First of all we should install the virtualization software needed for running the various VMs which will host the OpenStack services.

• Install the needed software:

  # yum install kvm virt-manager libvirt

• Start the libvirt daemon:

  # /etc/init.d/libvirtd start

Once you are done you can start setting up the VMs needed for the Openstack Services. You will need an Ubuntu 12.04 Server iso on the host, which you can get by doing:

# wget http://releases.ubuntu.com/precise/ubuntu-12.04.2-server-amd64.iso

• Install the needed software: 'bridge-utils' and 'tunctl'

  # yum install bridge-utils tunctl

• Create the bridge and add the eth1 interface to it:

  # brctl addbr br1
  # brctl addif br1 eth1
  

• Add the ifcfg-br1 configuration file in /etc/sysconfig/network-scripts/

It should look like this:

DEVICE="br1"
BOOTPROTO=static
TYPE=Bridge
DELAY=0
ONBOOT="yes"
BROADCAST=10.0.0.255
# 1 is assigned to the machine hosting the OpenStack services
# 2 is assigned to the machine hosting nova-compute.
IPADDR=10.0.0.{1,2}
NETMASK=255.255.255.0
NETWORK=10.0.0.0
NM_CONTROLLED=no

Bridge interface probably needed also for the public interface eth0.

• Change the ifcfg-eth1 configuration file in /etc/sysconfig/network-scripts/

It should look like this:

DEVICE=eth1
BOOTPROTO=static
TYPE=Ethernet
VLAN=no
ONBOOT=yes
NM_CONTROLLED=no
BRIDGE=br1

• Restart the network

  # service network restart

• Edit the /etc/hosts file with:

  10.0.0.3    db-node
  10.0.0.4    auth-node
  10.0.0.5    image-node
  10.0.0.6    api-node
  10.0.0.7    network-node
  10.0.0.8    volume-node
  10.0.0.20   compute-1
  10.0.0.21   compute-2