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[Bug 1662245] [NEW] Snapshoting fails in Mitaka

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: George <lmihaiescu@xxxxxxxxx>
Date: Mon, 06 Feb 2017 16:49:33 -0000
Reply-to: Bug 1662245 <1662245@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

Description
===========
Running Mitaka installed on Ubuntu 14.04 (upgraded from Juno all the way to Mitaka). The dashboard reports success even though no snapshot is created.


Steps to reproduce
==================
Take snapshot using dashboard or the Openstack client.
 
Expected result
===============
New snapshot gets created, image registered in Glance.

Actual result
=============
Dashboard reports success right away, the image shows up in the images tab in Dashboard shortly before changing status to "Deleted" and disappearing.

The following message gets logged in "/var/log/nova/nova-compute.log".

2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher [req-81b0372a-b2d4-4e30-b0bf-1f54de71f7d9 1344234bf2e54520bbcc9585e442ce78 2fb7b98d74134a37b9fba88856f60b78 - - -] Exception during message handling: internal error: unable to execute QEMU command 'migrate': Migration disabled: failed to allocate shared memory
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher Traceback (most recent call last):
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     incoming.message))
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 185, in _dispatch
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 110, in wrapped
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     payload)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 89, in wrapped
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return f(self, context, *args, **kw)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 359, in decorated_function
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     LOG.warning(msg, e, instance=instance)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 328, in decorated_function
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 387, in decorated_function
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     kwargs['instance'], e, sys.exc_info())
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 375, in decorated_function
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 435, in decorated_function
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     instance=instance)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 425, in decorated_function
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     *args, **kwargs)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 3158, in snapshot_instance
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     task_states.IMAGE_SNAPSHOT)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 3188, in _snapshot_instance
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     update_task_state)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1667, in snapshot
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     instance)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1760, in _prepare_domain_for_snapshot
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.suspend(context, instance)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2649, in suspend
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     guest.save_memory_state()
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/guest.py", line 379, in save_memory_state
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self._domain.managedSave(0)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 186, in doit
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     result = proxy_call(self._autowrap, f, *args, **kwargs)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 144, in proxy_call
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     rv = execute(f, *args, **kwargs)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 125, in execute
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(c, e, tb)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 83, in tworker
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     rv = meth(*args, **kwargs)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1403, in managedSave
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     if ret == -1: raise libvirtError ('virDomainManagedSave() failed', dom=self)
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher libvirtError: internal error: unable to execute QEMU command 'migrate': Migration disabled: failed to allocate shared memory
2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher


Environment
===========

root@compute9-r2:~# dpkg -l | egrep "qemu|libvirt|kvm|nova"
ii  ipxe-qemu                             1.0.0+git-20131111.c3d1e78-2ubuntu1.1 all          PXE boot firmware - ROM images for qemu
ii  libvirt-bin                           1.3.1-1ubuntu10.6~cloud0              amd64        programs for the libvirt library
ii  libvirt0:amd64                        1.3.1-1ubuntu10.6~cloud0              amd64        library for interfacing with different virtualization systems
ii  nova-common                           2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - common files
ii  nova-compute                          2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - compute node base
ii  nova-compute-kvm                      2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - compute node (KVM)
ii  nova-compute-libvirt                  2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - compute node libvirt support
ii  python-libvirt                        1.3.1-1ubuntu1~cloud0                 amd64        libvirt Python bindings
ii  python-nova                           2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute Python libraries
ii  python-novaclient                     2:3.3.1-2ubuntu1~cloud0               all          client library for OpenStack Compute API - Python 2.7
ii  qemu-block-extra:amd64                1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        extra block backend modules for qemu-system and qemu-utils
ii  qemu-slof                             20151103+dfsg-1ubuntu1~cloud0         all          Slimline Open Firmware -- QEMU PowerPC version
ii  qemu-system                           1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries
ii  qemu-system-arm                       1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (arm)
ii  qemu-system-common                    1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (common files)
ii  qemu-system-mips                      1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (mips)
ii  qemu-system-misc                      1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (miscelaneous)
ii  qemu-system-ppc                       1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (ppc)
ii  qemu-system-sparc                     1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (sparc)
ii  qemu-system-x86                       1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (x86)
ii  qemu-utils                            1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU utilities


Researching the error message I found
https://bugs.launchpad.net/fuel/+bug/1638269.

After I applied the patch https://review.fuel-
infra.org/#/c/28086/2/debian/apparmor/libvirt-qemu and restarting the
instance, the snapshot is working fine.


I'm not sure if this bug should be recorded with Nova or Ubuntu..

Thank you.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1662245

Title:
  Snapshoting fails in Mitaka

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========
  Running Mitaka installed on Ubuntu 14.04 (upgraded from Juno all the way to Mitaka). The dashboard reports success even though no snapshot is created.

  
  Steps to reproduce
  ==================
  Take snapshot using dashboard or the Openstack client.
   
