
10. Create the kickstart config file. This file can be created using kickstart Configuration Tool. A Sample file anaconda-ks.cfg based on current installation of a system is placed in /root directory. We can also use this /root/anaconda-ks-cfg as the configuration file. Copy this file to the location specified in the default file. Make sure the directory is NFS exported if you are using NFS for installing the OS.
11. Modify the kickstart configuration file as per requirement. If you are using NFS for installation, Make sure to copy the ISO images of Linux disks to any NFS server and NFS export the directory. This server/directory details need to be specified in the jumpstart configuration file.
12. After creating the KS configuration files and copying the ISO images, the installation can be started.

Wednesday, January 5, 2011

Key to Staying Happy in 2011... Check it out!!!!

Problems may come along in life, but take it as a 'ROYAL CHALLENGE'

Otherwise people will call u an 'OLD MONK'

And stick a 'BLACK LABEL' on you.

But you mustn't give up, but keep up the fight like 'NAPOLEAN',

Live like a 'BAGPIPER',

Strut around like 'JOHNNY WALKER',

Work till '8 PM',


.....And do not forget the cute little 'BLACK DOG'

Then your life will surely be 'IMPERIAL BLUE'

And if you do the above, there will be good value for your 'SIGNATURE' .....

! ! ! Cheers ! ! !