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* [Qemu-devel] [Bug 1816189] [NEW] Unable to create or revert snapshots
@ 2019-02-15 21:03 Larry Dewey
  2019-02-15 21:04 ` [Qemu-devel] [Bug 1816189] " Larry Dewey
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: Larry Dewey @ 2019-02-15 21:03 UTC (permalink / raw)
  To: qemu-devel

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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https://bugs.launchpad.net/bugs/1816189

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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^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-04-19  4:27 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-15 21:03 [Qemu-devel] [Bug 1816189] [NEW] Unable to create or revert snapshots Larry Dewey
2019-02-15 21:04 ` [Qemu-devel] [Bug 1816189] " Larry Dewey
2019-02-15 21:06 ` Larry Dewey
2021-02-17  8:20 ` Thomas Huth
2021-04-19  4:17 ` Launchpad Bug Tracker

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