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

[Vagrant Cascadian]

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...


I speculated that debian-edu installs already had ltsp-server-standalone
installed and would result in a different state when ltsp-client-builder
invokes apt-install ltsp-server-standalone... but that didn't result in
any change with debian-installer rc4 (20150324).


Earlier in ltsp-client-builder.postinst it checks for /cdrom/.disk/info,
and that's clearly working for fine with debian-edu installs.


One obvious difference I've seen so far is debian-edu runs
ltsp-client-builder after grub-installer.


Do debian-edu installs modify /etc/fstab in a way that would result in
/media/cdrom not being mountable?


What other differences are there in a debian-edu install?


live well,
  vagrant
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