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[venkata anil <anil.venkata@xxxxxxxxxxxx>]

Public bug reported:

When a router is migrated between DVR+HA and HA(i.e DVR+HA->HA and
HA->DVR+HA), redundant "network:router_ha_interface" ports are created.

To reproduce the issue(2 node setup with "dvr" and "dvr-snat" modes is sufficient), create a router 
dr1 in DVR+HA mode. Then repeatedly flip this router's  DVR+HA and HA flags. You can see redundant "network:router_ha_interface" ports.

I have a 2 node devstack setup, 1st l3-agent in "dvr" mode and 2nd one in "dvr-snat" mode.
Whenever  HA flag is set to router, port with device_owner "network:router_ha_interface" should be created for only 2nd node i.e l3 agent  with "dvr-snat" mode.

Steps to reproduce:
1) create a network n1, and subnet on this network with name sn1
2) create a DVR+HA router(with name 'dr1'), attach it to sn1 through router interface add and set gateway(router-gateway-set public)
3) boot a vm on n1 and associate a floating ip
4) set admin-state to False i.e neutron router-update --admin-state-up False dr1
5) Now update the router to HA  i.e
   neutron router-update --distributed=False --ha=True <router-id>
   set admin-state to True
6) There will be two "network:router_ha_interface" ports, though one will be used by qrouter-xx namespace
7_ Again update router to DVR+HA
8) There will be three "network:router_ha_interface" ports, though one will be used by snat-xx namespace

I observed the "network:router_ha_interface" port first created will
always be used by qrouter-xx(when router is HA) and snat-xx(when router
is DVR+HA) and later created ports are never used.

** Affects: neutron
     Importance: Undecided
     Assignee: venkata anil (anil-venkata)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => venkata anil (anil-venkata)

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https://bugs.launchpad.net/bugs/1715370

Title:
  Migration between DVR+HA and HA creating redundant
  "network:router_ha_interface" ports

Status in neutron:
  New

Bug description:
  When a router is migrated between DVR+HA and HA(i.e DVR+HA->HA and
  HA->DVR+HA), redundant "network:router_ha_interface" ports are
  created.

  To reproduce the issue(2 node setup with "dvr" and "dvr-snat" modes is sufficient), create a router 
  dr1 in DVR+HA mode. Then repeatedly flip this router's  DVR+HA and HA flags. You can see redundant "network:router_ha_interface" ports.

  I have a 2 node devstack setup, 1st l3-agent in "dvr" mode and 2nd one in "dvr-snat" mode.
  Whenever  HA flag is set to router, port with device_owner "network:router_ha_interface" should be created for only 2nd node i.e l3 agent  with "dvr-snat" mode.

  Steps to reproduce:
  1) create a network n1, and subnet on this network with name sn1
  2) create a DVR+HA router(with name 'dr1'), attach it to sn1 through router interface add and set gateway(router-gateway-set public)
  3) boot a vm on n1 and associate a floating ip
  4) set admin-state to False i.e neutron router-update --admin-state-up False dr1
  5) Now update the router to HA  i.e
     neutron router-update --distributed=False --ha=True <router-id>
     set admin-state to True
  6) There will be two "network:router_ha_interface" ports, though one will be used by qrouter-xx namespace
  7_ Again update router to DVR+HA
  8) There will be three "network:router_ha_interface" ports, though one will be used by snat-xx namespace

  I observed the "network:router_ha_interface" port first created will
  always be used by qrouter-xx(when router is HA) and snat-xx(when
  router is DVR+HA) and later created ports are never used.

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