Several aspects of an OpenStack Networking deployment benefit from high-availabilty to withstand individual node failures. In general, neutron-server and neutron-dhcp-agent can be run in an active-active fashion. The neutron-l3-agent service can be run only as active/passive, to avoid IP conflicts with respect to gateway IP addresses.

You can run some OpenStack Networking services into a cluster (Active / Passive or Active / Active for OpenStack Networking Server only) with Pacemaker. Here you can download the latest Resources Agents : neutron-server: https://github.com/madkiss/openstack-resource-agents neutron-dhcp-agent : https://github.com/madkiss/openstack-resource-agents   neutron-l3-agent : https://github.com/madkiss/openstack-resource-agents   If you need more informations about "How to build a cluster", please refer to Pacemaker documentation.