name resolution fails in vmdebootstrap with setup-testbed customize script

[Jean-Baptiste Lallement]

On Ubuntu Zesty, I'm running the following command to provision a debian/sid VM:
sudo vmdebootstrap \
    --verbose --serial-console --distribution=sid \
    --customize=/usr/share/autopkgtest/setup-commands/setup-testbed --user=test/test \
    --size=8G --grub --image=$IMAGE \
    --sudo --convert-qcow2 \
    --log vmbootstrap.log --log-level debug

It fails on this command:
+ chroot /tmp/tmpno5Yk_ apt-get update
Err:1 http://httpredir.debian.org/debian sid InRelease
  Temporary failure resolving 'httpredir.debian.org'
Reading package lists... Done

Name resolution works fine on the host but does not inside the chroot.
In the chroot, /etc/resolv.conf is a link to /run/systemd/resolv.conf but the target does not exist (/run is not mounted)
Name resolution works after mounting /run from the host inside the chroot or copying /etc/resolv.conf from the host.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: autopkgtest 4.3
ProcVersionSignature: Ubuntu 4.9.0-11.12-generic 4.9.0
Uname: Linux 4.9.0-11-generic x86_64
ApportVersion: 2.20.4-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Jan 26 13:24:38 2017
InstallationDate: Installed on 2014-07-15 (926 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140520)
PackageArchitecture: all
SourcePackage: autopkgtest
UpgradeStatus: Upgraded to zesty on 2015-12-08 (414 days ago)

[Martin Pitt (pitti)]

https://anonscm.debian.org/cgit/autopkgtest/autopkgtest.git/commit/?id=085b1798fa

[Launchpad Janitor (janitor)]

This bug was fixed in the package autopkgtest - 5.0.2

---------------
autopkgtest (5.0.2) unstable; urgency=medium

  * test: Adjust ChrootRunner tests for changed apt-get source invocation.
    Commit 762397342b changed the invocation of `apt-get source` and
    `dpkg-source -x`. Adjust ChrootRunner test mock commands accordingly.

 -- Martin Pitt <email address hidden> Mon, 16 Oct 2017 11:53:55 +0200