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[LIU Yulong <yulong@xxxxxxxxxxxxx>]

Public bug reported:

ENV: stable/mitaka，VXLAN
Neutron API: two neutron-servers behind a HA proxy VIP.

Exception log:
[1] http://paste.openstack.org/show/585669/
[2] http://paste.openstack.org/show/585670/

Log [1] shows that the subnet of HA network is concurrently deleted
while a new HA router create API comes. Seems the race conditon
described in this bug is till exists :
https://bugs.launchpad.net/neutron/+bug/1533440

Log [2] has a very strange behavior that those 3 API has a same request-
id [req-780b1f6e-2b3c-4303-a1de-a5fb4c7ea31e].

Test scenario:
Just create one HA router for a tenant, and then quickly delete it.

For now, our mitaka ENV use VxLAN as tenant network type. So there is a very large range of VNI.
So don't save that, and temporarily solution, we add a new config to decide whether delete the HA network every time.

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: l3-ha

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https://bugs.launchpad.net/bugs/1633306

Title:
  Partial HA network causing HA router creation failed (race conditon)

Status in neutron:
  New

Bug description:
  ENV: stable/mitaka，VXLAN
  Neutron API: two neutron-servers behind a HA proxy VIP.

  Exception log:
  [1] http://paste.openstack.org/show/585669/
  [2] http://paste.openstack.org/show/585670/

  Log [1] shows that the subnet of HA network is concurrently deleted
  while a new HA router create API comes. Seems the race conditon
  described in this bug is till exists :
  https://bugs.launchpad.net/neutron/+bug/1533440

  Log [2] has a very strange behavior that those 3 API has a same
  request-id [req-780b1f6e-2b3c-4303-a1de-a5fb4c7ea31e].

  Test scenario:
  Just create one HA router for a tenant, and then quickly delete it.

  For now, our mitaka ENV use VxLAN as tenant network type. So there is a very large range of VNI.
  So don't save that, and temporarily solution, we add a new config to decide whether delete the HA network every time.

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