OVN and OpenStack

Let us now turn our attention to the integration of OVN with OpenStack. The main element of this integration is the mapping of OpenStack Neutron objects to that of OVN. We will use DevStack to demonstrate different OpenStack operations and then show the corresponding OVN entities.

Running OVN using DevStack

We will now show you how to install and use OVN using DevStack. OVN has been extensively tested on Ubuntu 14.04 so we recommend that as the version to try with these steps:

1. The first step is to check out DevStack and OVN from GitHub.
   

2. Copy the sample local.conf from OVN to DevStack. If you view the local.conf file you will notice that the Neutron L2 agent (q-agt) is disabled. This is because OVN does not rely on the Neutron L2 Agent. It directly programs Open vSwitch using OpenFlow and OVSDB.
   

3. Run the stack.sh command from DevStack to set up your DevStack environment.

           ./stack.sh
   

4. Once DevStack runs successfully, we will open the contents of the Neutron ML2 configuration...