[Bug 1257304] [NEW] uvtools fails to create a virtual machine

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Not sure how to reproduce this one. I was running maas-test in the MAAS
qa lab and got the following error:

ubuntu at lenovo-RD230-01:~/maas-test$ ./bin/maas-test  --bmc-ip 192.168.22.35 --bmc-username root --bmc-password ubuntu --http-proxy=http://10.98.3.6:3128 br0 
2013-12-03 09:18:22,415 INFO Checking for KVM extensions.
2013-12-03 09:18:22,429 INFO Checking for virtualised hardware...
2013-12-03 09:18:22,517 INFO Using external proxy http://10.98.3.6:3128.
2013-12-03 09:18:22,519 INFO Downloading KVM image for series=saucy, arch=amd64...
2013-12-03 09:18:24,457 INFO Done downloading KVM image for series=saucy, arch=amd64.
2013-12-03 09:18:24,457 INFO Creating virtual machine c41f87ba-5c25-11e3-8bc6-00e081ddd1cf, arch=amd64...
ERROR

======================================================================
ERROR: setUpClass (maastest.main.ConfiguredTestMAAS)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/ubuntu/maas-test/maastest/cases.py", line 88, in setUpClass
    cls.fixtures.useFixture(cls.machine)
  File "/home/ubuntu/maas-test/maastest/cases.py", line 45, in useFixture
    super(ClassFixture, self).useFixture(fixture)
  File "/usr/lib/python2.7/dist-packages/fixtures/fixture.py", line 192, in useFixture
    fixture.setUp()
  File "/home/ubuntu/maas-test/maastest/kvmfixture.py", line 142, in setUp
    self.start()
  File "/home/ubuntu/maas-test/maastest/kvmfixture.py", line 267, in start
    input=template, check_call=True)
  File "/home/ubuntu/maas-test/maastest/utils.py", line 63, in run_command
    stderr.decode('ascii')))
Exception: Command 'sudo uvt-kvm create --ssh-public-key-file=/home/ubuntu/.config/maas-test/vm_ssh_id_rsa.pub --unsafe-caching --memory 2048 --disk 20 c41f87ba-5c25-11e3-8bc6-00e081ddd1cf arch=amd64 release=saucy --template -' failed (1):

Warning: this CLI is experimental and may change.
wrote ds.img with filesystem=iso9660 and diskformat=raw
libvirt: DBus Utils error : Connection is closed
Traceback (most recent call last):
  File "/usr/bin/uvt-kvm", line 597, in <module>
    main(sys.argv[1:])
  File "/usr/bin/uvt-kvm", line 593, in main
    args.func(parser, args)
  File "/usr/bin/uvt-kvm", line 436, in main_create
    unsafe_caching=args.unsafe_caching,
  File "/usr/bin/uvt-kvm", line 323, in create
    domain.create()
  File "/usr/lib/python2.7/dist-packages/libvirt.py", line 708, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirt.libvirtError: Connection is closed


----------------------------------------------------------------------
Ran 0 tests in 3.678s

FAILED (errors=1)

Syslog showed this error:
Dec  3 09:18:25 lenovo-RD230-01 kernel: [11447.751086] type=1400 audit(1386080305.462:55): apparmor="DENIED" operation="open" parent=2769 profile="/usr/lib/libvirt/virt-aa-helper" name="/var/lib/uvtool/libvirt/images/x-uvt-b64-Y29tLnVidW50dS5jbG91ZDpzZXJ2ZXI6MTMuMTA6YW1kNjQgMjAxMzExMTM=" pid=4967 comm="virt-aa-helper" requested_mask="r" denied_mask="r" fsuid=0 ouid=0

I noticed that dbus wasn't running so I restarted it and got the same
error. Then I restarted libvirtd-bin service which fixed the issue.

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: Incomplete

-- 
uvtools fails to create a virtual machine
https://bugs.launchpad.net/bugs/1257304
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