[one-users] "force" deploy of VM

[Mario Benincasa]

Ok, thanks for clarifying.
I'll already had a look at the script. I believe I can manage.
I'll let you know in case of problems, anyway :-)

Thanks a lot.

      Mario



On Wed, Mar 19, 2014 at 3:08 PM, Carlos Martín Sánchez <
cmartin at opennebula.org> wrote:

> Hi,
>
> On Wed, Mar 19, 2014 at 1:06 PM, Mario Benincasa <mbeninca at gmail.com>wrote:
>
>> Thanks Carlos for your answer.
>>
>> About your suggestion, do you mean calling the fault tolerance script
>> (host_error.rb) with the "-f" option?
>> Or some more tweaking?
>> Because the comments in the oned.conf file say "force resubmission of
>> suspended VMs".
>> In my case VMs are not in suspended state, but in pending state.
>> Resubmission means redeploy, i.e. new VM id allocated?
>>
>> Thanks
>>
>>     Mario
>>
>
> I was suggesting to modify the script, and perform the onevm deploy just
> after the vm.delete(true) call.
> The hook is a simple ruby script (host_error.rb), it shouldn't be too
> difficult. But if are not familiar with the ruby API, you can also create
> another bash script to perform the deployment, and then call that one from
> the host_error.rb hook.
>
> Let us know if you run into any problems.
>
> Regards
> --
> Carlos Martín, MSc
> Project Engineer
> OpenNebula - Flexible Enterprise Cloud Made Simple
> www.OpenNebula.org <http://www.opennebula.org/> | cmartin at opennebula.org
>  | @OpenNebula <http://twitter.com/opennebula> <cmartin at opennebula.org>
>
>
>
>>
>> On Wed, Mar 19, 2014 at 11:58 AM, Carlos Martín Sánchez <
>> cmartin at opennebula.org> wrote:
>>
>>> Hi,
>>>
>>>  On Tue, Mar 18, 2014 at 10:18 AM, Mario Benincasa <mbeninca at gmail.com>wrote:
>>>
>>>> Hi all
>>>>
>>>> I have a simple question (well I believe it is simple :-) )
>>>> I searched through documentation and mailing list archive, but I wasn't
>>>> able to find anything.
>>>> Apologies if the question has already been answered somewhere.
>>>>
>>>> After template instantiation, the VM is placed in pending state until
>>>> the scheduler decides to run it.
>>>> If there are not enough resources, it will remain in pending state.
>>>> "onevm deploy" will anyway run it, even in case of not enough
>>>> resources.
>>>>
>>>> My question is: is it possible to automatically have the deploy of the
>>>> VM, even if the scheduler would leave it in pending state?
>>>>
>>>> I need this for the fault tolerance script: I have two nodes, each
>>>> running a certain number of VMs. In case a node crashes, I want the VMs to
>>>> be deployed in the surviving node, even if the scheduler disagrees.
>>>> Currently, the VMs are left in pending state, thus they are not
>>>> recovering the service. Of course a manual "onevm deploy" would recover,
>>>> but I would like to have it automatically :-)
>>>> The impacted resource appears to be the RAM: the sum of the VMs' RAM
>>>> allocation exceeds the physical RAM, but in real operating conditions the
>>>> RAM usage is quite under the allocated RAM, and thus I expect no problem in
>>>> such an over provisioning.
>>>>
>>>> Thanks for any hint.
>>>>
>>>>    Mario
>>>>
>>>
>>> We don't have any way to tell the scheduler to ignore the VM
>>> requirements, and I think it would be a problematic feature. Memory
>>> overcommitment (up to a certain amount) may not have a noticeable impact,
>>> but a full disk will certainly do.
>>>
>>> I think your best option is to have the fault tolerance script do the
>>> forced deploy.
>>>
>>> Regards
>>> --
>>> Carlos Martín, MSc
>>> Project Engineer
>>> OpenNebula - Flexible Enterprise Cloud Made Simple
>>> www.OpenNebula.org <http://www.opennebula.org/> | cmartin at opennebula.org
>>>  | @OpenNebula <http://twitter.com/opennebula> <cmartin at opennebula.org>
>>>
>>>
>>>
>>>
>>
>>
>> --
>> Mario Benincasa
>> Via del Conservatorio 55
>> 00186 Roma - Italy
>> tel.   +39 066872917
>> mob.   +39 3346210331
>> fax:   +39 0697656510
>> email: mbeninca at gmail.com
>>
>>
>


-- 
Mario Benincasa
Via del Conservatorio 55
00186 Roma - Italy
tel.   +39 066872917
mob.   +39 3346210331
fax:   +39 0697656510
email: mbeninca at gmail.com
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