Network

shared VIP for e.g. clustered services

To create a shared VIP to use e.g. within a pacemaker cluster, do the following.

  1. Find the ID of the ports to assign the VIP to (do this for each server).
$ openstack port list --server myserver1
+--------------------------------------+------+-------------------+----------------------------------------------------------------------------+--------+
| ID                                   | Name | MAC Address       | Fixed IP Addresses                                                         | Status |
+--------------------------------------+------+-------------------+----------------------------------------------------------------------------+--------+
| 3db1151a-0d5e-4eab-a460-aeebe6d8af10 |      | fa:16:3e:e8:4e:31 | ip_address='10.250.7.17', subnet_id='d1e2aab6-d15d-466e-bb75-93873b8a6776' | ACTIVE |


$ openstack port list --server myserver2
+--------------------------------------+------+-------------------+----------------------------------------------------------------------------+--------+
| ID                                   | Name | MAC Address       | Fixed IP Addresses                                                         | Status |
+--------------------------------------+------+-------------------+----------------------------------------------------------------------------+--------+
| 949d8d35-2e59-4e04-9264-2b7ac9f258ac |      | fa:16:3e:f8:4a:a8 | ip_address='10.250.7.18', subnet_id='d1e2aab6-d15d-466e-bb75-93873b8a6776'  | ACTIVE |
  1. use the subnet_id to get the ID of the network
$ openstack subnet show d1e2aab6-d15d-466e-bb75-93873b8a6776 | grep network_id

| network_id        | 90f3c4d8-daf3-4fce-a46a-902f6dfcdbd1 |
  1. create a new port to “reserve” the VIP
$ openstack port create --network=90f3c4d8-daf3-4fce-a46a-902f6dfcdbd1 --fixed-ip ip-address=10.250.7.19 subnet=d1e2aab6-d15d-466e-bb75-93873b8a6776
  1. assign the new VIP to the ports you found out in 1.
$ openstack port set 8b41d841-1602-4e73-b63b-3ad9d6062de5 --allowed-address ip-address=10.250.7.19