error: the CPU is incompatible with host CPU: Host CPU does not provide required
error: Failed to start domain centos7.9error: the CPU is incompatible with host CPU: Host CPU does not provide required features: fma, movbe, bmi1, avx2, bmi2, invpcid
处理过程：
(nova-libvirt)# virsh edit centos7.9
Domain centos7.9 XML configuration not changed.
(nova-libvirt)# virsh undefine centos7.9
Domain centos7.9 has been undefined
(nova-libvirt)# virsh list --all
Id Name State
----------------------------------------------------
3 instance-00000059 running
(nova-libvirt)# ls
CentOS-7.9_x86_64.rawcentos7.9.xml
(nova-libvirt)# vi centos7.9.xml
删除cpu的地方
<cpu mode='custom' match='exact'>
<model fallback='allow'>Haswell-noTSX</model>
修改为如下配置：
<cpu mode='host-model'>
<model fallback='allow'/>
重新执行define命令：
(nova-libvirt)# virshlist --all
Id Name State
----------------------------------------------------
3 instance-00000059 running
- centos7.9 shut off
(nova-libvirt)# virshstart centos7.9
Domain centos7.9 started
启动成功。
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