Libvirt：“CPU与主机CPU不兼容”

Question

我正在将一个域从“旧pc”导出到“新pc”

# Export domain (from old pc)
ssh user@"$REMOTE_IP" "virsh --connect qemu:///system suspend --domain magento-base > /dev/null 2>&1"                                                                                       # Pause vm
ssh user@"$REMOTE_IP" "virsh --connect qemu:///system dumpxml --update-cpu --domain magento-base > ~/workspaces/virtual-machines/magento-base/magento-base.xml"                             # Export vm
ssh user@"$REMOTE_IP" "virsh --connect qemu:///system snapshot-dumpxml --domain magento-base --snapshotname snapshot1 > ~/workspaces/virtual-machines/magento-base/snapshots/snapshot1.xml" # Export snapshot1

# Import domain (to new pc)
virsh --connect qemu:///system destroy --domain magento-base > /dev/null 2>&1                                                                                                          # Stop old vm
virsh --connect qemu:///system undefine --domain magento-base > /dev/null 2>&1                                                                                                         # Delete old vm
virsh --connect qemu:///system define ~/workspaces/virtual-machines/magento-base/magento-base.xml                                                                                      # Import new vm
virsh --connect qemu:///system snapshot-create --domain magento-base --xmlfile ~/workspaces/virtual-machines/magento-base/snapshots/snapshot1.xml --atomic --redefine --current --halt # Import snapshot1

问题当我启动域或新pc中的快照时，会得到以下错误：

The CPU is incompatible with host CPU

修正这个错误的正确方法是什么？谢谢。

Answer 1

目前还没有办法解决这个问题。“旧pc”和“新pc”都必须支持相同的cpu标志。

资料来源:来自libvirt IRC频道的答复：

- when you save the running VM state, the details of the current exposed guest CPU are recorded.
- when we restore the guest from saved state, we must ensure the host CPU is able to support all the features the guest was currently run with IOW, your new host  lacks some CPU flags that the old host had.
- there's no safe way to "fix" this problem in general.
- unless there's a BIOS update you're missing for your new host.