[one-users] wrong restart -> delete disk image!

Thu Sep 8 10:33:20 PDT 2011

Hi Carlos and Samuel,

I already had came across with this issue. In my case I tested the front-end
and the physical host in the same machine, and if for some reason I reboot
the host, when it comes back up VMs are in state Unknown (and don’t leave
that state). Then, when I try to restart it with OpenNebula it does this
magic thing, deletes the VM J But if I backup the xml of the VM (in virsh
with a dumpxml), reboot the host and then try to launch the VM with virsh
the VM starts OK, but OpenNebula still sees it as Unknown.

Cheers,

João

From: users-bounces at lists.opennebula.org
[mailto:users-bounces at lists.opennebula.org] On Behalf Of Carlos Martín
Sánchez
Sent: quinta-feira, 8 de Setembro de 2011 15:08
To: samuel
Cc: users
Subject: Re: [one-users] wrong restart -> delete disk image!

Hi Samuel,

It is safe to change the code, just a couple of comments:

Before stopping OpenNebula, check that there are not any VMs in a transient
state (migrating, saving, etc.).
Then stop it, backup /var/lib/one (or $ONE_LOCATION/var), and use the '-k'
option of install.sh to keep your current etc folder.

Also take into account that we haven't tested the proposed solution.

Regards.
--
Carlos Martín, MSc
Project Major Contributor
OpenNebula - The Open Source Toolkit for Cloud Computing
 <http://www.opennebula.org/> www.OpenNebula.org |
<mailto:cmartin at opennebula.org> cmartin at opennebula.org

On Thu, Sep 8, 2011 at 1:32 PM, samuel <samu60 at gmail.com> wrote:

Thank you very much!

Is it safe to manually change the code and just perform a ./install.sh from
the sources on a running installation? I'm using Mysql backend so I expect
that the modification of the sources will only affect the compillation of
the modified library and the rest will continue working ok.

Am I right?

I really appreciate the fast response.

Samuel Osorio.

On 8 September 2011 12:20, Ruben S. Montero <rubensm at dacya.ucm.es> wrote:

Hi,

Yes you are right. There is an issue open [1]. We are planning to
apply the proposed solution in that issue for 3.0 (i.e. clean-up will
happen only when you issue a delete operation). I think this will
address your use-case.

[1] http://dev.opennebula.org/issues/265

Thanks

Ruben

On Tue, Sep 6, 2011 at 5:28 PM, samuel <samu60 at gmail.com> wrote:
> Hi folks,
>
> Recently there was a network problem and one instance became unreachable.
We
> tried to restart it with stop and resume actions but there's been a
problem
> and the disk has been deleted. The main concern is why, after trying to
> restart and an error happened, the directory where the disk image resides
> has been deleted? There was no sensible data on it but I just don't get
why
> there has been a rm -rf of the directory.
>
> Details:
>
> The configuration is KVM with shared storage using open nebula 2.2.
>
> output of virsh version
>     Compilado contra la biblioteca: libvir 0.8.8
>     Utilizando la biblioteca: libvir 0.8.8
>     Utilizando API: QEMU 0.8.8
>     Ejecutando hypervisor: QEMU 0.14.0
>
> related logs:
>
> Tue Sep  6 12:37:49 2011 [VMM][D]: Message received: SAVE SUCCESS 22
Domain
> one-22 saved to /srv/cloud/one/var//22/images/checkpoint
> Tue Sep  6 12:37:49 2011 [VMM][D]: Message received:
> Tue Sep  6 12:37:49 2011 [TM][D]: Message received: LOG - 22 tm_mv.sh:
Will
> not move, is not saving image
> Tue Sep  6 12:37:49 2011 [TM][D]: Message received: TRANSFER SUCCESS 22 -
>
> Tue Sep  6 12:38:12 2011 [DiM][D]: Restarting VM 22
> Tue Sep  6 12:38:12 2011 [DiM][E]: Could not restart VM 22, wrong state.
> Tue Sep  6 12:38:12 2011 [ReM][E]: Wrong state to perform action
>
> Tue Sep  6 12:38:18 2011 [ReM][D]: VirtualMachineAction invoked
> Tue Sep  6 12:38:18 2011 [DiM][D]: Resuming VM 22
> Tue Sep  6 12:38:47 2011 [DiM][D]: Deploying VM 22
>
> Tue Sep  6 12:38:47 2011 [ReM][D]: VirtualMachineInfo method invoked
> Tue Sep  6 12:38:47 2011 [TM][D]: Message received: LOG - 22 tm_mv.sh:
Will
> not move, is not saving image
>
> Tue Sep  6 12:38:47 2011 [TM][D]: Message received: TRANSFER SUCCESS 22 -
>
> Tue Sep  6 12:38:48 2011 [ReM][D]: VirtualMachineInfo method invoked
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: LOG - 22 Command
> execution fail: 'if [ -x "/var/tmp/one/vmm/kvm/restore" ]; then
> /var/tmp/one/vmm/kvm/restore /srv/cloud/one/var//22/images/checkpoint;
> else                              exit 42; fi'
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: LOG - 22 STDERR
> follows.
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: LOG - 22 error:
Failed
> to restore domain from /srv/cloud/one/var//22/images/checkpoint
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: LOG - 22 error:
cannot
> close file: Bad file descriptor
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: LOG - 22 ExitCode: 1
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: RESTORE FAILURE 22
> error: Failed to restore domain from
> /srv/cloud/one/var//22/images/checkpoint
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: error: cannot close
> file: Bad file descriptor
> Tue Sep  6 12:38:49 2011 [VMM][D]: Message received: ExitCode: 1
>
> Tue Sep  6 12:38:50 2011 [TM][D]: Message received: LOG - 22 tm_delete.sh:
> Deleting /srv/cloud/one/var//22/images
> Tue Sep  6 12:38:50 2011 [TM][D]: Message received: LOG - 22 tm_delete.sh:
> Executed "rm -rf /srv/cloud/one/var//22/images".
> Tue Sep  6 12:38:50 2011 [TM][D]: Message received: TRANSFER SUCCESS 22 -
>
>
> Thank you in advance for any hint!
> Samuel.
>

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>

--
Dr. Ruben Santiago Montero
Associate Professor (Profesor Titular), Complutense University of Madrid

URL: http://dsa-research.org/doku.php?id=people:ruben
Weblog: http://blog.dsa-research.org/?author=7

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