CentOS 6
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OpenStack Grizzly - Set Floating IP
2013/08/13
 
It's possible to access to Virtual machine Instance to set Floating IP address.
[1] Change Nova's setting first to assign Floating IP address automatically.
[root@dlp ~(keystone)]#
vi /etc/nova/nova.conf
# near line 26: add

flat_network_bridge = br100
auto_assign_floating_ip = True

[keystone_authtoken]
[root@dlp ~(keystone)]#
/etc/rc.d/init.d/openstack-nova-network restart

Stopping openstack-nova-network: [ OK ]
Starting openstack-nova-network: [ OK ]
[2] Set Floating IP address. For exmaple, assign 10.0.0.248/29 for Floating IP addresses in internal network 10.0.0.0/24.
[root@dlp ~(keystone)]#
nova-manage floating create --ip_range=10.0.0.248/29

[root@dlp ~(keystone)]#
nova-manage floating list 

None    10.0.0..249   None    nova    eth0
None    10.0.0..250   None    nova    eth0
None    10.0.0..251   None    nova    eth0
None    10.0.0..252   None    nova    eth0
None    10.0.0..253   None    nova    eth0
None    10.0.0..254   None    nova    eth0
[3] Create a new instance and boot it, then Floating IP is assgined automatically like follows. In the example below, The "10.0.0.249" is just the Floating IP.
# create and boot Instance

[root@dlp ~(keystone)]#
nova boot --flavor 3 --image d41846d5-c67c-49f2-a616-6c9a136bed3a --security_group default CentOS6_SRV

[root@dlp ~(keystone)]#
nova list 

+--------------------------------------+-------------+---------+--------------------------------+
| ID                                   | Name        | Status  | Networks                       |
+--------------------------------------+-------------+---------+--------------------------------+
| 96676b36-d13f-4f13-89ab-f269b3f28273 | CentOS6     | SHUTOFF | network01=10.1.0.2             |
| 0a40e76c-fc0b-49a1-94c5-a610e93ff9c0 | CentOS6_SRV | ACTIVE  | network01=10.1.0.3, 10.0.0.249 |
+--------------------------------------+-------------+---------+--------------------------------+
[4] The Instances created before setting Floating IP, Floating IP does not assigned automatically, so it necessarry to set it manually like follows.
[root@dlp ~(keystone)]#
nova list 

+--------------------------------------+-------------+---------+--------------------------------+
| ID                                   | Name        | Status  | Networks                       |
+--------------------------------------+-------------+---------+--------------------------------+
| 96676b36-d13f-4f13-89ab-f269b3f28273 | CentOS6     | SHUTOFF | network01=10.1.0.2             |
| 0a40e76c-fc0b-49a1-94c5-a610e93ff9c0 | CentOS6_SRV | SHUTOFF | network01=10.1.0.3, 10.0.0.249 |
+--------------------------------------+-------------+---------+--------------------------------+
# assign "10.0.0.250" to "CentOS6"

[root@dlp ~(keystone)]#
nova add-floating-ip CentOS6 10.0.0.250

[root@dlp ~(keystone)]#
nova list 

+--------------------------------------+-------------+---------+--------------------------------+
| ID                                   | Name        | Status  | Networks                       |
+--------------------------------------+-------------+---------+--------------------------------+
| 96676b36-d13f-4f13-89ab-f269b3f28273 | CentOS6     | SHUTOFF | network01=10.1.0.2, 10.0.0.250 |
| 0a40e76c-fc0b-49a1-94c5-a610e93ff9c0 | CentOS6_SRV | SHUTOFF | network01=10.1.0.3, 10.0.0.249 |
+--------------------------------------+-------------+---------+--------------------------------+
 
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