[[openstack]]
==== install and configure KVM first ====
=== install kvm ===
<code bash>
yum install kvm
</code>

=== let nova use KVM ===
<code bash>
#To enable KVM explicitly, add the following configuration options /etc/nova/nova.conf:

compute_driver=libvirt.LibvirtDriver
libvirt_type=kvm
</code>

image types supported by KVM is
  * Raw
  * QEMU Copy-on-write (qcow2)
  * VMWare virtual machine disk format (vmdk)

=== check hardware virttualization support ===
<code bash>
egrep '(vmx|svm)' --color=always /proc/cpuinfo
</code>

=== load modules for KVM ===
check if modules are already loaded
<code bash>
lsmod | grep kvm
</code>

== if not, load them manually ==
<code bash>
### 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
</code>

==== init nova database and install necessary packages ====
=== init nova database ===
This step creates the user and database for nova
<code bash>
openstack-db --init --service nova --password dingqiqing
</code>

=== install extra packages for nova ===
<code bash>
### install extra package
yum install openstack-utils memcached qpid-cpp-server

</code>

==== Configure nova - the openstack compute (finally!) ====