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kernelOfTruth
Watchman
Watchman


Joined: 20 Dec 2005
Posts: 5729
Location: Vienna, Austria; Germany; hello world :)

PostPosted: Sat Nov 04, 2006 9:27 pm    Post subject: gentoo-based liveCD HOWTO Reply with quote

Hi,

there are so much of them but it's difficult for one to find the suitable: liveCD building HOWTOs

this thread / howto should make it easy for you to build up a liveCD (not usbstick :wink: )

but enough of talking / writing now on to the steps:

03/28/2007

so here the short version :wink: (I have little time):

1)
this is the directory structure of livecd build environment:

Quote:
drwxr-xr-x 2 root root 2 2. Sep 2006 backup
drwxr-xr-x 3 root root 4 2. Sep 2006 boot
-rwxr-xr-x 1 root root 254 25. Mär 18:20 buildcd
-rwxr-xr-x 1 root root 642 25. Mär 13:57 leave
-rw-r--r-- 1 root root 607 15. Jan 15:51 leave~
drwxr-xr-x 2 1001 users 2 15. Jan 15:33 livecd-x86
-rwxr-xr-x 1 root root 61 19. Mär 09:59 make_image.squashfs
-rwxr-xr-x 1 root root 1277 25. Mär 13:57 prepare
-rw-r--r-- 1 root root 1212 15. Jan 15:51 prepare~
drwxr-xr-x 5 root root 14 26. Mär 09:42 small-isolinux
drwxr-xr-x 21 root root 25 25. Mär 12:56 source
drwxr-xr-x 2 root root 2 25. Mär 11:23 usr-include
drwxr-xr-x 2 root root 2 25. Mär 11:23 usr-lib-gcc
drwxr-xr-x 2 root root 243 19. Mär 08:39 usr-lib-gconv
drwxr-xr-x 2 root root 2 15. Jan 15:43 usr-lib-perl5
drwxr-xr-x 6 root root 6 2. Sep 2006 usr-lib-portage
drwxr-xr-x 6 root root 6 25. Mär 14:30 usr-local-portage
drwxr-xr-x 2 root root 2 2. Sep 2006 usr-portage
drwxr-xr-x 3 root root 3 3. Sep 2006 usr-share-binutils_data
drwxr-xr-x 446 root root 446 25. Mär 21:48 usr-share-doc
drwxr-xr-x 2 root root 2 25. Mär 11:23 usr-share-gcc_data
drwxr-xr-x 3 root root 3 3. Sep 2006 usr-share-gtk-doc
drwxr-xr-x 4 root root 5 19. Mär 08:39 usr-share-i18n
drwxr-xr-x 2 root root 127 25. Mär 18:00 usr-share-info
drwxr-xr-x 3 root root 7 4. Mär 10:24 usr-share-libtool
drwxr-xr-x 153 root root 154 25. Mär 15:01 usr-share-locale
drwxr-xr-x 29 root root 29 25. Mär 17:08 usr-share-man
drwxr-xr-x 21 root root 70 25. Mär 17:54 usr-share-zoneinfo
drwxr-xr-x 11 root root 14 25. Mär 21:51 usr-src
drwxr-xr-x 2 root root 2 2. Sep 2006 usr-X11R6-man


the folders with "-" in their name are "outsourced" of the livecd-environment, called "source"

folder "small-linux" is the "visible" content of the livecd which can be seen after having loaded it into your drive
(containing image.squashfs, boot kernel, isolinux, etc etc)

2) first extract stage3 / stage ... tarball into source

3) later move the named folders out of the livecd environment to save space

the folders "boot" & "backup" aren't necessary they are optional for backup purposes

4) create 4 scripts:

prepare.sh (for mounting / readying the livecd environment for work):

