<div dir="auto">Part of the issue here is that the CentOS team told us yesterday they were having technical difficulties signing and releasing the new 2.6.0 packages to the public mirrors.<div dir="auto"><br></div><div dir="auto">Yesterday around 6:30PM UTC they gave us an approximate ETA of 5 hours. I see this morning that it still seems problematic and I pinged them in order to let them know.</div><div dir="auto"><br><div dir="auto">We've definitely also seen glimpses of issues related to running qemu-kvm <2.6.0 paired with CentOS 7.3 so thanks for the clarifications.</div><div dir="auto"><br><div data-smartmail="gmail_signature" dir="auto">David Moreau Simard<br>Senior Software Engineer | Openstack RDO<br><br>dmsimard = [irc, github, twitter]</div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Dec 13, 2016 11:06 PM, "Steve Gordon" <<a href="mailto:sgordon@redhat.com" target="_blank">sgordon@redhat.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">----- Original Message -----<br>
> From: "David Moreau Simard" <<a href="mailto:dms@redhat.com">dms@redhat.com</a>><br>
> To: "OpenStack Development Mailing List (not for usage questions)" <<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.<wbr>openstack.org</a>>, "OpenStack<br>
> Operators" <<a href="mailto:openstack-operators@lists.openstack.org">openstack-operators@lists.<wbr>openstack.org</a>><br>
> Sent: Tuesday, December 13, 2016 6:13:12 PM<br>
> Subject: [Openstack-operators] [all] Known issue with CentOS 7.3 and  qemu-kvm(-ev) 2.6.0<br>
><br>
> Hi,<br>
><br>
> CentOS 7.3 was released yesterday and a newer version of qemu-kvm-ev<br>
> was shipped as part of this release if you have the CentOS<br>
> Virtualization SIG repositories enabled.<br>
<br>
Isn't the issue that the newer version of qemu-kvm-ev (2.6.0) *hasn't* shipped yet? E.g. it's not in:<br>
<br>
    <a href="http://mirror.centos.org/centos/7/virt/x86_64/kvm-common/" rel="noreferrer" target="_blank">http://mirror.centos.org/<wbr>centos/7/virt/x86_64/kvm-<wbr>common/</a><br>
<br>
Hence the mismatch is created because the CentOS repos contain Libvirt 2.0.0 but not a matching qemu-kvm-ev build (yet).<br>
<br>
Thanks,<br>
<br>
Steve<br>
<br>
> If you're using RDO >= Newton, you will have this repository enabled.<br>
> It was not yet enforced in the Mitaka release so you might or might<br>
> not have it, depending on your deployment.<br>
> Older releases of OpenStack may also be affected but they are not<br>
> proactively tested anymore due to EOL.<br>
><br>
> There is currently a known issue when using the following<br>
> configuration in nova for compute:<br>
> ==<br>
> virt_type=qemu<br>
> cpu_mode=host-model<br>
> ==<br>
><br>
> This combination will yield in failed attempts at creating instances<br>
> and you will see errors like these in nova-compute.log [1] or the<br>
> libvirt logs [2].<br>
> The problem boils down to libvirt trying to pass a cpu extension that<br>
> is unknown to qemu:<br>
> ==<br>
> qemu-kvm: CPU feature arat not found<br>
> ==<br>
><br>
> There is a bugzilla [3] for this issue but in the meantime users are<br>
> encouraged to work around the issue by setting "cpu_mode=none" if they<br>
> are using the qemu (not KVM) hypervisor.<br>
> Please note that Nova defaults the 'cpu_mode' parameter to<br>
> 'host-model' [4] if 'cpu_mode' is not explicitely configured and<br>
> 'virt_type' is 'qemu' so if you're running into this issue, you will<br>
> need to explicitely configure it.<br>
><br>
> [1]:<br>
> <a href="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" rel="noreferrer" target="_blank">http://logs.openstack.org/76/<wbr>409476/4/check/gate-puppet-<wbr>openstack-integration-4-<wbr>scenario003-tempest-centos-7/<wbr>8881991/logs/nova/nova-<wbr>compute.txt.gz#_2016-12-13_16_<wbr>39_50_832</a><br>
> [2]:<br>
> <a href="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" rel="noreferrer" target="_blank">http://logs.openstack.org/76/<wbr>409476/4/check/gate-puppet-<wbr>openstack-integration-4-<wbr>scenario003-tempest-centos-7/<wbr>8881991/logs/libvirt/qemu/<wbr>instance-00000001.txt.gz</a><br>
> [3]: <a href="https://bugzilla.redhat.com/show_bug.cgi?id=1371617" rel="noreferrer" target="_blank">https://bugzilla.redhat.com/<wbr>show_bug.cgi?id=1371617</a><br>
> [4]:<br>
> <a href="http://git.openstack.org/cgit/openstack/nova/tree/nova/virt/libvirt/driver.py?id=146b27f22327f8d60c1017c22ccf18d0e16f1eb7#n3411" rel="noreferrer" target="_blank">http://git.openstack.org/cgit/<wbr>openstack/nova/tree/nova/virt/<wbr>libvirt/driver.py?id=<wbr>146b27f22327f8d60c1017c22ccf18<wbr>d0e16f1eb7#n3411</a><br>
><br>
> David Moreau Simard<br>
> Senior Software Engineer | Openstack RDO<br>
><br>
> dmsimard = [irc, github, twitter]<br>
><br>
> ______________________________<wbr>_________________<br>
> OpenStack-operators mailing list<br>
> <a href="mailto:OpenStack-operators@lists.openstack.org">OpenStack-operators@lists.<wbr>openstack.org</a><br>
> <a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators" rel="noreferrer" target="_blank">http://lists.openstack.org/<wbr>cgi-bin/mailman/listinfo/<wbr>openstack-operators</a><br>
><br>
<br>
</blockquote></div></div>