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[Vj <acetone_black@xxxxxxxxxxx>]

Public bug reported:

I have setup openstack with ceph storage backend(nova, glance and cinder
all use it). Linux Bridge-ml2 is my networking plugin. When I try to do
a snapshot when the instance is running, snapshot fails. It seems that
nova is trying to freeze the  VM and try to take a cold snapshot, but
when it resumes, it fails and the snapshot that gets is deleted
immediately. Please check the nova.log attached. Taken during the
snapshot process.:

I have checked glance logs , but no errors. If you need other logs, I
will attach. I have already checked,
https://bugs.launchpad.net/nova/+bug/1334398 and
https://bugs.launchpad.net/mos/+bug/1381072, they are all related to
live snapshots , but in this case even the cold snapshot is not working.
When I stop the VM and take the snap , it works.

** Affects: nova
     Importance: Undecided
         Status: New

** Attachment added: "nova.log"
   https://bugs.launchpad.net/bugs/1419734/+attachment/4315364/+files/nova.log

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https://bugs.launchpad.net/bugs/1419734

Title:
  Nova snapshot fails when the instance is running(ceph backend)

Status in OpenStack Compute (Nova):
  New

Bug description:
  I have setup openstack with ceph storage backend(nova, glance and
  cinder all use it). Linux Bridge-ml2 is my networking plugin. When I
  try to do a snapshot when the instance is running, snapshot fails. It
  seems that nova is trying to freeze the  VM and try to take a cold
  snapshot, but when it resumes, it fails and the snapshot that gets is
  deleted immediately. Please check the nova.log attached. Taken during
  the snapshot process.:

  I have checked glance logs , but no errors. If you need other logs, I
  will attach. I have already checked,
  https://bugs.launchpad.net/nova/+bug/1334398 and
  https://bugs.launchpad.net/mos/+bug/1381072, they are all related to
  live snapshots , but in this case even the cold snapshot is not
  working. When I stop the VM and take the snap , it works.

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