autopkgtest + chroot howto ? - Was: Re: Is it possible to run autopkgtest without a virtual machine ?

Antonio Terceiro terceiro at
Fri Feb 7 13:09:36 UTC 2014

On Sun, Jan 26, 2014 at 06:09:51PM +0100, Martin Pitt wrote:
> I advise to use the schroot runner instead. schroots are easy to set
> up these days with mk-sbuild, and with some additional love (like
> installing and configuring apt-cacher-ng and symlinking
> /var/lib/schroot/union/overlay/ and /var/lib/schroot/unpack/ to /tmp/,
> and having /tmp on a tmpfs),  set up, tear down, and package
> installation are extremely fast.

This schroot tip is precious! I have just reduced the build time (which
was mostly spent installing dependencies -- I was already using
apt-cacher-ng) of a package from ~4min to ~30s!

But instead of symlinking /var/lib/schroot/union/overlay/¹ , I configured
my sbuild chroots adding


¹ that would affect all my chroots, not only the ones I use for sbuild.
  I expected the non-sbuild ones to still be there after a reboot. ;-)

Antonio Terceiro <terceiro at>
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