Openstack 虚拟机 CPU类型不匹配导致虚拟机创建启动慢的问题

Openstack以qcow2为镜像创建实例，实例的CPU类型自动分配为EYPC，但是查看计算节点CPU类型为Inter，因此在nova配置中设置计算节点的cpu_mode
[libvirt]
virt_type=kvm
cpu_mode=host-model

以下引入Openstack官网的配置信息描述：
virt_type = kvm

(StrOpt) Libvirt domain type
(valid options are: kvm, lxc, qemu, uml, xen and parallels)
cpu_mode = None

(StrOpt) Set to “host-model” to clone the host CPU feature flags;
to “host-passthrough” to use the host CPU model exactly;
to “custom” to use a named CPU model;
to “none” to not set any CPU model.
If virt_type=”kvm|qemu”, it will default to “host-model”,
otherwise it will default to “none”
cpu_model = None

(StrOpt) Set to a named libvirt CPU model
(see names listed in /usr/share/libvirt/cpu_map.xml).
Only has effect if cpu_mode=”custom” and virt_type=”kvm|qemu”