Code:
#!/bin/bash

mount -t proc                   none  source/proc

mount -o bind                   /sys  source/sys
mount -o bind                   /dev  source/dev
mount -o bind               usr-src/  source/usr/src

mount -o bind       usr-lib-portage/  source/usr/lib/portage
mount -o bind      usr-share-libtool/ source/usr/share/libtool
#mount -o bind      usr-share-gcc_data/ source/usr/share/gcc-data
mount -o bind     usr-share-binutils_data/ source/usr/share/binutils-data
mount -o bind     usr-share-i18n/     source/usr/share/i18n
#mount -o bind    usr-lib-perl5/      source/usr/lib/perl5
#mount -o bind          usr-lib-gcc/  source/usr/lib/gcc
mount -o bind   usr-lib-gconv/        source/usr/lib/gconv
#mount -o bind           usr-include/  source/usr/include
mount -o bind        usr-share-info/  source/usr/share/info
mount -o bind           usr-share-locale/ source/usr/share/locale
mount -o bind         usr-share-man/  source/usr/share/man
mount -o bind         usr-share-doc/  source/usr/share/doc
mount -o bind     usr-share-gtk-doc/  source/usr/share/gtk-doc
mount -o bind     usr-share-zoneinfo/ source/usr/share/zoneinfo
mount -o bind         usr-X11R6-man/  source/usr/X11R6/man

mount -o bind           /home/        source/home
mount -o bind   usr-local-portage     source/usr/local/portage



leave.sh (for unmounting / leaving the livecd environment):

Code:
#!/bin/bash
###cd ${LIVEDIR}
umount source/proc
umount source/sys
umount source/dev
umount source/usr/src

umount source/usr/lib/portage
#umount source/usr/lib/perl5
#umount source/usr/lib/gcc
umount source/usr/lib/gconv
#umount source/usr/include
umount source/usr/share/binutils-data
umount source/usr/share/libtool
#umount source/usr/share/gcc-data
umount source/usr/share/info
umount source/usr/share/locale
umount source/usr/share/man
umount source/usr/share/i18n
umount source/usr/share/doc
umount source/usr/share/gtk-doc
umount source/usr/share/zoneinfo
umount source/usr/X11R6/man

umount source/home
umount source/usr/local/portage


/home folder is optional, I've located distfiles directory in /home via symbolic link to /usr/portage, so you can leave it out

make_image.squashfs (for creating your livecd "snapshot") [tmpfs optional]:

Code:
#!/bin/sh
mksquashfs source/ /var/tmp/paludis/image.squashfs


I'm mounting a tmpfs to /var/tmp/paludis, so it's faster (optional)


buildcd.sh (for unmounting / leaving the livecd environment):

Code:
#!/bin/sh

mkisofs -pad -l -r -J -v -V "custom-livecd" \
-no-emul-boot -boot-load-size 4 \
-boot-info-table -b isolinux/isolinux.bin \
-c isolinux/boot.cat -hide-rr-moved \
-o /var/tmp/paludis/custom-livecd.iso /home/livecd-x86/small-isolinux


the final livecd script which incorporates the squashfs-image with the "visible" content of your livecd

the name between the 2 "" is your livecd name

the name custom-livecd.iso the name of the iso

adapt /home/livecd-x86/small-isolinux to your directory structure

5) notice:

for mksquashfs to work, you need to install the package "squashfs-tools"

This thread is work in progress and will approximately take some weeks, so please don't rush me, as I have little time ...

I take the freedom to make 3 posts after another that I can extend this howto when needed ...
_________________
https://github.com/kernelOfTruth/ZFS-for-SystemRescueCD/tree/ZFS-for-SysRescCD-4.3.0-r2
2.6.37.2_plus_v1: BFS, CFS,THP,compaction, zcache or TOI
Hardcore Linux user since 2004 :D


Last edited by kernelOfTruth on Wed Mar 28, 2007 6:04 pm; edited 5 times in total
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kernelOfTruth
Watchman
Watchman


Joined: 20 Dec 2005
Posts: 5729
Location: Vienna, Austria; Germany; hello world :)

PostPosted: Sat Nov 04, 2006 9:27 pm    Post subject: Reply with quote

6) content of "small-isolinux" (the "visible" part of your livecd):

fill this directory with additional files you need, e.g. mp3s, htm files, pdfs, ...

