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[Bug 1300250] Re: Cannot attach volume to a livecd based vm instance

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Sean Dague <sean@xxxxxxxxx>
Date: Tue, 09 Sep 2014 14:37:17 -0000
Reply-to: Bug 1300250 <1300250@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: nova
       Status: New => Opinion

** Changed in: nova
   Importance: Undecided => Wishlist

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https://bugs.launchpad.net/bugs/1300250

Title:
  Cannot attach volume to a livecd based vm instance

Status in OpenStack Compute (Nova):
  Opinion

Bug description:
  It is impossible to attach volume to a LiveCD based vm instance. I
  managed to do this finally by hacking the nova database accordig to:
  http://paste.openstack.org/show/48247/

  Part of log with a problem:

  k/nova/nova/openstack/common/lockutils.py:252
  2014-03-31 13:29:44.117 ERROR nova.virt.block_device [req-2cfd1b0b-610f-40a0-8ed4-97ecd6128beb biocloud_psnc biocloud] [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9] Driver failed to atta
  ch volume 1a046bbe-a326-4dbe-9f05-e3f2fa40a4e7 at /dev/hda
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9] Traceback (most recent call last):
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/block_device.py", line 239, in attach
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     device_type=self['device_type'], encryption=encryption)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1246, in attach_volume
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     disk_dev)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     six.reraise(self.type_, self.value, self.tb)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1233, in attach_volume
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     virt_dom.attachDeviceFlags(conf.to_xml(), flags)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 179, in d
  oit
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     result = proxy_call(self._autowrap, f, *args, **kwargs)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 139, in p
  roxy_call
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     rv = execute(f,*args,**kwargs)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 77, in tw
  orker
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     rv = meth(*args,**kwargs)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 420, in attachDeviceFl
  ags
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     if ret == -1: raise libvirtError ('virDomainAttachDeviceFlags() failed', dom=
  self)
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9] libvirtError: invalid argument: target hda already exists.
  2014-03-31 13:29:44.117 21366 TRACE nova.virt.block_device [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]
  2014-03-31 13:29:44.162 DEBUG nova.volume.cinder [req-2cfd1b0b-610f-40a0-8ed4-97ecd6128beb biocloud_psnc biocloud] Cinderclient connection created using URL: http://biocloud.vph.psnc.pl:877
  6/v1/8e4b75100b0d42faa562c1b8f06984cf cinderclient /opt/stack/nova/nova/volume/cinder.py:93
  2014-03-31 13:29:44.167 21366 INFO requests.packages.urllib3.connectionpool [-] Starting new HTTP connection (1): biocloud.vph.psnc.pl
  2014-03-31 13:29:44.940 21366 DEBUG requests.packages.urllib3.connectionpool [-] "POST /v1/8e4b75100b0d42faa562c1b8f06984cf/volumes/1a046bbe-a326-4dbe-9f05-e3f2fa40a4e7/action HTTP/1.1" 202
   0 _make_request /usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/connectionpool.py:344
  2014-03-31 13:29:44.942 ERROR nova.compute.manager [req-2cfd1b0b-610f-40a0-8ed4-97ecd6128beb biocloud_psnc biocloud] [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9] Failed to attach 1a046b
  be-a326-4dbe-9f05-e3f2fa40a4e7 at /dev/hda
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9] Traceback (most recent call last):
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/compute/manager.py", line 4135, in _attach_volume
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     do_check_attach=False, do_driver_attach=True)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/block_device.py", line 44, in wrapped
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     ret_val = method(obj, context, *args, **kwargs)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/block_device.py", line 248, in attach
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     connector)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     six.reraise(self.type_, self.value, self.tb)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/block_device.py", line 239, in attach
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     device_type=self['device_type'], encryption=encryption)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1246, in attach_volume
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     disk_dev)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/openstack/common/excutils.py", line 68, in __exit__
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     six.reraise(self.type_, self.value, self.tb)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1233, in attach_volume
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     virt_dom.attachDeviceFlags(conf.to_xml(), flags)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 179, in doi
  t
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     result = proxy_call(self._autowrap, f, *args, **kwargs)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 139, in pro
  xy_call
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     rv = execute(f,*args,**kwargs)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/local/lib/python2.7/dist-packages/eventlet/tpool.py", line 77, in twor
  ker
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     rv = meth(*args,**kwargs)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 420, in attachDeviceFlag
  s
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]     if ret == -1: raise libvirtError ('virDomainAttachDeviceFlags() failed', dom=se
  lf)
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9] libvirtError: invalid argument: target hda already exists.
  2014-03-31 13:29:44.942 21366 TRACE nova.compute.manager [instance: 5a1c854d-5571-4d0e-8414-ae60f57571d9]

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References

[Bug 1300250] [NEW] Cannot attach volume to a livecd based vm instance
From: Dawid, 2014-03-31