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[OpenStack Infra <1826726@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/656353
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=45957f12c897f6dcdf3676649a28dac866450afd
Submitter: Zuul
Branch:    master

commit 45957f12c897f6dcdf3676649a28dac866450afd
Author: LIU Yulong <i@xxxxxxxxxxxx>
Date:   Thu Apr 25 15:25:34 2019 +0800

    Keep HA ports info for HA router during entire lifecycle
    
    Once HA port is set, it must remain this value no matter
    what the server return. Because there is race condition
    between l3-agent side sync router info for processing
    and server side router deleting.
    
    This patch adds a helper function for every ha_port set
    action. If the ha_port is not None, it will always stay
    with original value.
    
    Closes-Bug: #1826726
    Change-Id: I96a088d25048be02a9c5b12c1d087df075b36fc4


** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1826726

Title:
  [L3] stale device/process remain in network node after router removed

Status in neutron:
  Fix Released

Bug description:
  [L3] stale device/process remain in network node after router removed

  ENV: stable/queens
  Step to reproduce:
  1. create HA router
  2. attach router interface to subnet
  3. remove router interface from subnet
  4. delete router

  Just run these 4 steps a few times, you may see there will be ha-ports
  and neutron-keepalived-state-change process remain in the network node
  after router was totally removed.

  Test script:

  function create_clean_net_struct()
  {

    neutron net-create scale-test-net-${1}
    subnet_id=`neutron subnet-create --name scale-test-subnet-${1} scale-test-net-${1} 192.168.${1}.0/24|grep "| id"|awk '{print $4}'`
    router_id=`neutron router-create scale-test-router-${1}|grep "| id"|awk '{print $4}'`
    neutron router-interface-add $router_id subnet=$subnet_id

    neutron router-interface-delete $router_id subnet=$subnet_id
    neutron router-delete $router_id
    neutron subnet-delete scale-test-subnet-${1}
    neutron net-delete scale-test-net-${1}
  }
  create_clean_net_struct $1

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