Fwd: [Ubuntu Wiki] Update of "Edubuntu/specs/specs/lucid/ltsp-gui-install" by jonathan

[David Groos]

What's the relationship of an install DVD as is being talked about and
having an image of a 'golden server' and burning the image onto a machine?
It would be really cool if some localapps were already set up along with
iTALC and Sabayon and maybe even CmapTools, squid/squidguard and LDAP!
Could there be some kind of a hybrid--having an install DVD which burns on a
'golden server' along with some install steps which allow for a certain
range of customization?  These are just some thoughts from a person who
donated 100+ hours of his summer (with other people's help!) to create a
working thin client server.

David

On Wed, Sep 23, 2009 at 10:31 PM, Alkis Georgopoulos <alkisg at gmail.com>wrote:

> Στις 23-09-2009, ημέρα Τετ, και ώρα 16:44 -0400, ο/η Jordan Mantha
> έγραψε:
> > <snip> I think this would be awesome for the 10.04 LTS release of
> > Edubuntu to have a GUI installer for LTSP so that we can remove that
> > from the text-based installer (which require a lot of DVD space) and
> > is more convenient for the "average user".
>
> All the following thoughts are based on the idea that duplicate files do
> not take extra space on the DVD. If that assumption is wrong, please
> ignore the mail. :-)
>
> WHAT
> ----
> It would be better if the LTSP chroot files were on the DVD, because
> ltsp-build-client downloads a lot of stuff from the internet and takes
> ages even on DSL lines.
>
> It would be even better if teachers were able to try out LTSP from the
> live DVD -slow as it may be- to see if it works for their hardware.
>
>
> HOW (SIZE)
> ----------
> AFAIK, casper uses squashfs, and squashfs has a switch that searches for
> duplicate files and keeps only one physical instance of them.
> So in the case where server architecture == chroot architecture, the
> whole /opt/ltsp/<arch> will only cost a few MB to have on the DVD.
>
> Of course we can't have /opt/ltsp/IMAGES on the DVD. But the chroot
> image can be regenerated in a few minutes with ltsp-update-image.
>
>
> HOW (LIVE)
> ----------
> Assuming that
>  * we don't have /opt/ltsp/images on the DVD, and
>  * the teacher doesn't yet have the proposed network setup for LTSP, as
> he wants to try it out first before buying switches etc,
>
> a "try-out-ltsp" script could be made that:
>  * starts dnsmasq-base (which is in main) in proxydhcp mode so that
> clients can be booted even if the server has 1 NIC and a DHCP server
> already exists on the local network,
>  * calls ltsp-update-sshkeys and ltsp-update-image to generate the
> chroot image. Of course that happens in a tmpfs; but for most modern
> servers the 200Mb RAM that are needed present no problem.
>
>
> It's easy to do the above things with a script - I can have such a
> script ready in a few days.
> I don't know how that script could be included to the DVD building
> process, and removed upon hard disk installation, though.
> Also, if the user doesn't want to install LTSP, ltsp-server should be
> uninstalled and the chroot deleted from the hard disk installation.
>
>
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