Quote:
-rw-r--r-- 1 root root 7351708 25. Mär 15:17 2.6.20-livecd-x86-r10.patch
-rw-r--r-- 1 root root 43301 4. Mär 13:01 atl1-2.0.7-linux-2.6.20-standalone.tar.gz
-rw-r--r-- 1 root root 50342 4. Mär 11:58 config-livecd-x86
-rw-r--r-- 1 root root 21776 14. Sep 2006 Getting_Online.txt
drwxr-xr-x 2 root root 3 15. Jan 15:47 handbook-x86_files
-rw-r--r-- 1 root root 446432 15. Jan 15:47 handbook-x86.html
drwxr-xr-x 2 root root 19 4. Mär 11:57 isolinux
-rw-r--r-- 1 root root 0 14. Sep 2006 livecd
-rw-r--r-- 1 root root 6222 14. Sep 2006 README.txt
-rw-r--r-- 1 root root 266024 25. Mär 11:49 reiserfsprogs-3.6.20.tbz2
-rw-r--r-- 1 root root 1915 25. Mär 11:40 release.txt
drwxr-xr-x 2 root root 4 25. Mär 23:34 xorg


the only necessary directory is "isolinux"

(probably also the file called "livecd")

7) content of directory "isolinux", residing in "small-isolinux"
for this to work you need to install the package "syslinux" (-> contains isolinux)

adapted from gentoo- minimal livecd:

Quote:
-rw-r--r-- 1 root root 2048 14. Sep 2006 boot.cat
-rw-r--r-- 1 root root 476 25. Mär 19:41 boot.msg
-rw-r--r-- 1 root root 950 14. Sep 2006 F2.msg
-rw-r--r-- 1 root root 1399 14. Sep 2006 F3.msg
-rw-r--r-- 1 root root 1550 14. Sep 2006 F4.msg
-rw-r--r-- 1 root root 1269 14. Sep 2006 F5.msg
-rw-r--r-- 1 root root 1300 14. Sep 2006 F6.msg
-rw-r--r-- 1 root root 1461 14. Sep 2006 F7.msg
-rw-r--r-- 1 root root 4160424 25. Mär 22:30 gentoo
-rw-r--r-- 1 root root 3879789 25. Mär 22:30 gentoo.igz
-rw-r--r-- 1 root root 10440 25. Mär 22:36 isolinux.bin
-rw-r--r-- 1 root root 1027 4. Mär 11:57 isolinux.cfg
-rw-r--r-- 1 root root 237 4. Mär 11:57 kernels.msg
-rw-r--r-- 1 root root 99256 15. Jan 19:24 memtest86plus

_________________
https://github.com/kernelOfTruth/ZFS-for-SystemRescueCD/tree/ZFS-for-SysRescCD-4.3.0-r2
2.6.37.2_plus_v1: BFS, CFS,THP,compaction, zcache or TOI
Hardcore Linux user since 2004 :D


Last edited by kernelOfTruth on Wed Mar 28, 2007 6:03 pm; edited 1 time in total
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kernelOfTruth
Watchman
Watchman


Joined: 20 Dec 2005
Posts: 5729
Location: Vienna, Austria; Germany; hello world :)

PostPosted: Sat Nov 04, 2006 9:28 pm    Post subject: Reply with quote

8) isolinux.cfg:

Code:
default gentoo-nofb
timeout 150
prompt 1
display boot.msg
F1 kernels.msg
F2 F2.msg
F3 F3.msg
F4 F4.msg
F5 F5.msg
F6 F6.msg
F7 F7.msg

