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[Ghanshyam Mann <1844568@xxxxxxxxxxxxxxxxxx>]

marking invalid from nova side as no fix needed on nova side for this.

** Changed in: nova
       Status: Triaged => Invalid

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https://bugs.launchpad.net/bugs/1844568

Title:
  [compute] "create_test_server" if networks is undefined and more than
  one network is present

Status in OpenStack Compute (nova):
  Invalid
Status in tempest:
  In Progress

Bug description:
  This problem was detected in "ServersNegativeTestJSON" [1]. When a
  server is created ("cls.create_test_server"), if a network is not
  defined but several networks are present in this project, Nova raises
  the exception "NetworkAmbiguous", a seen in this log snippet:

  Sep 13 23:44:15.520980 ubuntu-bionic-limestone-regionone-0011283625 devstack@n-api.service[27339]: DEBUG nova.network.neutronv2.api [None req-c95ecec2-8d10-4984-8ba9-b608161dd645 tempest-ServersNegativeTestJSON-445859222 tempest-ServersNegativeTestJSON-445859222] validate_networks() for None {{(pid=27340) validate_networks /opt/stack/nova/nova/network/neutronv2/api.py:2251}}
  Sep 13 23:44:15.754945 ubuntu-bionic-limestone-regionone-0011283625 devstack@n-api.service[27339]: INFO nova.api.openstack.wsgi [None req-c95ecec2-8d10-4984-8ba9-b608161dd645 tempest-ServersNegativeTestJSON-445859222 tempest-ServersNegativeTestJSON-445859222] HTTP exception thrown: Multiple possible networks found, use a Network ID to be more specific.

  
  We can see that the network information provided to the server creation is empty but Nova tries to assign a default single network for this server. However Nova does not assign this default network because several networks are present for this project ID. In this case, the server creation should be specific passing the network information.

  
  [1]https://58a87e825b9766115d07-cec36eea8e90c9127fc5a72b798cfeab.ssl.cf2.rackcdn.com/670177/9/check/networking-ovn-tempest-dsvm-ovs-release/b58638a/testr_results.html.gz

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