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I encountered the same problem, I follow the tutorial (search kairen openstack-ubuntu-newton kolla ), but the difference is that I use the kvm virtual machine as a controller , compute, network nodes.

I think the following tutorial may help you 1. About the guest host configuration Nested virtualization allows you to run a virtual machine (VM) inside another VM while still using hardware acceleration from the host. search devstack-with-nested-kvm 2. About the KVM virtual machine configuration CPU needs to configure Copy host CPU configuration search How_to_enable_nested_virtualization_in_KVM