我目前正在 AWS EC2 服务器上运行 Openstack 以进行测试/学习，特别是配备高频 Intel Xeon E5-2670（Sandy Bridge）处理器的 m3 版本。
每当我启动实例时，我都会在 /var/log/nova/nova-compute.log 中收到此错误
libvirtError: unsupported configuration: CPU specification not supported by hypervisor
该错误很容易解释，我发现这些链接指向一个可能的解决方案：
https://wiki.openstack.org/wiki/LibvirtXMLCPUModel
https://www.berrange.com/posts/2010/02/15/guest-cpu-model-configuration-in-libvirt-with-qemukvm/
我一直在通过（有根据的）反复试验来解决这个问题，但迄今为止还没有成功，恐怕我只是错过了一些显而易见的东西。
我走的路对吗？有没有在 AWS 上运行过 Openstack 的人能分享一些见解？
编辑
在我的日志文件中发现这个，
2014-04-30 01:56:05.986 1145 ERROR nova.virt.libvirt.driver [req-be5f0c96-cdd7-4ac3-a526-24c77b76a121 4e1ab5ced4394c309396f4487f58c187 b51412721c1045bd93d6dd5e513a4bca] An error occurred while trying to launch a defined domain with xml: <domain type='qemu'>
<name>instance-00000001</name>
<uuid>4b5edb76-7e09-425f-a71f-5c7b48fe2ac7</uuid>
<memory unit='KiB'>524288</memory>
<currentMemory unit='KiB'>524288</currentMemory>
<vcpu placement='static'>1</vcpu>
<sysinfo type='smbios'>
<system>
<entry name='manufacturer'>OpenStack Foundation</entry>
<entry name='product'>OpenStack Nova</entry>
<entry name='version'>2013.2.2</entry>
<entry name='serial'>4aeceff8-3582-48be-8712-ac2febc819c3</entry>
<entry name='uuid'>4b5edb76-7e09-425f-a71f-5c7b48fe2ac7</entry>
</system>
</sysinfo>
<os>
<type arch='x86_64' machine='pc-i440fx-1.5'>hvm</type>
<boot dev='hd'/>
<smbios mode='sysinfo'/>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-model'>
<model fallback='allow'/>
</cpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source file='/var/lib/nova/instances/4b5edb76-7e09-425f-a71f-5c7b48fe2ac7/disk'/>
<target dev='vda' bus='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>
<controller type='usb' index='0'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<interface type='bridge'>
<mac address='fa:16:3e:0b:9b:b8'/>
<source bridge='br100'/>
<model type='virtio'/>
<driver name='qemu'/>
<filterref filter='nova-instance-instance-00000001-fa163e0b9bb8'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<serial type='file'>
<source path='/var/lib/nova/instances/4b5edb76-7e09-425f-a71f-5c7b48fe2ac7/console.log'/>
<target port='0'/>
</serial>
<serial type='pty'>
<target port='1'/>
</serial>
<console type='file'>
<source path='/var/lib/nova/instances/4b5edb76-7e09-425f-a71f-5c7b48fe2ac7/console.log'/>
<target type='serial' port='0'/>
</console>
<input type='tablet' bus='usb'/>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='-1' autoport='yes' listen='localhost' keymap='en-us'>
<listen type='address' address='localhost'/>
</graphics>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
</memballoon>
</devices>
</domain>
2014-04-30 01:56:05.987 1145 ERROR nova.compute.manager [req-be5f0c96-cdd7-4ac3-a526-24c77b76a121 4e1ab5ced4394c309396f4487f58c187 b51412721c1045bd93d6dd5e513a4bca] [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] Instance failed to spawn
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] Traceback (most recent call last):
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1423, in _spawn
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] block_device_info)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2091, in spawn
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] block_device_info, context=context)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 3249, in _create_domain_and_network
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] domain = self._create_domain(xml, instance=instance, power_on=power_on)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 3192, in _create_domain
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] domain.XMLDesc(0))
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 3187, in _create_domain
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] domain.createWithFlags(launch_flags)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 179, in doit
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] result = proxy_call(self._autowrap, f, *args, **kwargs)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 139, in proxy_call
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] rv = execute(f,*args,**kwargs)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/eventlet/tpool.py", line 77, in tworker
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] rv = meth(*args,**kwargs)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] File "/usr/lib/python2.7/dist-packages/libvirt.py", line 728, in createWithFlags
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] if ret == -1: raise libvirtError ('virDomainCreateWithFlags() failed', dom=self)
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] libvirtError: unsupported configuration: CPU specification not supported by hypervisor
2014-04-30 01:56:05.987 1145 TRACE nova.compute.manager [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7]
2014-04-30 01:56:06.950 1145 ERROR nova.compute.manager [req-be5f0c96-cdd7-4ac3-a526-24c77b76a121 4e1ab5ced4394c309396f4487f58c187 b51412721c1045bd93d6dd5e513a4bca] [instance: 4b5edb76-7e09-425f-a71f-5c7b48fe2ac7] Error: unsupported configuration: CPU specification not supported by hypervisor
答案1
看来我误读了资源关于已知问题，第一次就发布了声明。声明如下：
libvirt_cpu_mode 选项的默认值为“host-model”，但如果您在虚拟机内运行 Nova，这显然会导致“不支持的配置：虚拟机管理程序不支持 CPU 规格”之类的错误；对于此类部署，应使用 libvirt_cpu_mode="none" http://wiki.openstack.org/LibvirtXMLCPUModel
因此，如果你遇到此问题，请务必指定
libvirt_cpu_mode="none"
在/etc/nova/nova.conf中
答案2
正如 Jack 所建议的，我认为您正在尝试托管 KVM 盒而不是 qemu。AWS 不支持 KVM，因此您需要切换到 qemu。请查看第 7 点http://docs.openstack.org/trunk/install-guide/install/apt/content/nova-compute.html
摘自指南：如果您出于测试目的在虚拟机上安装 Compute，则必须使用以下命令确定虚拟机管理程序和/或 CPU 是否支持嵌套硬件加速：
egrep -c '(vmx|svm)' /proc/cpuinfo
如果此命令返回一或更大的值，则您的虚拟机管理程序和/或 CPU 支持嵌套硬件加速，无需额外配置。
如果此命令返回零值，则表示您的虚拟机管理程序和/或 CPU 不支持嵌套硬件加速，并且 libvirt 必须使用 QEMU 而不是 KVM。编辑 /etc/nova/nova-compute.conf 文件中的 [libvirt] 部分以修改此键：
[libvirt]
...
virt_type = qemu