[ovirt-users] hot plug memory in el7

[Michal Skrivanek]

> On 09 Dec 2015, at 14:54, Nathanaël Blanchet <blanchet at abes.fr> wrote:
> 
> 
> 
> Le 08/12/2015 11:43, Michal Skrivanek a écrit :
>> 
>> 
>> On 08 Dec 2015, at 11:20, Yaniv Dary < <mailto:ydary at redhat.com>ydary at redhat.com <mailto: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 < <mailto:blanchet at abes.fr>blanchet at abes.fr <mailto:blanchet at abes.fr>> wrote:
>>> Hi all,
>>> 
>>> I may miss something but according to  <http://www.ovirt.org/Features/Hot_Plug_Memory>http://www.ovirt.org/Features/Hot_Plug_Memory <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 <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? 
Or how/when did you create it?

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
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> 
> -- 
> Nathanaël Blanchet
> 
> Supervision réseau
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> blanchet at abes.fr <mailto:blanchet at abes.fr> 

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