[ovirt-users] problem while moving/copying disks: vdsm low level image copy failed

[Johan Bernhardsson]

OS Version:
RHEL - 7 - 3.1611.el7.centos
OS Description:
CentOS Linux 7
(Core)
Kernel Version:
3.10.0 - 514.16.1.el7.x86_64
KVM Version:
2.6.0 -
28.el7_3.9.1
LIBVIRT Version:
libvirt-2.0.0-10.el7_3.9
VDSM Version:
vdsm-
4.19.15-1.el7.centos
SPICE Version:
0.12.4 - 20.el7_3
GlusterFS Version:
gl
usterfs-3.8.11-1.el7
CEPH Version:
librbd1-0.94.5-1.el7

qemu-img version 2.6.0 (qemu-kvm-ev-2.6.0-28.el7_3.9.1), Copyright (c)
2004-2008 Fabrice Bellard
This is what i have on the hosts.
/Johan
On Sun, 2017-07-30 at 13:56 +0300, Benny Zlotnik wrote:
> Hi, 
> 
> Can please you provide the versions of vdsm, qemu, libvirt?
> 
> On Sun, Jul 30, 2017 at 1:01 PM, Johan Bernhardsson <johan at kafit.se>
> wrote:
> > Hello,
> > 
> > We get this error message while moving or copying some of the disks
> > on
> > our main cluster running 4.1.2 on centos7  
> > 
> > This is shown in the engine:
> > VDSM vbgkvm02 command HSMGetAllTasksStatusesVDS failed: low level
> > Image
> > copy failed
> > 
> > I can copy it inside the host. And i can use dd to copy. Haven't
> > tried
> > to run qemu-img manually yet.
> > 
> > 
> > This is from vdsm.log on the host:
> > 2017-07-28 09:07:22,741+0200 ERROR (tasks/6) [root] Job u'c82d4c53-
> > 3eb4-405e-a2d5-c4c77519360e' failed (jobs:217)
> > Traceback (most recent call last):
> >   File "/usr/lib/python2.7/site-packages/vdsm/jobs.py", line 154,
> > in
> > run
> >     self._run()
> >   File "/usr/share/vdsm/storage/sdm/api/copy_data.py", line 88, in
> > _run
> >     self._operation.wait_for_completion()
> >   File "/usr/lib/python2.7/site-packages/vdsm/qemuimg.py", line
> > 329, in
> > wait_for_completion
> >     self.poll(timeout)
> >   File "/usr/lib/python2.7/site-packages/vdsm/qemuimg.py", line
> > 324, in
> > poll
> >     self.error)
> > QImgError: cmd=['/usr/bin/taskset', '--cpu-list', '0-15',
> > '/usr/bin/nice', '-n', '19', '/usr/bin/ionice', '-c', '3',
> > '/usr/bin/qemu-img', 'convert', '-p', '-t', 'none', '-T', 'none',
> > '-f',
> > 'raw', u'/rhev/data-center/mnt/glusterSD/vbgsan02:_fs02/0924ff77-
> > ef51-
> > 43
> > 5b-b90d-50bfbf2e8de7/images/750f4184-b852-4b00-94fc-
> > 476f3f5b93c7/3fe43487-3302-4b34-865a-07c5c6aedbf2', '-O', 'raw',
> > u'/rhev/data-center/mnt/glusterSD/10.137.30.105:_fs03/5d47a297-
> > a21f-
> > 4587-bb7c-dd00d52010d5/images/750f4184-b852-4b00-94fc-
> > 476f3f5b93c7/3fe43487-3302-4b34-865
> > a-07c5c6aedbf2'], ecode=1, stdout=, stderr=qemu-img: error while
> > reading sector 12197886: No data available
> > , message=None
> > 
> > 
> > The storage domains are all based on gluster. The storage domains
> > that
> > we see this on is configured as dispersed volumes. 
> > 
> > Found a way to "fix" the problem. And that is to run dd if=/dev/vda
> > of=/dev/null bs=1M  inside the virtual guest. After that we can
> > copy an
> > image or use storage livemigration.
> > 
> > Is this a gluster problem or an vdsm problem? Or could it be
> > something
> > with qemu-img?
> > 
> > /Johan
> > _______________________________________________
> > Users mailing list
> > Users at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> > 
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