The node where the nova-compute service is installed and
            operates on the same node that runs all of the virtual machines.
            This is referred to as the compute node in this guide.
By default, the selected hypervisor is KVM. To change to another hypervisor, change
            the virt_type option in the [libvirt] section of
                nova.conf and restart the nova-compute service.
Here are the general nova.conf
            options that are used to configure the compute node's
            hypervisor: Table 4.34, “Description of hypervisor configuration options”.
Specific options for particular hypervisors can be found in the following sections.

