[ovirt-users] hot plug memory in el7

[Nathanaël Blanchet]

Le 09/12/2015 18:00, Michal Skrivanek a écrit :
>
>> On 09 Dec 2015, at 17:54, Nathanaël Blanchet <blanchet at abes.fr 
>> <mailto:blanchet at abes.fr>> wrote:
>>
>>
>>
>> Le 09/12/2015 17:12, Michal Skrivanek a écrit :
>>>
>>>> On 09 Dec 2015, at 14:54, Nathanaël Blanchet <blanchet at abes.fr 
>>>> <mailto:blanchet at abes.fr>> wrote:
>>>>
>>>>
>>>>
>>>> Le 08/12/2015 11:43, Michal Skrivanek a écrit :
>>>>>
>>>>>
>>>>> On 08 Dec 2015, at 11:20, Yaniv Dary <ydary at redhat.com> wrote:
>>>>>
>>>>>>
>>>>>>
>>>>>> Yaniv Dary Technical Product Manager Red Hat Israel Ltd. 34 
>>>>>> Jerusalem Road Building A, 4th floor Ra'anana, Israel 4350109 Tel 
>>>>>> : +972 (9) 7692306 8272306 Email: ydary at redhat.com 
>>>>>> <mailto:ydary at redhat.com> IRC : ydary
>>>>>>
>>>>>> On Tue, Dec 8, 2015 at 2:03 AM, Nathanaël Blanchet 
>>>>>> <blanchet at abes.fr> wrote:
>>>>>>
>>>>>>     Hi all,
>>>>>>
>>>>>>     I may miss something but according to
>>>>>>     http://www.ovirt.org/Features/Hot_Plug_Memory, ovirt 3.6 was
>>>>>>     supposed to support the hot plug memory feature. Nothing
>>>>>>     happens in reality when increasing memory on a running vm
>>>>>>     with centos7.
>>>>>>     I found this :
>>>>>>     http://lists.ovirt.orgpipermail/kimchi-devel/2015-June/010714.html,
>>>>>>     and it seems that el7.1 can't support the feature because of
>>>>>>     its libvirt version (1.2.8) while the required one is 1.2.14.
>>>>>>     I didn't test, but I guess F22 supports it.
>>>>>>     Is there any chance that el7.2 would support it with a
>>>>>>     backported libvirtd?
>>>>>>
>>>>>>
>>>>>> It does support it, but only hot-plug not hot-unplug.
>>>>>>
>>>>>>     Or will a dedicated libvirt rhev package be released so as
>>>>>>     the downstream to support it (like qemu-kvm for live snapshot
>>>>>>     some time ago)?
>>>>>>     Documentation and limitation of the libvirt version for hot
>>>>>>     plug memory are difficult to find in the ovirt wiki and more
>>>>>>     generally on the web.
>>>>>>     Maybe the feature has been postponed to a 3.6.z release?
>>>>>>
>>>>>>
>>>>>> I works with fedora and you can use it currently with this feature.
>>>>>
>>>>> It works on centos too, qemu-kvm-ev 2.3 we distribute in ovirt repo
>>>> Hello, no qemu-kvm-ev 2.3 is not enough:
>>>> [root at fuji ~]# qemu-img --version
>>>> qemu-img version 2.3.0 (qemu-kvm-ev-2.3.0-29.1.el7), Copyright (c) 
>>>> 2004-2008 Fabrice Bellard
>>>> and
>>>> vdsm-4.17.10.1-0.el7.centos.noarch
>>>>
>>>> I get this error message each time I try to hot add memory :
>>>> Dec  9 11:18:00 fuji journal: unsupported configuration: unknown 
>>>> device type ‘memory'
>>>
>>> was the VM started in a 3.6 cluster?
>> sure, on a full 3.6 cluster. I stopped/restarted them. I restarted 
>> vdsmd and libvirtd
>
> ok..and just for the sake of completeness - what is libvirt version 
> exactly? If you’re running <1.2.14 then your initial comment make a 
> lot of sense….
> Yes, el7.2 has the right one (1.2.17) but even on 7.1 it should 
> support it and if it doesn’t it’s our problem we should fix in ovirt 
> (similarly as we solve qemu by shipping it ourselves)
libvirt-daemon-1.2.8-16.el7_1.5.x86_64
I'm really surprised that such a waited feature has not been yet tested 
by the community users with el7, so that nobody has reported the issue yet.
>
>>> Or how/when did you create it?
>> those vms have been created before uprading to 3.6, some of them from 
>> a blank template, other one based on a el7 template.
>>>
>>> Thanks,
>>> michal
>>>
>>>>
>>>> I tried to restart vdsmd but it is the same, even on other hosts.
>>>>
>>>> any help will be appreciated, thank you.
>>>>>
>>>>>>     Thank you for your help
>>>>>>     _______________________________________________
>>>>>>     Users mailing list
>>>>>>     Users at ovirt.org <mailto:Users at ovirt.org>
>>>>>>     http://lists.ovirt.org/mailman/listinfo/users
>>>>>>
>>>>>>
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>>>>
>>>> -- 
>>>> Nathanaël Blanchet
>>>>
>>>> Supervision réseau
>>>> Pôle Infrastrutures Informatiques
>>>> 227 avenue Professeur-Jean-Louis-Viala
>>>> 34193 MONTPELLIER CEDEX 5 	
>>>> Tél. 33 (0)4 67 54 84 55
>>>> Fax  33 (0)4 67 54 84 14
>>>> blanchet at abes.fr  
>>>
>>
>> -- 
>> Nathanaël Blanchet
>>
>> Supervision réseau
>> Pôle Infrastrutures Informatiques
>> 227 avenue Professeur-Jean-Louis-Viala
>> 34193 MONTPELLIER CEDEX 5 	
>> Tél. 33 (0)4 67 54 84 55
>> Fax  33 (0)4 67 54 84 14
>> blanchet at abes.fr  
>

-- 
Nathanaël Blanchet

Supervision réseau
Pôle Infrastrutures Informatiques
227 avenue Professeur-Jean-Louis-Viala
34193 MONTPELLIER CEDEX 5 	
Tél. 33 (0)4 67 54 84 55
Fax  33 (0)4 67 54 84 14
blanchet at abes.fr

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