Where floating IPs are configured in a deployment, each project will have a limited number of floating IPs controlled by a quota. However, these need to be allocated to the project from the central pool prior to their use—usually by the administrator of the project. To allocate a floating IP to a project, use the button on the Access & Security page of the dashboard. The command line can also be used:
$ nova floating-ip-create
Once allocated, a floating IP can be assigned to running instances from the dashboard either by selecting from the actions drop-down next to the IP on the Access & Security page or by making this selection next to the instance you want to associate it with on the Instances page. The inverse action, , is available only from the Access & Security page and not from the Instances page.
To associate or disassociate a floating IP with a server from the command line, use the following commands:
$ nova add-floating-ip <server> <address>
$ nova remove-floating-ip <server> <address>
