External network access
Every tenant will have at least one network to launch instances on, which will be built as we have just built a network. Whenever a new tenant is created, the steps that have just been performed will need to be performed for that new tenant. All tenants will share a network that provides external access to the outside world. Let's work through creating this external network.
Preparing a network
Earlier, we discussed how Neutron is an a API layer that manages virtual networking resources. The preparation for external network access will be different for different Neutron plugins. Talk to your networking vendor for your specific implementation. In general, what's being accomplished by this preparation is the connection of the networking node to a set of externally routeable IP addresses. External just means external to the OpenStack cluster. These may be a pool within your company's 10.0.0.0/8 network or a pool of IPs public to the Internet. The tenant network IP addresses...
