Next, let's take a look at monitoring networking services. Networking services in general usually stay running, and things that go wrong are happening inside the running service. We will go ahead and put a service status check on each of them and add additional checks to make sure things are working across the board. Start with giving each of the network services a service status check—the same checks that the control services got:

neutron-dhcp-agent
neutron-l3-agent
neutron-lbaas-agent
neutron-metadata-agent
neutron-metering-agent
neutron-openvswitch-agent
neutron-ovs-cleanup
openvswitch

Now, let's look at what can be monitored to make sure that when these services say that they are running, the network service is actually running. The configuration we have used in this book uses VXLAN tunnels to build overlay networks for OpenStack tenants. What this means is that each compute node is connected to the network node and to each other with VXLAN tunnels that encapsulate...