[Pkg-ltsp-devel] Bug#780591: ltsp-client-builder fails when installing Debian Edu combined server in virtualbox environment

[Wolfgang Schweer]

On Sun, Mar 29, 2015 at 04:07:34PM -0700, Vagrant Cascadian wrote:
> On 2015-03-24, Wolfgang Schweer wrote:
> > On Mon, Mar 23, 2015 at 12:02:05PM -0700, Vagrant Cascadian wrote:
> >> >> On Tue, Mar 17, 2015 at 10:00:08PM +0100, Wolfgang Schweer wrote:
> > Confirmed after having started an USB stick installation on real (and 
> > very old) hardware; something like /dev/sdXY is mounted on /cdrom inside 
> > d-i environment.
> >
> > Inspired by this observation I tried this patch in the virtualbox 
> > environment (booting from 'cd') and as well on bare metal w/ USB stick:
> >
> > --- a/ltsp-client-builder.postinst	2015-02-07 18:30:46.000000000 +0100
> > +++ b/ltsp-client-builder.postinst	2015-03-24 16:04:09.510087326 +0100
> > @@ -64,7 +64,7 @@
> >  db_progress STEP 1
> >  
> >  if [ "$USE_CDROM" != "false" ] && [ ! -f /target/media/cdrom/.disk/info ]; then
> > -    chroot /target mount /media/cdrom
> > +    mount $(mount | grep cdrom | cut -d' ' -f1 | head -1) /target/media/cdrom
> >      log "mounting /media/cdrom"
> >  fi
> >  
> ...
> > Installation succeded in both cases. 'head -1' is most probably 
> > unneeded, added just in case the device is mounted twice. It won't do 
> > any harm though, I guess.
> 
> I'll try reworking this patch a bit, as it can stand to be more robust
> in general, but "fixing" this without understanding what exactly is
> wrong, and without being able to reproduce the bug on a standard
> debian-installer install worries me...

Yes. The reason might be the different ordering (grub-install/ltsp 
chroot) and the cd therefore still being mounted on /cdrom/ (d-i env). 
Mounting the same device for the second time would only succed then if 
done in d-i env as well (as opposed to inside target). That was the idea 
for my patch.
 
> One obvious difference I've seen so far is debian-edu runs
> ltsp-client-builder after grub-installer.

Yes, but I had no luck to figure out why this happens. And I don't 
understand why the mount problem doesn't show up with USB stick 
installs if ordering is the reason.
 
> Do debian-edu installs modify /etc/fstab in a way that would result in
> /media/cdrom not being mountable?

AFAICT, no. 
 
> What other differences are there in a debian-edu install?

So far I'm not aware of any other ones.

Wolfgang

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 949 bytes
Desc: Digital signature
URL: <http://lists.alioth.debian.org/pipermail/pkg-ltsp-devel/attachments/20150330/1fdfd1d2/attachment.sig>