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[ling-yun <zengyunling@xxxxxxxxxx>]

Public bug reported:

When doing backup on a vm which boot from cinder volume, it firstly shutdown vm and then do backup work.
But it fails and the detail exception log could be seen in the last part.
When we need nova to backup a vm booted from cinder volume, we could do this by using cinder's function----copy volume to image.
I think we could raise an exception when nova backup a vm from cinder volume.

======Nova-compute exception log===================
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 134, in _dispatch_and_reply
    incoming.message))
  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 177, in _dispatch
    return self._do_dispatch(endpoint, method, ctxt, args)
  File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 123, in _do_dispatch
    result = getattr(endpoint, method)(ctxt, **new_args)
  File "/opt/stack/nova/nova/exception.py", line 88, in wrapped
    payload)
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/exception.py", line 71, in wrapped
    return f(self, context, *args, **kw)
  File "/opt/stack/nova/nova/compute/manager.py", line 285, in decorated_function
    pass
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/compute/manager.py", line 271, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 313, in decorated_function
    kwargs['instance'], e, sys.exc_info())
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/compute/manager.py", line 301, in decorated_function
    return function(self, context, *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 2741, in backup_instance
    self._do_snapshot_instance(context, image_id, instance, rotation)
  File "/opt/stack/nova/nova/compute/manager.py", line 360, in decorated_function
    % image_id, instance=instance)
  File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
    six.reraise(self.type_, self.value, self.tb)
  File "/opt/stack/nova/nova/compute/manager.py", line 351, in decorated_function
    *args, **kwargs)
  File "/opt/stack/nova/nova/compute/manager.py", line 2729, in _do_snapshot_instance
    task_states.IMAGE_BACKUP)
  File "/opt/stack/nova/nova/compute/manager.py", line 2807, in _snapshot_instance
    update_task_state)
  File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1501, in snapshot
    image_type=source_format)
  File "/opt/stack/nova/nova/virt/libvirt/imagebackend.py", line 716, in snapshot
    return backend(path=disk_path)
  File "/opt/stack/nova/nova/virt/libvirt/imagebackend.py", line 421, in __init__
    info = libvirt_utils.logical_volume_info(path)
  File "/opt/stack/nova/nova/virt/libvirt/utils.py", line 336, in logical_volume_info
    '--separator', '|', path, run_as_root=True)
  File "/opt/stack/nova/nova/virt/libvirt/utils.py", line 54, in execute
    return utils.execute(*args, **kwargs)
  File "/opt/stack/nova/nova/utils.py", line 164, in execute
    return processutils.execute(*cmd, **kwargs)
  File "/opt/stack/nova/nova/openstack/common/processutils.py", line 194, in execute
    cmd=' '.join(cmd))
ProcessExecutionError: Unexpected error while running command.
Command: lvs -o vg_all,lv_all --separator | /dev/disk/by-path/ip-10.250.10.193:3260-iscsi-iqn.2010-10.org.openstack:volume-9ba91e05-050b-4dda-ac3c-9f3630c704c0-lun-1
Exit code: 5
Stdout: ''
Stderr: '  "disk/by-path/ip-10.250.10.193:3260-iscsi-iqn.2010-10.org.openstack:volume-9ba91e05-050b-4dda-ac3c-9f3630c704c0-lun-1": Invalid path for Logical Volume\n'

** Affects: nova
     Importance: Undecided
     Assignee: ling-yun (zengyunling)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => ling-yun (zengyunling)

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https://bugs.launchpad.net/bugs/1356737

Title:
  nova backup vm should not backup those vm boot from cinder volume

Status in OpenStack Compute (Nova):
  New

Bug description:
  When doing backup on a vm which boot from cinder volume, it firstly shutdown vm and then do backup work.
  But it fails and the detail exception log could be seen in the last part.
  When we need nova to backup a vm booted from cinder volume, we could do this by using cinder's function----copy volume to image.
  I think we could raise an exception when nova backup a vm from cinder volume.

  ======Nova-compute exception log===================
  Traceback (most recent call last):
    File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 134, in _dispatch_and_reply
      incoming.message))
    File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 177, in _dispatch
      return self._do_dispatch(endpoint, method, ctxt, args)
    File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 123, in _do_dispatch
      result = getattr(endpoint, method)(ctxt, **new_args)
    File "/opt/stack/nova/nova/exception.py", line 88, in wrapped
      payload)
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/exception.py", line 71, in wrapped
      return f(self, context, *args, **kw)
    File "/opt/stack/nova/nova/compute/manager.py", line 285, in decorated_function
      pass
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/compute/manager.py", line 271, in decorated_function
      return function(self, context, *args, **kwargs)
    File "/opt/stack/nova/nova/compute/manager.py", line 313, in decorated_function
      kwargs['instance'], e, sys.exc_info())
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/compute/manager.py", line 301, in decorated_function
      return function(self, context, *args, **kwargs)
    File "/opt/stack/nova/nova/compute/manager.py", line 2741, in backup_instance
      self._do_snapshot_instance(context, image_id, instance, rotation)
    File "/opt/stack/nova/nova/compute/manager.py", line 360, in decorated_function
      % image_id, instance=instance)
    File "/opt/stack/nova/nova/openstack/common/excutils.py", line 82, in __exit__
      six.reraise(self.type_, self.value, self.tb)
    File "/opt/stack/nova/nova/compute/manager.py", line 351, in decorated_function
      *args, **kwargs)
    File "/opt/stack/nova/nova/compute/manager.py", line 2729, in _do_snapshot_instance
      task_states.IMAGE_BACKUP)
    File "/opt/stack/nova/nova/compute/manager.py", line 2807, in _snapshot_instance
      update_task_state)
    File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 1501, in snapshot
      image_type=source_format)
    File "/opt/stack/nova/nova/virt/libvirt/imagebackend.py", line 716, in snapshot
      return backend(path=disk_path)
    File "/opt/stack/nova/nova/virt/libvirt/imagebackend.py", line 421, in __init__
      info = libvirt_utils.logical_volume_info(path)
    File "/opt/stack/nova/nova/virt/libvirt/utils.py", line 336, in logical_volume_info
      '--separator', '|', path, run_as_root=True)
    File "/opt/stack/nova/nova/virt/libvirt/utils.py", line 54, in execute
      return utils.execute(*args, **kwargs)
    File "/opt/stack/nova/nova/utils.py", line 164, in execute
      return processutils.execute(*cmd, **kwargs)
    File "/opt/stack/nova/nova/openstack/common/processutils.py", line 194, in execute
      cmd=' '.join(cmd))
  ProcessExecutionError: Unexpected error while running command.
  Command: lvs -o vg_all,lv_all --separator | /dev/disk/by-path/ip-10.250.10.193:3260-iscsi-iqn.2010-10.org.openstack:volume-9ba91e05-050b-4dda-ac3c-9f3630c704c0-lun-1
  Exit code: 5
  Stdout: ''
  Stderr: '  "disk/by-path/ip-10.250.10.193:3260-iscsi-iqn.2010-10.org.openstack:volume-9ba91e05-050b-4dda-ac3c-9f3630c704c0-lun-1": Invalid path for Logical Volume\n'

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