#label gentoo
#  kernel gentoo
#  append root=/dev/ram0 init=/linuxrc  dokeymap looptype=squashfs loop=/image.squashfs  cdroot initrd=gentoo.igz vga=791$

label gentoo-nofb
  kernel gentoo
  append root=/dev/ram0 init=/linuxrc looptype=squashfs loop=/image.squashfs  cdroot initrd=gentoo.igz vga=792

label gentoo-irqpoll
  kernel gentoo
  append "irqpoll" root=/dev/ram0 init=/linuxrc looptype=squashfs loop=/image.squashfs  cdroot initrd=gentoo.igz vga=792

label gentoo-nomsi
  kernel gentoo
  append pci=nomsi root=/dev/ram0 init=/linuxrc looptype=squashfs loop=/image.squashfs  cdroot initrd=gentoo.igz vga=792

label gentoo-nomsiirqpoll
  kernel gentoo
  append "irqpoll" pci=nomsi root=/dev/ram0 init=/linuxrc looptype=squashfs loop=/image.squashfs  cdroot initrd=gentoo.ig$


label memtest86plus
  kernel memtest86plus


change to your needing

for custom kernel copy over kernel from "source" directory in your livecd-environment:

e.g. kernel-genkernel-x86-2.6.20-kot2 -> gentoo
initramfs-genkernel-x86-2.6.20-kot2 -> gentoo.igz

for solving kernel-module dependencies do

Code:
depmod -v `ls /lib/modules`


otherwise it looks in your build environment (= outside)

for more info on this directory, have a look at the files in your gentoo minimal livecd :wink:

9) content of "source" (where the livecd / gentoo system is located at):

Quote:
drwxr-xr-x 2 root root 126 25. Mär 17:54 bin
drwxr-xr-x 2 root root 7 25. Mär 22:30 boot
-rwxr-xr-x 1 root root 159 1. Sep 2006 chroot.sh
-rw-r--r-- 1 root root 50342 4. Mär 12:25 config-livecd
drwxr-xr-x 10 root root 1482 15. Sep 2006 dev
drwxr-xr-x 74 root root 168 25. Mär 22:32 etc
drwxr-xr-x 3 root root 4 25. Mär 14:32 home
drwxr-xr-x 10 root root 154 25. Mär 22:13 lib
drwxr-xr-x 2 root root 3 25. Mär 22:23 media
drwxr-xr-x 5 root root 6 28. Okt 12:14 mnt
drwxr-xr-x 2 root root 2 1. Sep 2006 new
drwxr-xr-x 2 root root 2 1. Sep 2006 newroot
drwxr-xr-x 6 root root 7 25. Mär 15:02 opt
drwxr-xr-x 2 root root 3 14. Feb 2006 proc
drwx------ 3 root root 17 25. Mär 14:33 root
drwxr-xr-x 2 root root 245 25. Mär 22:22 sbin
drwxr-xr-x 2 root root 3 14. Feb 2006 sys
drwxrwxrwt 3 root root 278 25. Mär 22:32 tmp
drwxr-xr-x 13 root root 14 1. Sep 2006 usr
drwxr-xr-x 10 root root 13 10. Okt 21:13 var
-rwxr-xr-x 1 root root 44 1. Sep 2006 world.sh


take care that you've created the directories newroot & new !

without them the livecd doesn't work for me

chroot.sh is for chrooting into the livecd-system (optional):

Code:
#!/bin/sh
#env-update && source /etc/profile
mount --bind /usr/portage usr/portage
chroot . /bin/bash --login
echo "unmounting usr/portage"
umount usr/portage


updating world dependencies (portage-related) [optional]:

Code:
#!/bin/sh
env-update && source /etc/profile




10) other stuff to install on the livecd:

- enable livecd useflag
- install livecd-tools
-

11) kernel-build options for genkernel

- update genkernel-dependencies to newest versions according to versions available in portage
(-> edit ebuild)

Code:
genkernel --no-clean --makeopts=-j7 --no-bootsplash --lvm2 --evms2 --dmraid --unionfs-dev --menuconfig all

(builds faster, without --no-bootsplash you can get a black screen when having a kernel built without vesafb-tng & not enabled)
_________________
https://github.com/kernelOfTruth/ZFS-for-SystemRescueCD/tree/ZFS-for-SysRescCD-4.3.0-r2
2.6.37.2_plus_v1: BFS, CFS,THP,compaction, zcache or TOI
Hardcore Linux user since 2004 :D
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