Openstack platform deployed with fuel in a virtual environment, the virtual machine can not be found to create.

Let me talk about my environment it is used in server memory Lenovo ThinkSystem SR650 enough, enough disk were created br-mgmt, br-prv, br-pub, br-pxe, br-stor these bridges, do 5 network, and then create three control three calculations, the deployment of a total of seven virtual machines. After the platform deployment is complete, open the dashboard to create an instance, we found that not create, error    cpu affinity is not supported virtualization may not be open. Check the VT-x this problem, check the cat / sys / module / kvm_intel / parameters / nested this file is found N Oh! Nested did not open. Then follow   https://blog.csdn.net/Linuxprobe18/article/details/78944974     steps that address the nesting open, finally, Troubleshooting.