http://www.stanford.edu/~alfw/PXE-Kickstart/PXE-Kickstart-8.html
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Two components loaded onto a client are the Linux Kernel and the
initial RAM
disk. For Red Hat 6.2 I got them out of the bootnet.img
file.
Here is how you get to them:
bash# mkdir /mnt/linux /mnt/linux1
bash# mount /tmp/bootnet.img /mnt/linux -o loop
bash# cp /mnt/linux/initrd.img /tftp/initrd-6.2.img
bash# cp /mnt/linux/vmlinuz /tftp/vmlinuz-6.2
For Red Hat 7.1 and higher the files are already in a special
directory in
the distribution:
bash# cp i386/images/pxeboot/initrd.img /tftp/initrd-7.2.img
bash# cp i386/images/pxeboot/vmlinuz /tftp/vmlinuz-7.2
You can of course use the same method as for Red Hat 6.2 if you want
to.
Starting with Red Hat 9 you have to use the images in the
pxeboot directory because the bootdisk.img
does not
contain any network drivers!
The installer "anaconda" from Red Hat Linux 6.2 cannot install over
"eth1"!
If you have a motherboard NIC which cannot do PXE but your machine has
a
second NIC which can do PXE (which was the case for my clients), you
need to
modify the "anaconda" source code.
"anaconda" in Red Hat 7 and later has a new parameter ksdevice
for
exactly this purpose (see the default.netboot-7.2 example
in
Section Bootloader).
Here is the modification you need to make in file
RedHat6.2/i386/misc/src/anaconda/loader/loader.c:
1584,1585c1583
+ /* Modification by Alf Wachsmann <[email protected]> */
+ if (kickstartNetwork("eth1", &netDev, "dhcp", flags)) {
---
- if (kickstartNetwork("eth0", &netDev, "dhcp", flags)) {
You get the new loader program into your initial RAM
disk with the
following commands:
bash# cd i386/misc/src/anaconda/loader
bash# vi loader.c # make the changes from above
bash# make
bash# strip loader-network
bash# mkdir /mnt/linux /mnt/linux1
bash# cp i386/images/bootnet.img /tmp/bootnet.img
bash# mount /tmp/bootnet.img /mnt/linux -o loop
bash# cp /mnt/linux/initrd.img /tmp/initrd.img.gz
bash# gzip -d /tmp/initrd.img.gz
bash# mount /tmp/initrd.img /mnt/linux1 -o loop
bash# cp i386/misc/src/anaconda/loader/loader-network /mnt/linux1/sbin/loader
bash# umount /mnt/linux1
bash# gzip /tmp/initrd.img
bash# cp /tmp/initrd.img.gz /tftp/initrd.img
This new initial RAM disk will now perform Kickstart over "eth1"
(and only
over "eth1").
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