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[Lucas Alvares Gomes <lucasagomes@xxxxxxxxx>]

Public bug reported:

The OVN driver supports the extra_dhcp_opts extension, however, it does
not validate any options passed to it leading to a lot of confusion. The
user can input any value and OVN will accept it via the API (retuning
200) but, internally it will just ignore that option if not supported.

E.g:

(overcloud) [stack@undercloud-0 ~]$ neutron port-update --extra-dhcp-opt opt_name='interface-mtu',opt_value='1200' test_port
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
Updated port: test_port
(overcloud) [stack@undercloud-0 ~]$ openstack port show test_port | grep -i dhcp
| extra_dhcp_opts         | ip_version='4', opt_name='interface-mtu', opt_value='1200'


()[root@controller-2 /]# ovn-nbctl list dhcp_options a825bbdb-3de2-4cd2-aa75-11951894c087
_uuid               : a825bbdb-3de2-4cd2-aa75-11951894c087
cidr                : "192.168.30.0/24"
external_ids        : {"neutron:revision_number"="0", subnet_id="c35226d1-0984-4887-ad38-750c04fba350"}
options             : {classless_static_route="{169.254.169.254/32,192.168.30.2, 0.0.0.0/0,192.168.30.1}", dns_server="{172.16.0.1, 10.0.0.1}", lease_time="43200", mtu="1442", router="192.168.30.1", server_id="192.168.30.1", server_mac="fa:16:3e:95:ec:6f"}

** Affects: neutron
     Importance: Medium
     Assignee: Lucas Alvares Gomes (lucasagomes)
         Status: Confirmed


** Tags: ovn

** Changed in: neutron
   Importance: Undecided => High

** Changed in: neutron
     Assignee: (unassigned) => Lucas Alvares Gomes (lucasagomes)

** Changed in: neutron
       Status: New => Confirmed

** Tags added: ovn

** Changed in: neutron
   Importance: High => Medium

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https://bugs.launchpad.net/bugs/1874282

Title:
  [OVN] extra_dhcp_opts does not validate any options

Status in neutron:
  Confirmed

Bug description:
  The OVN driver supports the extra_dhcp_opts extension, however, it
  does not validate any options passed to it leading to a lot of
  confusion. The user can input any value and OVN will accept it via the
  API (retuning 200) but, internally it will just ignore that option if
  not supported.

  E.g:

  (overcloud) [stack@undercloud-0 ~]$ neutron port-update --extra-dhcp-opt opt_name='interface-mtu',opt_value='1200' test_port
  neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
  Updated port: test_port
  (overcloud) [stack@undercloud-0 ~]$ openstack port show test_port | grep -i dhcp
  | extra_dhcp_opts         | ip_version='4', opt_name='interface-mtu', opt_value='1200'

  
  ()[root@controller-2 /]# ovn-nbctl list dhcp_options a825bbdb-3de2-4cd2-aa75-11951894c087
  _uuid               : a825bbdb-3de2-4cd2-aa75-11951894c087
  cidr                : "192.168.30.0/24"
  external_ids        : {"neutron:revision_number"="0", subnet_id="c35226d1-0984-4887-ad38-750c04fba350"}
  options             : {classless_static_route="{169.254.169.254/32,192.168.30.2, 0.0.0.0/0,192.168.30.1}", dns_server="{172.16.0.1, 10.0.0.1}", lease_time="43200", mtu="1442", router="192.168.30.1", server_id="192.168.30.1", server_mac="fa:16:3e:95:ec:6f"}

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