This document summarizes Kentaro Hatori's presentation on booting directly from openSUSE ISO files using grub2. It provides background on Hatori and his involvement in several Japanese open source and Linux communities. It then discusses Koedo LUG, a local Linux user group in Kawagoe-city, Japan. The main topic is examples of grub2 configuration files for booting many different Linux distributions directly from ISO files, including openSUSE, Ubuntu, Fedora, and more. It notes difficulties booting openSUSE ISO files directly and emphasizes having fun with Linux as most important.

1. Booting directly
openSUSE iso file by
grub2
openSUSE Asia Summit 2015
2015-09-05
Kentaro Hatori

2. 2
Self-Introduction
●
Affiliation
● Information-technology Promotion
Agency, Japan
● Koedo Linux Users' Group (Koedo LUG)
which is one of local Linux community in
Japan
●
OpenStreetMap Foundation Japan
● Open Knowledge Japan
● Code for Japan
●
Activity
● Developing original LiveCD Linux but very
slowly and going away from the point

3. 3
Today's Topic is
Booting directly openSUSE iso
file by grub2

4. Introduction of Koedo LUG
● Since August, 2002
● Koedo is nicname of Kawagoe-city
and means Little Classic Tokyo
● This community aims following-up
each members who are interested in
Linux, ask about unknown term and
contribute by joining events and
seminars
● The rule of managing this community
is every member thinks each other
about shareing so long fun time
through Linux

5. Where is Kawagoe-city?

6. Kawagoe Festival #1

7. Kawagoe Festival #2

8. Koedo LUG Activity
● Mailing List for information exchange
about Linux & open source software
● Off party & study group each month
● BBQ party on river beach each year
● Publishing a original Linux technology
magazine “Linux User”
● Comic Market summer & winter
● Members：over 370（just registration
mailing list）
● Active members：about 20

9. Software Freedom Day
2015-09-19 @Sios Technology inc.

10. BBQ (Beer) Party
on Han-nou river beach

11. 11
Off Party & Study Group
● Very very variety theme from server to
embedded including desktop
● Success story and failures
● Failures are very important; these tell
bad know-how and how to asking
and answering

12. 12
Failures

13. 13
I cannot success to boot
directly openSUSE iso file by
grub2

14. 14
Today's Topic is
Booting directly openSUSE iso
file by grub2

15. 15
Most strong point of Grub2
● Grub2 makes grub.conf automatically
● Configure files are very complex...
● A new function is booting directory a
Linux distro iso file without extracting

16. 16
Booting directly iso file
● You can have so many Linux distro iso
files in one device which is CD/DVD or
USB thumb drive and boot any iso file
directly
● You can make original multi booting
device
● But you must describe each distro
booting process

17. 17
Example for Slax 32bit
menuentry 'Slax 7.0.8 32bit' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile='/slax-7.0.8-i486.iso'
search --no-floppy --file --set=root $isofile
loopback loop ($root)$isofile
linux (loop)/slax/boot/vmlinuz from=$isofile
slax.flags=perch,xmode nopersistent noeject
noprompt noatime ro
initrd (loop)/slax/boot/initrfs.img
}

18. 18
Example for Porteus
menuentry 'Porteus-KDE v3.1' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile='/Porteus-v3.1-i486.iso'
search --no-floppy --file --set=root $isofile
loopback loop ($root)$isofile
linux (loop)/boot/syslinux/vmlinuz from=$isofile
noswap kmap=jp nomagic
initrd (loop)/boot/syslinux/initrd.xz
}

19. 19
Example for Debian
menuentry 'Debian GNU/Linux 7.0.0' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile="/debian-live-7.0.0-i386-lxde-
desktop.iso"
search --no-floppy --file --set=root $isofile
loopback loop ($root)$isofile
linux (loop)/live/vmlinuz boot=live iso-
scan/filename=$isofile noprompt noeject quiet
splash --
initrd (loop)/live/initrd.img
}

20. 20
Example for Ubuntu
menuentry "Ubuntu 14.04" {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile="/ubuntu-14.04-desktop-i386.iso"
loopback loop ($root)$isofile
linux (loop)/casper/vmlinuz boot=casper iso-
scan/filename=$isofile noprompt noeject quiet
splash --
initrd (loop)/casper/initrd.lz
}

21. 21
Example for Knoppix
menuentry "Knoppix 7.2" {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile='/KNOPPIX_V7.2.0CD-2013-06-16-
EN.iso'
search --no-floppy --file --set=root $isofile
loopback loop ($root)$isofile
linux (loop)/boot/isolinux/linux
bootfrom=/dev/sdb1$isofile lang=us apm=power-
off nomce
initrd (loop)/boot/isolinux/minirt.gz
}

22. 22
Example for Fedora
menuentry 'Fedora Live/Desktop 19' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile='/Fedora-Live-Desktop-x86_64-19-1.iso'
set rdfile='/isolinux/initrd0.img'
search --no-floppy --file --set=root $isofile
loopback loop $isofile
linux (loop)/isolinux/vmlinuz0
root=live:CDLABEL=Fedora-Live-Desktop-x86_64-19-1
$isofile rootfstype=auto ro rd.live.image quiet rhgb
rd.luks=0 rd.md=0 rd.dm=0 iso-scan/filename=${isofile}
initrd (loop)$rdfile

