[Qemu-devel] [Bug 1816189] [NEW] Unable to create or revert snapshots

[Qemu-devel] [Bug 1816189] [NEW] Unable to create or revert snapshots

[Larry Dewey]

Public bug reported:

With an update to Qemu (3.1.x) I am unable to revert snapshots using
virt-manager or virsh. Virtual Machines existing before the update seem
to function properly. It is only after creating a new machine that
snapshots are misbehaving. I tested spinning up vms of tumbleweed,
leap15, and ubuntu 18.04. Each of them had the following issues:

- With the machine running, live reversions act like they apply, but no changes are actually made.
- With the machine paused, reversion also does not apply.
- With the machine turned off, reversion is not possible. Virsh is unable to find the snapshot, and virt-manager errors out with:

Error running snapshot 'FreshInstall': internal error: qemu unexpectedly
closed the monitor: 2019-01-15T19:19:46.020247Z qemu-system-x86_64:
Device 'drive-virtio-disk0' does not have the requested snapshot
'FreshInstall'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
    callback(asyncjob, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
    callback(*args, **kwargs)
  File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in newfn
    ret = fn(self, *args, **kwargs)
  File "/usr/share/virt-manager/virtManager/domain.py", line 1105, in revert_to_snapshot
    self._backend.revertToSnapshot(snap.get_backend())
  File "/usr/lib64/python3.6/site-packages/libvirt.py", line 2024, in revertToSnapshot
    if ret == -1: raise libvirtError ('virDomainRevertToSnapshot() failed', dom=self)

libvirt.libvirtError: internal error: qemu unexpectedly closed the
monitor: 2019-01-15T19:19:46.020247Z qemu-system-x86_64: Device 'drive-
virtio-disk0' does not have the requested snapshot 'FreshInstall'

After doing some digging, the error occurs because of the following commit:
d98f26073bebddcd3da0ba1b86c3a34e840c0fb8

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: nest nested nested-virt nesting qemu snap snapshots virtulazation

** Attachment added: "qemu-debug-logs"
   https://bugs.launchpad.net/bugs/1816189/+attachment/5238920/+files/snapshot-specific-debug-output.txt

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Title:
  Unable to create or revert snapshots

Status in QEMU:
  New

Bug description:
  With an update to Qemu (3.1.x) I am unable to revert snapshots using
  virt-manager or virsh. Virtual Machines existing before the update
  seem to function properly. It is only after creating a new machine
  that snapshots are misbehaving. I tested spinning up vms of
  tumbleweed, leap15, and ubuntu 18.04. Each of them had the following
  issues:

  - With the machine running, live reversions act like they apply, but no changes are actually made.
  - With the machine paused, reversion also does not apply.
  - With the machine turned off, reversion is not possible. Virsh is unable to find the snapshot, and virt-manager errors out with:

  Error running snapshot 'FreshInstall': internal error: qemu
  unexpectedly closed the monitor: 2019-01-15T19:19:46.020247Z qemu-
  system-x86_64: Device 'drive-virtio-disk0' does not have the requested
  snapshot 'FreshInstall'

  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
      callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
      callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in newfn
      ret = fn(self, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1105, in revert_to_snapshot
      self._backend.revertToSnapshot(snap.get_backend())
    File "/usr/lib64/python3.6/site-packages/libvirt.py", line 2024, in revertToSnapshot
      if ret == -1: raise libvirtError ('virDomainRevertToSnapshot() failed', dom=self)

  libvirt.libvirtError: internal error: qemu unexpectedly closed the
  monitor: 2019-01-15T19:19:46.020247Z qemu-system-x86_64: Device
  'drive-virtio-disk0' does not have the requested snapshot
  'FreshInstall'

  After doing some digging, the error occurs because of the following commit:
  d98f26073bebddcd3da0ba1b86c3a34e840c0fb8

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[Qemu-devel] [Bug 1816189] Re: Unable to create or revert snapshots

[Larry Dewey]

Adding System Information

** Attachment added: "System-Details.txt"
   https://bugs.launchpad.net/qemu/+bug/1816189/+attachment/5238921/+files/System-Details.txt

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Title:
  Unable to create or revert snapshots

Status in QEMU:
  New

Bug description:
  With an update to Qemu (3.1.x) I am unable to revert snapshots using
  virt-manager or virsh. Virtual Machines existing before the update
  seem to function properly. It is only after creating a new machine
  that snapshots are misbehaving. I tested spinning up vms of
  tumbleweed, leap15, and ubuntu 18.04. Each of them had the following
  issues:

  - With the machine running, live reversions act like they apply, but no changes are actually made.
  - With the machine paused, reversion also does not apply.
  - With the machine turned off, reversion is not possible. Virsh is unable to find the snapshot, and virt-manager errors out with:

  Error running snapshot 'FreshInstall': internal error: qemu
  unexpectedly closed the monitor: 2019-01-15T19:19:46.020247Z qemu-
  system-x86_64: Device 'drive-virtio-disk0' does not have the requested
  snapshot 'FreshInstall'

  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
      callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
      callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in newfn
      ret = fn(self, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1105, in revert_to_snapshot
      self._backend.revertToSnapshot(snap.get_backend())
    File "/usr/lib64/python3.6/site-packages/libvirt.py", line 2024, in revertToSnapshot
      if ret == -1: raise libvirtError ('virDomainRevertToSnapshot() failed', dom=self)

  libvirt.libvirtError: internal error: qemu unexpectedly closed the
  monitor: 2019-01-15T19:19:46.020247Z qemu-system-x86_64: Device
  'drive-virtio-disk0' does not have the requested snapshot
  'FreshInstall'

  After doing some digging, the error occurs because of the following commit:
  d98f26073bebddcd3da0ba1b86c3a34e840c0fb8

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[Qemu-devel] [Bug 1816189] Re: Unable to create or revert snapshots

[Larry Dewey]

Before kernel 4.20.x this was not an issue as nested virtualization was
not enabled by default. In any distribution using 4.20.x or later,
snapshots and migration do not work.

