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[Bug 1708572] Re: Unable to live-migrate : Disk of instance is too large

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Denis Meltsaykin <dmeltsaykin@xxxxxxxxxxxx>
Date: Tue, 10 Oct 2017 08:18:23 -0000
Reply-to: Bug 1708572 <1708572@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Also affects: nova
   Importance: Undecided
       Status: New

** No longer affects: mos

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https://bugs.launchpad.net/bugs/1708572

Title:
  Unable to live-migrate : Disk of instance is too large

Status in OpenStack Compute (nova):
  New

Bug description:
  os：centos7.3
  openstack：ocata

  when I　tried to live-migrate　an instance，it is wrong:
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server Traceback (most recent call last):
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 155, in _process_incoming
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     res = self.dispatcher.dispatch(message)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 222, in dispatch
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     return self._do_dispatch(endpoint, method, ctxt, args)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 192, in _do_dispatch
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     result = func(ctxt, **new_args)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/exception_wrapper.py", line 75, in wrapped
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     function_name, call_dict, binary)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     self.force_reraise()
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/exception_wrapper.py", line 66, in wrapped
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     return f(self, context, *args, **kw)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/compute/utils.py", line 686, in decorated_function
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     return function(self, context, *args, **kwargs)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 216, in decorated_function
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     kwargs['instance'], e, sys.exc_info())
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     self.force_reraise()
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     six.reraise(self.type_, self.value, self.tb)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 204, in decorated_function
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     return function(self, context, *args, **kwargs)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 5281, in check_can_live_migrate_source
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     block_device_info)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5750, in check_can_live_migrate_source
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     block_device_info)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server   File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 5874, in _assert_dest_node_has_enough_disk
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server     raise exception.MigrationPreCheckError(reason=reason)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server MigrationPreCheckError: Migration pre-check error: Unable to migrate e9411b18-ce84-4094-8811-ad9675c245f3: Disk of instance is too large(available on destination host:-458487758848 < need:21692416)
  2017-07-28 11:33:03.917 18473 ERROR oslo_messaging.rpc.server.

  I found the free space of the destination host is -458487758848(A negative number).
  The same bug is in https://bugs.launchpad.net/mos/+bug/1650490
  But I don't kwon how to update my nova.

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