[one-users] Shutting down a VM from within the VM

[Simon Boulet]

Hi,

Here our driver reports the state as returned by Libvirt [1], which
reports VM terminated from the inside (shutdown) as Paused. When the
OpenNebula driver sees a VM as being reported as paused [2], it
switches the VM to SUSPENDED state in OpenNebula. Then you can restart
the VM by issuing the resume action [3].

So, I think OpenNebula has the building blocks for that, but I'm just
unsure how it is implemented in the different OpenNebula drivers.

[1] http://wiki.libvirt.org/page/VM_lifecycle#States_that_a_guest_domain_can_be_in
[2] http://opennebula.org/documentation:rel4.2:devel-vmm#poll_information
[3] http://opennebula.org/documentation:rel4.2:api#onevmaction

Simon

On Fri, Oct 4, 2013 at 9:43 AM, Parag Mhashilkar <parag at fnal.gov> wrote:
> Hi Sharuzzaman,
>
> Thanks for your response. I am aware of the fact that OpenNebula requires human intervention when shutdown is issued from inside the VM. We can write scripts to do lot of things, but when in the business of resource provisioning, the resource provider does not necessarily control what runs in the VM, application that launches them and for obvious reasons I am not giving any access to ONE's database to the users. So these alternatives seem merely hacks rather than a much cleaner solution from the service.
>
> Such a feature is useful from a infrastructure provider's point of view. If AWS has done it (and Openstack I think) then there be a way out.
>
> -Parag
>
>
> On Oct 3, 2013, at 9:27 PM, Sharuzzaman Ahmat Raslan wrote:
>
>> Hi Parag,
>>
>> I believe OpenNebula need to have human intervention to really determine whether to remove or not the VM that it has deployed.
>>
>> I also think that you can write a script that signal or call OpenNebula command as soon as the task finish, to shutdown the VM. Or if direct calling command not possible, maybe your application can write some status in a database, and a script in OpenNebula read that status and make decision from it.
>>
>> Thanks.
>>
>>
>> On Thu, Oct 3, 2013 at 11:38 PM, Parag Mhashilkar <parag at fnal.gov> wrote:
>> Hi,
>>
>> Does OpenNebula EC2 interface support shutting down a VM from with in the VM itself and have the scheduler recognize that VM has been stopped/shutdown? How do we enable this feature? At Fermi, we have OpenNebula v3.2 and when the VM is shutdown it stays in the UNKNOWN state. Can OpenNebula get this ACPI shutdown info from virsh and handle the situation more gracefully rather than putting the VM in UKNOWN state?
>>
>> Here is an example why I think something like this is useful:
>>
>> When VMs are launched to perform certain tasks (classical equivalent of batch nodes), only the processes running in the VM know when the task is done and can shutdown the VM freeing up the resources. Running VM past the task life is wasted resources and controlling the lifetime of VM from outside is not always possible.
>>
>> In case of AWS, it supports following which is very good feature to have when controlling the VMs in above scenario.
>> ec2-run-instaces --instance-initiated-shutdown-behavior <stop|terminate>
>>
>> How do we achieve this with Opennebula?
>>
>> Thanks & Regards
>> +==========================================================
>> | Parag Mhashilkar
>> | Fermi National Accelerator Laboratory, MS 120
>> | Wilson & Kirk Road, Batavia, IL - 60510
>> |----------------------------------------------------------
>> | Phone: 1 (630) 840-6530 Fax: 1 (630) 840-2783
>> |----------------------------------------------------------
>> | Wilson Hall, 806E (Nov 8, 2012 - To date)
>> | Wilson Hall, 867E (Nov 17, 2010 - Nov 7, 2012)
>> | Wilson Hall, 863E (Apr 24, 2007 - Nov 16, 2010)
>> | Wilson Hall, 856E (Mar 21, 2005 - Apr 23, 2007)
>> +==========================================================
>>
>>
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>>
>>
>>
>> --
>> Sharuzzaman Ahmat Raslan
>
>
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