23. 23
Example for CentOS
menuentry 'CentOS 6.5 i386 LiveCD' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile='/CentOS-6.5-i386-LiveCD.iso'
set rdfile='/isolinux/initrd0.img'
search --no-floppy --file --set=root $isofile
loopback loop $isofile
linux (loop)/isolinux/vmlinuz0
root=live:CDLABEL=CentOS-6.5-i386-LiveCD $isofile
rootfstype=auto ro rd.live.image quiet rhgb rd.luks=0
rd.md=0 rd.dm=0 iso-scan/filename=${isofile}
initrd (loop)$rdfile

24. 24
Error of CentOS Booting
Kernel panic not syncing: Attempted to kill init!–
Pid: 1, comm: init Not tainted 2.6-32-
431.e16.i686 #1
Call Trac:
[<c085cc75>]? Panic + 0x6e/0x122
[<c045fc71>]? do_exit + 0x741/0x750
[<c045fcbc>]? do_group_exit + 0x39/0xe0
[<c045fd31>]? sys_exit_group + 0x11/0x26
[<c04699bf>]? Sysenter_do_call + 0x12/0x28
ctrm_kms_helper: panic occurred, switching back
to text console

25. 25
Example for TinyCore
menuentry 'CorePlus 6.3' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile="/CorePlus-current.iso"
search --no-floppy --file --set=root $isofile
loopback loop ($root)$isofile
linux (loop)/boot/vmlinuz iso=/mnt/sdb1$isofile
cde quiet waitusb=5 tce=/mnt/cdrom/cde
lang=ja_JP.UTF-8 kmap=qwerty/jp106
initrd (loop)/boot/core.gz
}

26. 26
Example for SystemRescue
menuentry 'System Rescue 4.5.1 ' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile="/systemrescuecd-x86-4.5.1.iso"
loopback loop ($root)$isofile
linux (loop)/isolinux/rescue32 setkmap=jp
isoloop=$isofile dostartx
initrd (loop)/isolinux/initram.igz
}

27. 27
Example for Gparted
menuentry 'Gparted Live 0.21.0-1' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile="/gparted-live-0.21.0-1-i586.iso"
search --no-floppy --file --set=root $isofile
loopback loop ($root)$isofile
linux (loop)/live/vmlinuz boot=live config
union=aufs noswap noprompt ip=frommedia
toram=filesystem.squashfs findiso=$isofile
initrd (loop)/live/initrd.img
}

28. 28
Example for Clonezilla
menuentry "Clonezilla Live 2.3.2-22" {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile="/clonezilla-live-2.3.2-22-i586.iso"
loopback loop $isofile
linux (loop)/live/vmlinuz boot=live live-config noswap
nolocales edd=on nomodeset ocs_live_run="ocs-live-
general" ocs_live_extra_param=""
ocs_live_keymap="" ocs_live_batch="no"
ocs_lang="" ip=frommedia nosplash
toram=filesystem.squashfs findiso=$isofile
initrd (loop)/live/initrd.img
}

29. 29
How to get the information
about describing grub2
● Grub2/ISOBoot/Examples - Community Help Wiki
https://help.ubuntu.com/community/Grub2/ISOBoot/Examples
● Grub2/ISOBoot - Community Help Wiki
https://help.ubuntu.com/community/Grub2/ISOBoot
● Anyway mount and extract iso file and extract
● Making booting USB thumb drive from iso file by
unetboot

30. 30
Mount and extract iso file
$ mkdir /mnt/loop
$ sudo mount -t iso9660,ro openSUSE-13.2-KDE-Live-i686.iso
/mnt/loop
$ cat /mnt/loop/config.isoclient
IMAGE='loop;openSUSE-13.2-livecd-kde.i686;2.8.0'
UNIONFS_CONFIG='/dev/ram1,loop,overlay'
$ cat /mnt/loop/liveboot
initrd-isoboot-suse-13.2.i686-2.1.2.gz

31. 31
Unetboot

32. 32
Example for openSUSE
menuentry 'openSUSE 13.2' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile='/openSUSE-13.2-KDE-Live-i686.iso'
loopback loop ($root)$isofile
linux (loop)/boot/i386/loader/linux
ramdisk_size=512000 ramdisk_blocksize=4096
splash=silent quiet preloadlog=/dev/null showopts
livecd_config=(loop)/config.isoclient
initrd (loop)/boot/i386/loader/initrd
}

33. 33
Error of openSUSEC Booting
error: no such partition.
error: disk 'loop' not found.
error: you need to load the kernel first.

34. 34
Example for openSUSE #2
menuentry 'openSUSE 13.2' {
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
set isofile='/openSUSE-13.2-KDE-Live-i686.iso'
loopback loop ($root)$isofile
linux (loop)/openSUSE-13.2-livecd-kde-
read-only.i686-2.8.0 ramdisk_size=512000
ramdisk_blocksize=4096 splash=silent quiet
preloadlog=/dev/null showopts
livecd_config=(loop)/config.isoclient
fromiso=$isofile

35. 35
Error of openSUSEC Booting
error: no such partition.
error: disk 'loop' not found.

36. 36
Anyway
most important thing is...

37. 37
Have a fun !!