[ovirt-users] disk not bootable

Sat Jul 16 21:25:08 UTC 2016

Nir,

Ok ill look for it here in a few.
Thanks for your reply and help!

-- 
Fernando Fuentes
ffuentes at txweather.org
http://www.txweather.org

On Sat, Jul 16, 2016, at 04:16 PM, Nir Soffer wrote:
> On Fri, Jul 15, 2016 at 3:50 PM, Fernando Fuentes <ffuentes at darktcp.net>
> wrote:
> > Nir,
> >
> > I try to follow your steps but I cant seem to find the ID of the
> > template.
> 
> The image-uuid of the template is displayed in the Disks tab in engine.
> 
> To find the volume-uuid on block storage, you can do:
> 
> pvscan --cache
> lvs -o vg_name,lv_name,tags | grep image-uuid
> 
> >
> > Regards,
> >
> > --
> > Fernando Fuentes
> > ffuentes at txweather.org
> > http://www.txweather.org
> >
> > On Sun, Jul 10, 2016, at 02:15 PM, Nir Soffer wrote:
> >> On Thu, Jul 7, 2016 at 7:46 PM, Melissa Mesler <melissa at justmelly.com>
> >> wrote:
> >> > All, I did a test for Fernando in our ovirt environment. I created a vm
> >> > called win7melly in the nfs domain. I then migrated it to the iscsi
> >> > domain. It booted without any issue. So it has to be something with the
> >> > templates. I have attached the vdsm log for the host the vm resides on.
> >>
> >> The log show a working vm, so it does not help much.
> >>
> >> I think that the template you copied from the nfs domain to the block
> >> domain is
> >> corrupted, or the volume metadata are incorrect.
> >>
> >> If I understand this correctly, this started when Fernando could not copy
> >> the vm
> >> disk to the block storage, and I guess the issue was that the template
> >> was missing
> >> on that storage domain. I assume that he copied the template to the
> >> block storage
> >> domain by opening the templates tab, selecting the template, and choosing
> >> copy
> >> from the menu.
> >>
> >> Lets compare the template on both nfs and block storage domain.
> >>
> >> 1. Find the template on the nfs storage domain, using the image uuid in
> >> engine.
> >>
> >> It should be at
> >>
> >>     /rhev/data-center/mnt/server:_path/domain-uuid/images/image-uuid/volume-uuid
> >>
> >> 2. Please share the output of:
> >>
> >>     cat /path/to/volume.meta
> >>     qemu-img info /path/to/volume
> >>     qemu-img check /path/to/volume
> >>
> >> 4. Find the template on the block storage domain
> >>
> >> You should have an lv using the same volume uuid and the image-uuid
> >> should be in the lv tag.
> >>
> >> Find it using:
> >>
> >>     lvs -o vg_name,lv_name,tags | grep volume-uuid
> >>
> >> 5. Activate the lv
> >>
> >>     lvchange -ay vg_name/lv_name
> >>
> >> 6. Share the output of
> >>
> >>     qemu-img info /dev/vg_name/lv_name
> >>     qemu-img check /dev/vg_name/lv_name
> >>
> >> 7. Deactivate the lv
> >>
> >>     lvchange -an vg_name/lv_name
> >>
> >> 8. Find the lv metadata
> >>
> >> The metadata is stored in /dev/vg_name/metadata. To find the correct
> >> block,
> >> find the tag named MD_N in the lv tags you found in step 4
> >>
> >> The block we need is located at offset N from start of volume.
> >>
> >> 9. Share the output of:
> >>
> >>     dd if=/dev/vg_name/metadata bs=512 skip=N count=1 iflag=direct
> >>
> >> The output of this command should show the image-uuid.
> >>
> >> Nir
> >>
> >> >
> >> > - MeLLy
> >> >
> >> > On Mon, Jul 4, 2016, at 11:52 PM, Fernando Fuentes wrote:
> >> >> Nir,
> >> >>
