In Flat networking, the IP addresses for our instances are injected from a defined subnet of IP addresses at launch. To make this work, a network bridge is configured the same on each compute and network host in our cloud environment.
Only Linux distributions that keep their network information under
/etc/network/interfaces support Flat networking.
To begin with, ensure you're logged into the OpenStack API server.
If using the
openstack1 host created in Chapter 1, Starting OpenStack Compute, we will have three interfaces in our virtual instance:
eth0is a NAT to the host running VirtualBox
eth1is our floating (public) network (
eth2is our fixed (private) network (10.0.0.0/8)
In a physical production ...