Re: [gentoo-dev] Livecds

[Toby Dickenson <tdickenson@devmail.geminidataloggers.co.uk>]

On Monday 02 December 2002 2:30 am, daveman@bellatlantic.net wrote:

> This sounds interesting, I figure I'll give a stab at how I might begin to
> approach such a thing ;-)
>
> *  Make yourself a loopback filesystem of about 640MB in size and mount.

No need for a loopback filesystem. Just chroot into an ordinary directory.

> *  Mount /var and /tmp and /proc from regular filesystem into your new
>    filesystem and chroot.
>
> *  Do your regular gentoo install. When your done, perhaps clean out the
>    /usr/portage area? Unmount.

Or mount your /usr/portage from the outer filesystem like you describe above 
for /proc. I do the same for /usr/src too, since I dont want kernel sources 
on my livecd

* build isolinux. The origin site has a later version than in portage

* copy the initrd image from the original livecd. (no need to modify it)

* look at the isolinux config file from the original livecd. you might want to 
tweak it

* grep for CDBOOT in the original livecd /etc directory. There are a few 
baselayout files that have been tweaked from the original portage versions. 
In this bugzilla entry I suggested it would be nice to standardise this:
http://bugs.gentoo.org/show_bug.cgi?id=11330

> *  Make an el torito CD.(not entirely sure how to do this part)

My build script uses the command:

mkisofs -x "/rescuedisk/image/usr/share/doc" -x 
"/rescuedisk/image/usr/share/man" -o disk.iso -J -r -nobak -b 
isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 
-boot-info-table /rescuedisk/image

> *  Copy over filesystem image to the CD.
>
> *  I'm thinking you'll probably need a RAMDISK for temporary file storage
> and whatnot.

The original livecd initrd takes care of all that nicely.

> Sounds like it would be a fun project. If someone has already done such a
> document it would be very interesting to see. If not, it might be fun to
> write. ;-)

its on my todo list



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