Creating and assigning floating IPs
Floating IPs in OpenStack are static IPv4 addresses that are mapped to instances behind Neutron routers and provide direct inbound connectivity to those instances. Floating IPs can be used in a similar fashion to Elastic IPs in Amazon Web Services, where users can quickly remap an IP address from one instance to another in the event of failure. The heart of this functionality is network address translation. A floating IP is usually considered an external address that is mapped to the internal address configured on an instance. The NAT is implemented on the Neutron router connected to the instance's network. Floating IPs offer connectivity to instances that would otherwise be isolated behind a Neutron router on a non-routable network.
Getting ready
Recall that instances are connected to ports that reflect the connected network and associated IP address. When creating a floating IP, the following information is required:
External network name or ID
When assigning...