[Bug 879710] [NEW] ubuntu-vm-builder crashes when trying to umount tmp directory.

[Shane Harbour]

Public bug reported:

Description:	Ubuntu 11.10
Release:	11.10

ubuntu-vm-builder:
  Installed: 0.12.4+bzr469-0ubuntu1
  Candidate: 0.12.4+bzr469-0ubuntu1
  Version table:
 *** 0.12.4+bzr469-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ oneiric/universe amd64 Packages
        100 /var/lib/dpkg/status


I've tried creating VM 10-12 times in the last 24 hours with different configurations and I've only had it work once.  

Command line:
sudo ubuntu-vm-builder kvm ubuntu --suite oneiric --flavour virtual --arch amd64 -o --libvirt qemu:///system --hostname ldaptest --bridge br0 --user shane --pass changeme --addpkg acpid --addpkg openssh-server

Error:
2011-10-21 16:38:48,590 INFO    : umount: /tmp/tmpAyJUcY/dev: device is busy.
2011-10-21 16:38:48,590 INFO    :         (In some cases useful info about processes that use
2011-10-21 16:38:48,591 INFO    :          the device is found by lsof(8) or fuser(1))
2011-10-21 16:38:48,591 INFO    : Cleaning up
2011-10-21 16:38:48,591 ERROR   : Process (['umount', '/tmp/tmpAyJUcY/dev']) returned 1. stdout: , stderr: umount: /tmp/tmpAyJUcY/dev: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))

Traceback (most recent call last):
  File "/usr/bin/ubuntu-vm-builder", line 24, in <module>
    uvb.main()
  File "/usr/lib/python2.7/dist-packages/VMBuilder/contrib/cli.py", line 216, in main
    distro.build_chroot()
  File "/usr/lib/python2.7/dist-packages/VMBuilder/distro.py", line 84, in build_chroot
    self.call_hooks('configure_os')
  File "/usr/lib/python2.7/dist-packages/VMBuilder/distro.py", line 67, in call_hooks
    call_hooks(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 165, in call_hooks
    getattr(context, func, log_no_such_method)(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/ubuntu/distro.py", line 155, in configure_os
    self.suite.unmount_dev()
  File "/usr/lib/python2.7/dist-packages/VMBuilder/plugins/ubuntu/dapper.py", line 118, in unmount_dev
    run_cmd('umount', '%s/dev' % self.context.chroot_dir)
  File "/usr/lib/python2.7/dist-packages/VMBuilder/util.py", line 120, in run_cmd
    raise VMBuilderException, "Process (%s) returned %d. stdout: %s, stderr: %s" % (args.__repr__(), status, mystdout.buf, mystderr.buf)
VMBuilder.exception.VMBuilderException: Process (['umount', '/tmp/tmpAyJUcY/dev']) returned 1. stdout: , stderr: umount: /tmp/tmpAyJUcY/dev: device is busy.
        (In some cases useful info about processes that use
         the device is found by lsof(8) or fuser(1))

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubuntu-vm-builder 0.12.4+bzr469-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Fri Oct 21 16:39:08 2011
InstallationMedia: Xubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: vm-builder
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: vm-builder (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug oneiric

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Title:
  ubuntu-vm-builder crashes when trying to umount tmp directory.

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