The use of high availability in a Networking deployment helps mitigate the impact of individual node failures. In general, you can run neutron-server and neutron-dhcp-agent in an active/active fashion. You can run the neutron-l3-agent service as active/passive, which avoids IP conflicts with respect to gateway IP addresses.

You can run some Networking services in a cluster configuration (active/passive or active/active for Networking server only) with Pacemaker. 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 For information about how to build a cluster, see Pacemaker documentation.