[one-users] VM running on multiple hosts

[Jaime Melis]

As far as I know, the shared_lvm hasn't been updated lately:
- https://github.com/OpenNebula/addon-shared-lvm-single-lock
- http://community.opennebula.org/shared_lvm


On Fri, Jun 27, 2014 at 9:40 PM, Miloš Kozák <milos.kozak at lejmr.com> wrote:

> Hi,
>
> it is great to know, is it related to the improved monitoring in ONE? I am
> getting ready for trials of ONE 4.6.
>
> We are using shared_lvm driver, so I would like to know if the new LVM
> driver is compatible with it? Or I can expect some major issues? I havent
> had enough time to check..
>
> Thanks Milos
>
>
> Dne 14-06-27 12:18 PM, Tino Vazquez napsal(a):
>
>  Hi,
>>
>> Issues with delete and shutdown have been greatly improved in
>> OpenNebula 4.4+, I would recommend upgrading as far as possible.
>>
>> Best,
>>
>> -Tino
>>
>> --
>> OpenNebula - Flexible Enterprise Cloud Made Simple
>>
>> --
>> Constantino Vázquez Blanco, PhD, MSc
>> Senior Infrastructure Architect at C12G Labs
>> www.c12g.com | @C12G | es.linkedin.com/in/tinova
>>
>> --
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>>
>> On 26 June 2014 16:42, Steven Timm <timm at fnal.gov> wrote:
>>
>>> We have also seen this behavior in OpenNebula 3.2.
>>> It appears that the failure mode occurs because the onevm delete
>>> (or shutdown or migrate) doesn't correctly verify that the virtual
>>> machine
>>> has gone away.
>>> It sends the acpi terminate signal to the virtual machine
>>> but if that fails, the VM will keep running.  There is no
>>> signal sent to libvirt to kill the machine regardless.
>>> OpenNebula
>>> deletes the disk.0 from underneath it but that doesn't stop
>>> the vm from running, it stays running on the deleted file handle.
>>>
>>> On the plus side, I once was able to recover the full disk image
>>> of a VM that shouldn't have been deleted, that way, by going
>>> to the /proc file system and dd'ing from the still-open file
>>> handle of the process.
>>>
>>> We've written a set of utilities to check the consistency
>>> of the leases database with what is actually running on the cloud,
>>> and alert us if there are any differences.
>>>
>>> Steve Timm
>>>
>>>
>>>
>>> On Thu, 26 Jun 2014, Milos Kozak wrote:
>>>
>>>  Hi, I would like to add that I have experienced it few times with ONE
>>>> 3.8..
>>>>
>>>> On 6/26/2014 9:34 AM, Robert Tanase wrote:
>>>>
>>>>>       Hi all,
>>>>>
>>>>>       We are using Opennebula 4.2 system with several hosts ( KVM +
>>>>>       network storage) .
>>>>>
>>>>>       Recently we have discovered, by having disk r/w issues on a VM,
>>>>> that
>>>>>       after a delete - recreate action, specific VM is running on two
>>>>>       different hosts: the old placement host and the new placement
>>>>> host.
>>>>>
>>>>>       We are using the hooks system for host failure and a cron job at
>>>>> 5
>>>>>       minutes which is (re)deploying pending machines on available
>>>>> running
>>>>>       hosts.
>>>>>
>>>>>       By checking oned log files we couldn't find any abnormal behavior
>>>>>       and we are stuck.
>>>>>
>>>>>       Please guide us to find the root cause of this issue if is
>>>>> possible.
>>>>>
>>>>>       --
>>>>>       Thank you,
>>>>>       Robert Tanase
>>>>>
>>>>>
>>>>>
>>>>>   _______________________________________________
>>>>>   Users mailing list
>>>>>   Users at lists.opennebula.org
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>>>>>
>>>>>  _______________________________________________
>>>> Users mailing list
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>>>>
>>>>
>>>>  ------------------------------------------------------------------
>>> Steven C. Timm, Ph.D  (630) 840-8525
>>> timm at fnal.gov  http://home.fnal.gov/~timm/
>>> Fermilab Scientific Computing Division, Scientific Computing Services
>>> Quad.
>>> Grid and Cloud Services Dept., Associate Dept. Head for Cloud Computing
>>>
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>>
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-- 
Jaime Melis
Project Engineer
OpenNebula - Flexible Enterprise Cloud Made Simple
www.OpenNebula.org | jmelis at opennebula.org
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