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[Son Do Xuan <1939726@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

I have deployed Openstack Victoria from kolla-ansible tool and
Openvswich OVN for networking. neutron-ovn-db-sync generate OVN DB error
when any subnet has allocated all available IP address.

--------------------
2021-07-23 14:19:55.231 1417 ERROR neutron_ovn_db_sync_util   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/db/ipam_pluggable_backend.py", line 140, in _ipam_allocate_ips
2021-07-23 14:19:55.231 1417 ERROR neutron_ovn_db_sync_util     raise n_exc.IpAddressGenerationFailure(
2021-07-23 14:19:55.231 1417 ERROR neutron_ovn_db_sync_util neutron_lib.exceptions.IpAddressGenerationFailure: No more IP addresses available on network 15b718eb-4589-4b9f-8b95-aa5dc71da538.
--------------------

** Affects: neutron
     Importance: Undecided
         Status: New

** Summary changed:

- neutron-ovn-db-sync error when system have a subnet  
+ neutron-ovn-db-sync error

** Summary changed:

- neutron-ovn-db-sync error
+ neutron-ovn-db-sync error during generate OVN DB

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https://bugs.launchpad.net/bugs/1939726

Title:
  neutron-ovn-db-sync error during generate OVN DB

Status in neutron:
  New

Bug description:
  I have deployed Openstack Victoria from kolla-ansible tool and
  Openvswich OVN for networking. neutron-ovn-db-sync generate OVN DB
  error when any subnet has allocated all available IP address.

  --------------------
  2021-07-23 14:19:55.231 1417 ERROR neutron_ovn_db_sync_util   File "/var/lib/kolla/venv/lib/python3.8/site-packages/neutron/db/ipam_pluggable_backend.py", line 140, in _ipam_allocate_ips
  2021-07-23 14:19:55.231 1417 ERROR neutron_ovn_db_sync_util     raise n_exc.IpAddressGenerationFailure(
  2021-07-23 14:19:55.231 1417 ERROR neutron_ovn_db_sync_util neutron_lib.exceptions.IpAddressGenerationFailure: No more IP addresses available on network 15b718eb-4589-4b9f-8b95-aa5dc71da538.
  --------------------

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