yum install kvm

#To enable KVM explicitly, add the following configuration options /etc/nova/nova.conf:
 
compute_driver=libvirt.LibvirtDriver
libvirt_type=kvm

image types supported by KVM is

• Raw
• QEMU Copy-on-write (qcow2)
• VMWare virtual machine disk format (vmdk)

egrep '(vmx|svm)' --color=always /proc/cpuinfo

check if modules are already loaded

lsmod | grep kvm

### for Intel CPU ###
# modprobe kvm
# modprobe kvm-intel
Add the following lines to /etc/modules so that these modules will load on reboot:
 
kvm
kvm-intel
 
### for AMD CPU ###
AMD-based processors
 
If your compute host is AMD-based, run the following as root to load the kernel modules:
 
# modprobe kvm
# modprobe kvm-amd
Add the following lines to /etc/modules so that these modules will load on reboot:
 
kvm
kvm-amd

This step creates the user and database for nova

openstack-db --init --service nova --password dingqiqing

### install extra package
yum install openstack-utils memcached qpid-cpp-server