Open Stack

----- Original Message -----
> From: "George Zhao" <george at hd.net.nz>
> To: "Steve Gordon" <sgordon at redhat.com>
> Cc: openstack-operators at lists.openstack.org
> Sent: Wednesday, December 14, 2016 3:01:11 PM
> Subject: Re: [Openstack-operators] [all] Known issue with CentOS 7.3 and qemu-kvm(-ev) 2.6.0
> 
> I'm using kvm, just temporally changed to host-passthrough, waiting on
> qemu-kvm-ev-2.6

Looks like it's up now, I see qemu-kvm-ev-2.6.0-27.1.el7.x86_64.rpm and friends in:

http://mirror.centos.org/centos/7/virt/x86_64/kvm-common/

Thanks,

Steve

> On 12/14/2016 05:22 PM, Steve Gordon wrote:
> > ----- 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
> >>>
> >>
> >> _______________________________________________
> >> OpenStack-operators mailing list
> >> OpenStack-operators at lists.openstack.org
> >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
> >>
> >
> 

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