[Openstack-operators] User Survey usage of QEMU (as opposed to KVM) ?
maishsk at maishsk.com
Wed May 11 16:18:42 UTC 2016
Which still brings me back to the original point.
Is this a bug - and should it be reported as such?
On 11/05/16 18:51, Kashyap Chamarthy wrote:
> On Tue, May 03, 2016 at 02:27:00PM -0500, Sergio Cuellar Valdes wrote:
>> I'm confused too about the use of KVM or QEMU In the computes the
>> file/etc/nova/nova-compute.conf has:
>> The output of:
>> nova hypervisor-show <id> | grep hypervisor_type
>> hypervisor_type | QEMU
> As Dan noted in his response, it's because it is reporting the libvirt driver
> name (which is reported as QEMU).
> Refer below if you want to double-confirm if your instances are using KVM.
>> The virsh dumpxml of the instances shows:
>> <domain type='kvm' id='44'>
> That means, yes, you using KVM. You can confirm that by checking your QEMU
> command-line of the Nova instance, you'll see something like "accel=kvm":
> # This is on Fedora 23 system
> $ ps -ef | grep -i qemu-system-x86_64
> [...] /usr/bin/qemu-system-x86_64 -machine accel=kvm [...]
>> But according to this document , it is using QEMU emulator instead of
>> KVM, because it is not using /usr/bin/qemu-kvm
>> So I really don't know if it's using KVM or QEMU.
> As noted above, a sure-fire way to know is to see if the instance's QEMU
> command-line has "accel=kvm".
> A related useful tool is `virt-host-validate` (which is part of libvirt-client
> package, at least on Fedora-based systems):
> $ virt-host-validate | egrep -i 'kvm'
> QEMU: Checking if device /dev/kvm exists : PASS
> QEMU: Checking if device /dev/kvm is accessible : PASS
>>  https://libvirt.org/drvqemu.html
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