[ovirt-users] Going crazy with emory hotplug on 3.6

[Nir Soffer]

Adding Francesco.

On Sun, Feb 21, 2016 at 2:19 PM, Markus Stockhausen
<stockhausen at collogia.de> wrote:
> Hi there,
>
> we upgraded Ovirt to 3.6, added the first Centos 7 host and created a new cluster
> with compatibility level 3.6 around it. Until now we are running with Fedora nodes.
> The first Linux VMs are already running in the new cluster. With the first Windows
> VM migrated over we once again face the old Windows activation problem. The
> system request us to reactivate the Windows license.
>
> To make a long story short: I manually compiled OVirt/Centos qemu 2.3 and enabled
> the old Fedora machine type pc-1.0. Afterwards I had to lower compatibility level
> of the cluster to 3.5 because Ovirt tried to start the old machine type with memory
> hotplug support -> FAIL. Finally everything is up and running.
>
> Conclusion: OVirt always tries to start VMs with memory hotplug in a current 3.6
> cluster. The machine type (e.g. rhel6.6.0) ist not checked and qemu will fail during
> startup with the message: qemu-kvm: "-memory 'slots|maxmem'" is not supported"
> Older post on mailing list: http://lists.ovirt.org/pipermail/users/2016-January/037034.html
>
> Question: What is the desired way to disable the hotplug qemu parametrization
> for single VMs in 3.6 cluster? It MUST be possible otherwise it would not make
> sense to choos older machine types.
>
> Markus
>
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