[buildd-tools-devel] Bug#726375: Bug#726375: [Pkg-systemd-maintainers] Bug#726375: schroot: Fails during umount on system booted with systemd

[Roger Leigh]

On Mon, Mar 10, 2014 at 04:00:45PM +0100, Christoph Berg wrote:
> Control: tags -1 patch
> 
> Re: Michael Stapelberg 2013-11-12 <x661rxh0n3.fsf at midna.lan>
> > Hi Antonio,
> > 
> > Antonio Terceiro <terceiro at softwarelivre.org> writes:
> > > You have to create such a chroot first, for example with
> > > sbuild-createchroot(1).
> > >
> > > I am affected by a similar problem, which also only happens when the
> > > system is booted with systemd (works fine under sysvinit):
> > >
> > > $ cat /etc/schroot/chroot.d/squeeze
> > > [squeeze]
> > > type=directory
> > > description=Debian Squeeze
> > > directory=/home/terceiro/chroots/squeeze
> > > users=terceiro
> > > groups=terceiro
> > > root-users=terceiro
> > > root-groups=root
> > > $ schroot -c squeeze
> > > (squeeze) terceiro at homer:~$ exit
> > > logout
> > > E: 10mount: umount: /var/lib/schroot/mount/squeeze-78908cf6-2aca-4bf4-8209-fafe2260397f/tmp: not mounted
> > > E: squeeze-78908cf6-2aca-4bf4-8209-fafe2260397f: Chroot setup failed: stage=setup-stop
> > >
> > > Then I have to manually finish the session:
> 
> the problem is pretty bad - if you don't finish the session, but
> re-enter it, you get new mounts for the left-over bindmounts, etc - an
> exponential number of entries in /proc/mounts.

Thanks for the confirmation that the patch helps.

I'll consider applying the patch.  However, I won't be doing this
without a good justification for why systemd has broken behaviour
which has worked fine for over a decade.  This isn't a schroot bug.
This breaks any use of bind mounts for anyone doing a similar
thing.

Changing to use "shared" mountpoints is a massively breaking
change, and I've not seen anything to justify it.  How many admins
are going to be screwed over by this?  What exactly makes use of
this changed behaviour, if anything?


Regards,
Roger

-- 
  .''`.  Roger Leigh
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