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[OpenStack Infra <1827754@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.opendev.org/657207
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=3d99147e732ab4cdad0b8243e5fabb6a8954aa72
Submitter: Zuul
Branch:    master

commit 3d99147e732ab4cdad0b8243e5fabb6a8954aa72
Author: LIU Yulong <i@xxxxxxxxxxxx>
Date:   Wed Apr 24 14:19:36 2019 +0800

    Ensure dvr ha router gateway port binding host
    
    There are some extreme conditions which will result the unbound
    router gateway port. Then all the centralized floating IPs will
    not be reachable since the gateway port was set to 4095 tag.
    
    This patch adds the HA status to the router related port
    processing code path. If it is HA router, the gateway port
    will go to the right HA router processing code branch.
    
    Closes-Bug: #1827754
    Change-Id: Ida1c9f3a38171ea82adc2f11cb17945d6e2434be


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

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https://bugs.launchpad.net/bugs/1827754

Title:
  [L3] snat gateway port may stay 4095 after router fully initialized in
  l3 agent

Status in neutron:
  Fix Released

Bug description:
  ENV: stable/queens, but master branch has the same code.

  There are some extremly conditions which will result the unbound
  router gateway port. Then all the centrilized floating IPs will not be
  reachable since the gateway port was set to 4095 tag.

  How to reproduce:
  just simply creating dvr HA router, set gateway, and add interface.
  You can run the following script 100 times to create 100 routers:
  for i in {1..100};do script.sh $i;done
  Then you may see there are some gatway ports are set to 4095 in the snat node.

  Test script:
  function create_net_struct()
  {
    neutron router-create scale-test-router-${1}
    neutron net-create scale-test-net-${1}
    neutron subnet-create --name scale-test-subnet-${1} scale-test-net-${1} 192.168.${1}.0/24
    neutron router-gateway-set scale-test-router-${1} public
    neutron router-interface-add scale-test-router-${1} subnet=scale-test-subnet-${1}
  }

  create_net_struct $1

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