Open Stack

----- Original Message -----
> From: "George Zhao" <george at hd.net.nz>
> To: openstack-operators at lists.openstack.org
> Sent: Tuesday, December 13, 2016 7:44:02 PM
> Subject: Re: [Openstack-operators] [all] Known issue with CentOS 7.3 and qemu-kvm(-ev) 2.6.0
> 
> yup, I have to use cpu_mode=host-passthrough to get vms booting up.

Are you using virt_type="qemu" or virt_type="kvm"? If the later you should be OK to switch back to host-model once the qemu-kvm-ev-2.6.0 build is available.

Thanks,

Steve

> On 12/14/2016 12:13 PM, David Moreau Simard wrote:
> > Hi,
> >
> > CentOS 7.3 was released yesterday and a newer version of qemu-kvm-ev
> > was shipped as part of this release if you have the CentOS
> > Virtualization SIG repositories enabled.
> >
> > If you're using RDO >= Newton, you will have this repository enabled.
> > It was not yet enforced in the Mitaka release so you might or might
> > not have it, depending on your deployment.
> > Older releases of OpenStack may also be affected but they are not
> > proactively tested anymore due to EOL.
> >
> > There is currently a known issue when using the following
> > configuration in nova for compute:
> > ==
> > virt_type=qemu
> > cpu_mode=host-model
> > ==
> >
> > This combination will yield in failed attempts at creating instances
> > and you will see errors like these in nova-compute.log [1] or the
> > libvirt logs [2].
> > The problem boils down to libvirt trying to pass a cpu extension that
> > is unknown to qemu:
> > ==
> > qemu-kvm: CPU feature arat not found
> > ==
> >
> > There is a bugzilla [3] for this issue but in the meantime users are
> > encouraged to work around the issue by setting "cpu_mode=none" if they
> > are using the qemu (not KVM) hypervisor.
> > Please note that Nova defaults the 'cpu_mode' parameter to
> > 'host-model' [4] if 'cpu_mode' is not explicitely configured and
> > 'virt_type' is 'qemu' so if you're running into this issue, you will
> > need to explicitely configure it.
> >
> > [1]:
> > http://logs.openstack.org/76/409476/4/check/gate-puppet-openstack-integration-4-scenario003-tempest-centos-7/8881991/logs/nova/nova-compute.txt.gz#_2016-12-13_16_39_50_832
> > [2]:
> > http://logs.openstack.org/76/409476/4/check/gate-puppet-openstack-integration-4-scenario003-tempest-centos-7/8881991/logs/libvirt/qemu/instance-00000001.txt.gz
> > [3]: https://bugzilla.redhat.com/show_bug.cgi?id=1371617
> > [4]:
> > http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py?id=146b27f22327f8d60c1017c22ccf18d0e16f1eb7#n3411
> >
> > David Moreau Simard
> > Senior Software Engineer | Openstack RDO
> >
> > dmsimard = [irc, github, twitter]
> >
> > _______________________________________________
> > OpenStack-operators mailing list
> > OpenStack-operators at lists.openstack.org
> > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
> >
> 
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> 

-- 
Steve Gordon,
Principal Product Manager,
Red Hat OpenStack Platform