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[Bug 1795222] [NEW] [l3] router agent side gateway IP not changed if directly change IP address

 

Public bug reported:

ENV:
stable/queens

Problem:
if directly change router gateway port IP address, in l3 agent side, the gateway IP does not changed in router related namespace.
Testing is on the stable/queens, but master code is basicly same.

Reproduce:

(1) add new IP (172.16.200.30) for the gateway port:
openstack port set --fixed-ip ip-address=172.16.200.30 df7c2bd7-3fa4-4ff3-9b09-a2f30f04d974

(2) remove the old gateway IP (172.16.100.30) from port:
openstack port unset --fixed-ip subnet=fda73661-1bcf-4916-b488-1d76dab7de36,ip-address=172.16.100.30 df7c2bd7-3fa4-4ff3-9b09-a2f30f04d974

+-----------------------+--------------------------------------------------------------------------------------+
| Field                 | Value                                                                                |
+-----------------------+--------------------------------------------------------------------------------------+
| admin_state_up        | True                                                                                 |
| allowed_address_pairs |                                                                                      |
| binding:host_id       | node4                                                                                |
| binding:profile       | {}                                                                                   |
| binding:vif_details   | {"port_filter": true, "datapath_type": "system", "ovs_hybrid_plug": false}           |
| binding:vif_type      | ovs                                                                                  |
| binding:vnic_type     | normal                                                                               |
| created_at            | 2018-09-29T09:08:44Z                                                                 |
| description           |                                                                                      |
| device_id             | b8de2bba-1b68-416c-8a08-971908e36927                                                 |
| device_owner          | network:router_gateway                                                               |
| extra_dhcp_opts       |                                                                                      |
| fixed_ips             | {"subnet_id": "fda73661-1bcf-4916-b488-1d76dab7de36", "ip_address": "172.16.200.30"} |
| id                    | df7c2bd7-3fa4-4ff3-9b09-a2f30f04d974                                                 |
| mac_address           | fa:16:3e:1f:3a:91                                                                    |
| name                  |                                                                                      |
| network_id            | 1a65147c-e704-4b2f-bf51-be5bf4e3e5e1                                                 |
| port_security_enabled | False                                                                                |
| project_id            |                                                                                      |
| qos_policy_id         |                                                                                      |
| revision_number       | 11                                                                                   |
| security_groups       |                                                                                      |
| status                | ACTIVE                                                                               |
| tags                  |                                                                                      |
| tenant_id             |                                                                                      |
| updated_at            | 2018-09-30T10:03:30Z                                                                 |
+-----------------------+--------------------------------------------------------------------------------------+

Both  (1) and (2) has no effects in the l3 agent qrouter-namespace or
(dvr snat-namespace).

** Affects: neutron
     Importance: Undecided
     Assignee: LIU Yulong (dragon889)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => LIU Yulong (dragon889)

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https://bugs.launchpad.net/bugs/1795222

Title:
  [l3] router agent side gateway IP not changed if directly change IP
  address

Status in neutron:
  New

Bug description:
  ENV:
  stable/queens

  Problem:
  if directly change router gateway port IP address, in l3 agent side, the gateway IP does not changed in router related namespace.
  Testing is on the stable/queens, but master code is basicly same.

  Reproduce:

  (1) add new IP (172.16.200.30) for the gateway port:
  openstack port set --fixed-ip ip-address=172.16.200.30 df7c2bd7-3fa4-4ff3-9b09-a2f30f04d974

  (2) remove the old gateway IP (172.16.100.30) from port:
  openstack port unset --fixed-ip subnet=fda73661-1bcf-4916-b488-1d76dab7de36,ip-address=172.16.100.30 df7c2bd7-3fa4-4ff3-9b09-a2f30f04d974

  +-----------------------+--------------------------------------------------------------------------------------+
  | Field                 | Value                                                                                |
  +-----------------------+--------------------------------------------------------------------------------------+
  | admin_state_up        | True                                                                                 |
  | allowed_address_pairs |                                                                                      |
  | binding:host_id       | node4                                                                                |
  | binding:profile       | {}                                                                                   |
  | binding:vif_details   | {"port_filter": true, "datapath_type": "system", "ovs_hybrid_plug": false}           |
  | binding:vif_type      | ovs                                                                                  |
  | binding:vnic_type     | normal                                                                               |
  | created_at            | 2018-09-29T09:08:44Z                                                                 |
  | description           |                                                                                      |
  | device_id             | b8de2bba-1b68-416c-8a08-971908e36927                                                 |
  | device_owner          | network:router_gateway                                                               |
  | extra_dhcp_opts       |                                                                                      |
  | fixed_ips             | {"subnet_id": "fda73661-1bcf-4916-b488-1d76dab7de36", "ip_address": "172.16.200.30"} |
  | id                    | df7c2bd7-3fa4-4ff3-9b09-a2f30f04d974                                                 |
  | mac_address           | fa:16:3e:1f:3a:91                                                                    |
  | name                  |                                                                                      |
  | network_id            | 1a65147c-e704-4b2f-bf51-be5bf4e3e5e1                                                 |
  | port_security_enabled | False                                                                                |
  | project_id            |                                                                                      |
  | qos_policy_id         |                                                                                      |
  | revision_number       | 11                                                                                   |
  | security_groups       |                                                                                      |
  | status                | ACTIVE                                                                               |
  | tags                  |                                                                                      |
  | tenant_id             |                                                                                      |
  | updated_at            | 2018-09-30T10:03:30Z                                                                 |
  +-----------------------+--------------------------------------------------------------------------------------+

  Both  (1) and (2) has no effects in the l3 agent qrouter-namespace or
  (dvr snat-namespace).

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