> >> >> That's exactly how I did it Nir.
> >> >> I will test tomorrow with a new Windows VM and report back.
> >> >>
> >> >> Regards,
> >> >>
> >> >> --
> >> >> Fernando Fuentes
> >> >> ffuentes at txweather.org
> >> >> http://www.txweather.org
> >> >>
> >> >> On Mon, Jul 4, 2016, at 10:48 AM, Nir Soffer wrote:
> >> >> > On Mon, Jul 4, 2016 at 6:43 PM, Francesco Romani <fromani at redhat.com>
> >> >> > wrote:
> >> >> > > ----- Original Message -----
> >> >> > >> From: "Nir Soffer" <nsoffer at redhat.com>
> >> >> > >> To: "Fernando Fuentes" <ffuentes at darktcp.net>
> >> >> > >> Cc: "Francesco Romani" <fromani at redhat.com>, "users" <users at ovirt.org>
> >> >> > >> Sent: Saturday, July 2, 2016 11:18:01 AM
> >> >> > >> Subject: Re: [ovirt-users] disk not bootable
> >> >> > >>
> >> >> > >> On Sat, Jul 2, 2016 at 1:33 AM, Fernando Fuentes <ffuentes at darktcp.net>
> >> >> > >> wrote:
> >> >> > >> > Nir,
> >> >> > >> >
> >> >> > >> > Ok I ran another test and this one I moved from NFS domain to iSCSI and
> >> >> > >> > stop working than I moved it back and still unable to run... Windows VM
> >> >> > >> > is saying "no available boot disk"
> >> >> > >> > VM: Win7-Test
> >> >> > >> > Host: Zeta
> >> >> > >> > Info as requested:  http://pastebin.com/1fSi3auz
> >> >> > >>
> >> >> > >> We need a working xml to compare to.
> >> >> > >
> >> >> > > [snip expected changes]
> >> >> > >
> >> >> > >
> >> >> > >>   <entry name="manufacturer">oVirt</entry>
> >> >> > >>   <entry name="product">oVirt Node</entry>
> >> >> > >>   <entry name="version">6-5.el6.centos.11.2</entry>
> >> >> > >> - <entry name="serial">C938F077-55E2-3E50-A694-9FCB7661FD89</entry>
> >> >> > >> + <entry name="serial">735C7A01-1F16-3CF0-AF8C-A99823E95AC0</entry>
> >> >> > >>
> >> >> > >> Not expected - maybe this is confusing windows?
> >> >> > >>
> >> >> > >> Francesco, why vm serial has changed after moving disks from one storage
> >> >> > >> domain
> >> >> > >> to another?
> >> >> > >
> >> >> > > We put in serial either
> >> >> > > 1. the UUID Engine send to us
> >> >> > > 2. the host UUID as returned by our getHostUUID utility function
> >> >> > >
> >> >> > > the latter is unlikely to change, even after this disk move.
> >> >> >
> >> >> > Fernando, can you describe exactly how you moved the disk?
> >> >> >
> >> >> > I assume that you selected the vm in the virtual machines tab, then
> >> >> > selected
> >> >> > disks from the sub tab, then selected move, and selected the target
> >> >> > storage domain.
> >> >> >
> >> >> > Also, can you reproduce this with a new vm? (create vm with disk nfs,
> >> >> > stop vm,
> >> >> > move disk to iscsi, start vm).
> >> >> >
> >> >> > > So the first suspect in line is Engine
> >> >> > >
> >> >> > > Arik, do you know if Engine is indeed supposed to change the UUID in this flow?
> >> >> > > That seems very surprising.
> >> >> > >
> >> >> > > Thanks and bests,
> >> >> > >
> >> >> > > --
> >> >> > > Francesco Romani
> >> >> > > RedHat Engineering Virtualization R & D
> >> >> > > Phone: 8261328
> >> >> > > IRC: fromani
> >> >> _______________________________________________
> >> >> Users mailing list
> >> >> Users at ovirt.org
> >> >> http://lists.ovirt.org/mailman/listinfo/users
> >> >
> >> > _______________________________________________
> >> > Users mailing list
> >> > Users at ovirt.org
> >> > http://lists.ovirt.org/mailman/listinfo/users
> >> >