Each instance has a private, fixed IP address that is assigned when the instance is launched. In addition, an instance can have a public or floating IP address. Private IP addresses are used for communication between instances, and public IP addresses are used for communication with networks outside the cloud, including the Internet.
As an administrator using legacy networking (nova-network), you can use the following bulk commands to list, create, and delete ranges of floating IP addresses. These addresses can then be associated with instances by end users.
To list all floating IP addresses for all projects, run:
$ nova floating-ip-bulk-list
+------------+---------------+---------------+--------+-----------+
| project_id | address | instance_uuid | pool | interface |
+------------+---------------+---------------+--------+-----------+
| None | 172.24.4.225 | None | public | eth0 |
| None | 172.24.4.226 | None | public | eth0 |
| None | 172.24.4.227 | None | public | eth0 |
| None | 172.24.4.228 | None | public | eth0 |
| None | 172.24.4.229 | None | public | eth0 |
| None | 172.24.4.230 | None | public | eth0 |
| None | 172.24.4.231 | None | public | eth0 |
| None | 172.24.4.232 | None | public | eth0 |
| None | 172.24.4.233 | None | public | eth0 |
| None | 172.24.4.234 | None | public | eth0 |
| None | 172.24.4.235 | None | public | eth0 |
| None | 172.24.4.236 | None | public | eth0 |
| None | 172.24.4.237 | None | public | eth0 |
| None | 172.24.4.238 | None | public | eth0 |
| None | 192.168.253.1 | None | test | eth0 |
| None | 192.168.253.2 | None | test | eth0 |
| None | 192.168.253.3 | None | test | eth0 |
| None | 192.168.253.4 | None | test | eth0 |
| None | 192.168.253.5 | None | test | eth0 |
| None | 192.168.253.6 | None | test | eth0 |
+------------+---------------+---------------+--------+-----------+
To create a range of floating IP addresses, run:
$ nova floating-ip-bulk-create [--pool POOL_NAME] [--interface INTERFACE] RANGE_TO_CREATE
For example:
$ nova floating-ip-bulk-create --pool test 192.168.1.56/29
By default, floating-ip-bulk-create uses the public pool and eth0 interface values.
Note
You should use a range of free IP addresses that is valid for your network. If you are not sure, at least try to avoid the DHCP address range:
To delete a range of floating IP addresses, run:
$ nova floating-ip-bulk-delete RANGE_TO_DELETE
For example:
$ nova floating-ip-bulk-delete 192.168.1.56/29
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