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[Maciej Jozefczyk <1860141@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Sometimes there is a RACE condition on creation of VIP port that ends
with exception and blocks LB stack creation.


Example error:

2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils [req-a1e64a8e-5971-4b2f-afdf-33e026f193d6 - 968cd882ee5145d4a3e30b9612b0cae0 - default default] Provider 'ovn' raised a driver error: An unknown driver e
rror occurred.: octavia_lib.api.drivers.exceptions.DriverError: ('An unknown driver error occurred.', IpAddressAlreadyAllocatedClient())
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils Traceback (most recent call last):
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1843, in create_vip_port
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     project_id, lb_id, vip_dict)['port']
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1523, in create_vip_port
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     return network_driver.neutron_client.create_port(port)
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 803, in create_port
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     return self.post(self.ports_path, body=body)
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 359, in post
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     headers=headers, params=params)
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 294, in do_request
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     self._handle_fault_response(status_code, replybody, resp)
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 269, in _handle_fault_response
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     exception_handler_v20(status_code, error_body)
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 93, in exception_handler_v20
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     request_ids=request_ids)
2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils neutronclient.common.exceptions.IpAddressAlreadyAllocatedClient: IP address 172.30.188.22 already allocated in subnet 6cdca17f-c896-4684-9feb-6d0aa4aa3cb

** Affects: neutron
     Importance: Undecided
     Assignee: Maciej Jozefczyk (maciej.jozefczyk)
         Status: Confirmed


** Tags: ovn

** Changed in: neutron
       Status: New => Confirmed

** Changed in: neutron
     Assignee: (unassigned) => Maciej Jozefczyk (maciej.jozefczyk)

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https://bugs.launchpad.net/bugs/1860141

Title:
  [OVN] Provider driver fails while LB VIP port already created

Status in neutron:
  Confirmed

Bug description:
  Sometimes there is a RACE condition on creation of VIP port that ends
  with exception and blocks LB stack creation.

  
  Example error:

  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils [req-a1e64a8e-5971-4b2f-afdf-33e026f193d6 - 968cd882ee5145d4a3e30b9612b0cae0 - default default] Provider 'ovn' raised a driver error: An unknown driver e
  rror occurred.: octavia_lib.api.drivers.exceptions.DriverError: ('An unknown driver error occurred.', IpAddressAlreadyAllocatedClient())
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils Traceback (most recent call last):
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1843, in create_vip_port
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     project_id, lb_id, vip_dict)['port']
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/networking_ovn/octavia/ovn_driver.py", line 1523, in create_vip_port
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     return network_driver.neutron_client.create_port(port)
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 803, in create_port
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     return self.post(self.ports_path, body=body)
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 359, in post
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     headers=headers, params=params)
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 294, in do_request
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     self._handle_fault_response(status_code, replybody, resp)
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 269, in _handle_fault_response
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     exception_handler_v20(status_code, error_body)
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils   File "/usr/lib/python3.6/site-packages/neutronclient/v2_0/client.py", line 93, in exception_handler_v20
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils     request_ids=request_ids)
  2020-01-17 08:57:10.331 24 ERROR octavia.api.drivers.utils neutronclient.common.exceptions.IpAddressAlreadyAllocatedClient: IP address 172.30.188.22 already allocated in subnet 6cdca17f-c896-4684-9feb-6d0aa4aa3cb

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