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Title:
  Unable to create or revert snapshots

Status in QEMU:
  New

Bug description:
  With an update to Qemu (3.1.x) I am unable to revert snapshots using
  virt-manager or virsh. Virtual Machines existing before the update
  seem to function properly. It is only after creating a new machine
  that snapshots are misbehaving. I tested spinning up vms of
  tumbleweed, leap15, and ubuntu 18.04. Each of them had the following
  issues:

  - With the machine running, live reversions act like they apply, but no changes are actually made.
  - With the machine paused, reversion also does not apply.
  - With the machine turned off, reversion is not possible. Virsh is unable to find the snapshot, and virt-manager errors out with:

  Error running snapshot 'FreshInstall': internal error: qemu
  unexpectedly closed the monitor: 2019-01-15T19:19:46.020247Z qemu-
  system-x86_64: Device 'drive-virtio-disk0' does not have the requested
  snapshot 'FreshInstall'

  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
      callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
      callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in newfn
      ret = fn(self, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1105, in revert_to_snapshot
      self._backend.revertToSnapshot(snap.get_backend())
    File "/usr/lib64/python3.6/site-packages/libvirt.py", line 2024, in revertToSnapshot
      if ret == -1: raise libvirtError ('virDomainRevertToSnapshot() failed', dom=self)

  libvirt.libvirtError: internal error: qemu unexpectedly closed the
  monitor: 2019-01-15T19:19:46.020247Z qemu-system-x86_64: Device
  'drive-virtio-disk0' does not have the requested snapshot
  'FreshInstall'

  After doing some digging, the error occurs because of the following commit:
  d98f26073bebddcd3da0ba1b86c3a34e840c0fb8

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[Bug 1816189] Re: Unable to create or revert snapshots

[Thomas Huth]

Can you still reproduce this issue with the latest version of QEMU and
libvirt? Anyway, since the problem occurs with libvirt, have you already
tried to report this issue to the libvirt project instead?

** Changed in: qemu
       Status: New => Incomplete

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Title:
  Unable to create or revert snapshots

Status in QEMU:
  Incomplete

Bug description:
  With an update to Qemu (3.1.x) I am unable to revert snapshots using
  virt-manager or virsh. Virtual Machines existing before the update
  seem to function properly. It is only after creating a new machine
  that snapshots are misbehaving. I tested spinning up vms of
  tumbleweed, leap15, and ubuntu 18.04. Each of them had the following
  issues:

  - With the machine running, live reversions act like they apply, but no changes are actually made.
  - With the machine paused, reversion also does not apply.
  - With the machine turned off, reversion is not possible. Virsh is unable to find the snapshot, and virt-manager errors out with:

  Error running snapshot 'FreshInstall': internal error: qemu
  unexpectedly closed the monitor: 2019-01-15T19:19:46.020247Z qemu-
  system-x86_64: Device 'drive-virtio-disk0' does not have the requested
  snapshot 'FreshInstall'

  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
      callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
      callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in newfn
      ret = fn(self, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1105, in revert_to_snapshot
      self._backend.revertToSnapshot(snap.get_backend())
    File "/usr/lib64/python3.6/site-packages/libvirt.py", line 2024, in revertToSnapshot
      if ret == -1: raise libvirtError ('virDomainRevertToSnapshot() failed', dom=self)

  libvirt.libvirtError: internal error: qemu unexpectedly closed the
  monitor: 2019-01-15T19:19:46.020247Z qemu-system-x86_64: Device
  'drive-virtio-disk0' does not have the requested snapshot
  'FreshInstall'

  After doing some digging, the error occurs because of the following commit:
  d98f26073bebddcd3da0ba1b86c3a34e840c0fb8

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[Bug 1816189] Re: Unable to create or revert snapshots

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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Title:
  Unable to create or revert snapshots

Status in QEMU:
  Expired

Bug description:
  With an update to Qemu (3.1.x) I am unable to revert snapshots using
  virt-manager or virsh. Virtual Machines existing before the update
  seem to function properly. It is only after creating a new machine
  that snapshots are misbehaving. I tested spinning up vms of
  tumbleweed, leap15, and ubuntu 18.04. Each of them had the following
  issues:

  - With the machine running, live reversions act like they apply, but no changes are actually made.
  - With the machine paused, reversion also does not apply.
  - With the machine turned off, reversion is not possible. Virsh is unable to find the snapshot, and virt-manager errors out with:

  Error running snapshot 'FreshInstall': internal error: qemu
  unexpectedly closed the monitor: 2019-01-15T19:19:46.020247Z qemu-
  system-x86_64: Device 'drive-virtio-disk0' does not have the requested
  snapshot 'FreshInstall'

  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 75, in cb_wrapper
      callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 111, in tmpcb
      callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/libvirtobject.py", line 66, in newfn
      ret = fn(self, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1105, in revert_to_snapshot
      self._backend.revertToSnapshot(snap.get_backend())
    File "/usr/lib64/python3.6/site-packages/libvirt.py", line 2024, in revertToSnapshot
      if ret == -1: raise libvirtError ('virDomainRevertToSnapshot() failed', dom=self)

  libvirt.libvirtError: internal error: qemu unexpectedly closed the
  monitor: 2019-01-15T19:19:46.020247Z qemu-system-x86_64: Device
  'drive-virtio-disk0' does not have the requested snapshot
  'FreshInstall'

  After doing some digging, the error occurs because of the following commit:
  d98f26073bebddcd3da0ba1b86c3a34e840c0fb8

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