[OVN] localport might not be updated when create multiple subnets for its network

[Liu Xie]

When create a subnet for a specific network, ovn_client would update external_ids of metadata port.
We focus on these fileds of localport port: 'neutron:cidrs' and 'mac', because those fields contain fixed_ips.

But any scenarios like batch create multiple subnets for one network, its 'neutron:cidrs' and 'mac' might not updated.

metadata port info:
 neutron port-show 15f0d39b-445b-4b19-a32f-6db8136871de -c device_owner -c fixed_ips
+--------------+------------------------------------------------------------------------------------+
| Field | Value |
+--------------+------------------------------------------------------------------------------------+
| device_owner | network:distributed |
| fixed_ips | {"subnet_id": "373254b2-6791-4fe2-8038-30e91a9e9c8d", "ip_address": "192.168.0.2"} |
| | {"subnet_id": "d0d871af-158e-4f45-8af2-92f2058521a3", "ip_address": "192.168.1.2"} |
| | {"subnet_id": "eeac857f-ab0e-438f-9fa6-2ae0cd3de41a", "ip_address": "192.168.2.2"} |
+--------------+------------------------------------------------------------------------------------+

localport port info:
_uuid : 2e17ffa7-f501-49e5-97ce-9a8731e60699
chassis : []
datapath : cfebe6fc-52fc-43ec-a25b-73d30abe4d00
encap : []
external_ids : {"neutron:cidrs"="192.168.2.2/24", "neutron:device_id"=ovnmeta-d39ddf74-9542-4ebf-9d9b-a44d3c11d1fc, "neutron:device_owner"="network:distributed", "neutron:network_name"=neutron-d39ddf74-9542-4ebf-9d9b-a44d3c11d1fc, "neutron:port_name"="", "neutron:project_id"=fc5ea82972ce42499ddc18bc4733eaab, "neutron:revision_number"="4", "neutron:security_group_ids"=""}
gateway_chassis : []
ha_chassis_group : []
logical_port : "15f0d39b-445b-4b19-a32f-6db8136871de"
mac : ["fa:16:3e:e2:60:18 192.168.2.2"]
nat_addresses : []
options : {requested-chassis=""}
parent_port : []
tag : []
tunnel_key : 1
type : localport
up : false
virtual_parent : []

[Rodolfo Alonso (rodolfo-alonso-hernandez)]

Hello Liu:

Please check if you have [1] in your system. With this patch in place, I've tested creating a network and adding 3 subnets. The metadata port is correctly updated, as you can see in [2], both the LSP and the port binding records update the "mac" field.

Regards.

[1]https://review.opendev.org/q/Id5d4909caa521a899b97d83bdc1963b010e97dac
[2]https://paste.opendev.org/show/810237/

[Rodolfo Alonso (rodolfo-alonso-hernandez)]

Closing this bug. Please feel free to reopen it if needed, providing new information.