  Expected result
  ===============
  New snapshot gets created, image registered in Glance.

  Actual result
  =============
  Dashboard reports success right away, the image shows up in the images tab in Dashboard shortly before changing status to "Deleted" and disappearing.

  The following message gets logged in "/var/log/nova/nova-compute.log".

  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher [req-81b0372a-b2d4-4e30-b0bf-1f54de71f7d9 1344234bf2e54520bbcc9585e442ce78 2fb7b98d74134a37b9fba88856f60b78 - - -] Exception during message handling: internal error: unable to execute QEMU command 'migrate': Migration disabled: failed to allocate shared memory
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher Traceback (most recent call last):
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     incoming.message))
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 185, in _dispatch
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return self._do_dispatch(endpoint, method, ctxt, args)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     result = func(ctxt, **new_args)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 110, in wrapped
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     payload)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 89, in wrapped
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return f(self, context, *args, **kw)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 359, in decorated_function
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     LOG.warning(msg, e, instance=instance)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 328, in decorated_function
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 387, in decorated_function
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     kwargs['instance'], e, sys.exc_info())
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 375, in decorated_function
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     return function(self, context, *args, **kwargs)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 435, in decorated_function
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     instance=instance)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.force_reraise()
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(self.type_, self.value, self.tb)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 425, in decorated_function
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     *args, **kwargs)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 3158, in snapshot_instance
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     task_states.IMAGE_SNAPSHOT)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 3188, in _snapshot_instance
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     update_task_state)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1667, in snapshot
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     instance)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 1760, in _prepare_domain_for_snapshot
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self.suspend(context, instance)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2649, in suspend
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     guest.save_memory_state()
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/guest.py", line 379, in save_memory_state
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     self._domain.managedSave(0)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 186, in doit
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     result = proxy_call(self._autowrap, f, *args, **kwargs)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 144, in proxy_call
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     rv = execute(f, *args, **kwargs)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 125, in execute
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     six.reraise(c, e, tb)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 83, in tworker
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     rv = meth(*args, **kwargs)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher   File "/usr/lib/python2.7/dist-packages/libvirt.py", line 1403, in managedSave
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher     if ret == -1: raise libvirtError ('virDomainManagedSave() failed', dom=self)
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher libvirtError: internal error: unable to execute QEMU command 'migrate': Migration disabled: failed to allocate shared memory
  2017-02-06 10:51:36.258 12196 ERROR oslo_messaging.rpc.dispatcher

  
  Environment
  ===========

  root@compute9-r2:~# dpkg -l | egrep "qemu|libvirt|kvm|nova"
  ii  ipxe-qemu                             1.0.0+git-20131111.c3d1e78-2ubuntu1.1 all          PXE boot firmware - ROM images for qemu
  ii  libvirt-bin                           1.3.1-1ubuntu10.6~cloud0              amd64        programs for the libvirt library
  ii  libvirt0:amd64                        1.3.1-1ubuntu10.6~cloud0              amd64        library for interfacing with different virtualization systems
  ii  nova-common                           2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - common files
  ii  nova-compute                          2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - compute node base
  ii  nova-compute-kvm                      2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - compute node (KVM)
  ii  nova-compute-libvirt                  2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute - compute node libvirt support
  ii  python-libvirt                        1.3.1-1ubuntu1~cloud0                 amd64        libvirt Python bindings
  ii  python-nova                           2:13.1.2-0ubuntu2~cloud0              all          OpenStack Compute Python libraries
  ii  python-novaclient                     2:3.3.1-2ubuntu1~cloud0               all          client library for OpenStack Compute API - Python 2.7
  ii  qemu-block-extra:amd64                1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        extra block backend modules for qemu-system and qemu-utils
  ii  qemu-slof                             20151103+dfsg-1ubuntu1~cloud0         all          Slimline Open Firmware -- QEMU PowerPC version
  ii  qemu-system                           1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries
  ii  qemu-system-arm                       1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (arm)
  ii  qemu-system-common                    1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (common files)
  ii  qemu-system-mips                      1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (mips)
  ii  qemu-system-misc                      1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (miscelaneous)
  ii  qemu-system-ppc                       1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (ppc)
  ii  qemu-system-sparc                     1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (sparc)
  ii  qemu-system-x86                       1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU full system emulation binaries (x86)
  ii  qemu-utils                            1:2.5+dfsg-5ubuntu10.5~cloud0         amd64        QEMU utilities


  
  Researching the error message I found https://bugs.launchpad.net/fuel/+bug/1638269.

  After I applied the patch https://review.fuel-
  infra.org/#/c/28086/2/debian/apparmor/libvirt-qemu and restarting the
  instance, the snapshot is working fine.

  
  I'm not sure if this bug should be recorded with Nova or Ubuntu..

  Thank you.

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Follow ups

[Bug 1662245] Re: Snapshoting fails in Mitaka
From: Lee Yarwood, 2017-02-07