Does Rackspace public cloud support nested visualization?
- Public Cloud
But once the cloud server boots up the cloud virtual CPU no longer exports the hardware CPU virtualization capabilities. You can verify this with this little script below.
egrep -i 'vmx|svm|ept|vpid|npt|tpr_shadow|flexpriority|vnmi'
That means you can't use your cloud server to run another, a guest hypervisor ( called as well nested hypervisor).
- Private cloud
If your cloud server doesn't offer nested virtualization support you can always use the emulation mode. Qemu supports running VM that way.