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[Dongcan Ye <yedongcan@xxxxxxxx>]

Public bug reported:

ENV
====================
1. Server side:
   enable router_distributed and l3_ha

2. Agent side:
   all L3 agent mode is dvr_snat (include network nodes and compute nodes)


How to reprocude:
=================
associate floatingip  -->  disassociate floatingip  --> reassociate floatingip

We hit trace info in l3 agent:
http://paste.openstack.org/show/589071/


Analysis
==========
When we processing floatingip (In the situation router's attribute is ha + dvr), in ha_router we only remove floatingip if ha state is 'master'[1], and in dvr_local_router we remove it's related IP rule.
Then we reassociate floatingip, it will hit RTNETLINK error. Because we had already delete the realted IP rule.


[1] https://github.com/openstack/neutron/blob/master/neutron/agent/l3/ha_router.py#L273

** Affects: neutron
     Importance: Undecided
     Assignee: Dongcan Ye (hellochosen)
         Status: New


** Tags: l3-dvr-backlog l3-ha

** Changed in: neutron
     Assignee: (unassigned) => Dongcan Ye (hellochosen)

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https://bugs.launchpad.net/bugs/1641535

Title:
  FIP failed to remove in router's standby node

Status in neutron:
  New

Bug description:
  ENV
  ====================
  1. Server side:
     enable router_distributed and l3_ha

  2. Agent side:
     all L3 agent mode is dvr_snat (include network nodes and compute nodes)

  
  How to reprocude:
  =================
  associate floatingip  -->  disassociate floatingip  --> reassociate floatingip

  We hit trace info in l3 agent:
  http://paste.openstack.org/show/589071/

  
  Analysis
  ==========
  When we processing floatingip (In the situation router's attribute is ha + dvr), in ha_router we only remove floatingip if ha state is 'master'[1], and in dvr_local_router we remove it's related IP rule.
  Then we reassociate floatingip, it will hit RTNETLINK error. Because we had already delete the realted IP rule.

  
  [1] https://github.com/openstack/neutron/blob/master/neutron/agent/l3/ha_router.py#L273

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