[Bug 1907686] Re: ovn: instance unable to retrieve metadata

[James Troup]

We also saw this after a round of package upgrades on a cloud.
python3-neutron went from 2:16.2.0-0ubuntu2~cloud0 to
2:16.2.0-0ubuntu3~cloud0 and ovn packages went from
20.03.1-0ubuntu1.1~cloud0 to 20.03.1-0ubuntu1.2~cloud0 (i.e. not an
upstream version change).

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https://bugs.launchpad.net/bugs/1907686

Title:
  ovn: instance unable to retrieve metadata

Status in charm-ovn-chassis:
  New
Status in neutron:
  New
Status in neutron package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu:focal
  OpenStack: ussuri
  Instance port: hardware offloaded

  instance created, attempts to access metadata - metadata agent can't
  resolve the port/network combination:

  2020-12-10 15:00:18.258 4732 INFO neutron.agent.ovn.metadata.agent [-] Port d65418a6-d0e9-47e6-84ba-3d02fe75131a in datapath 37706e4d-ce2a-4d81-8c61-3fd12437a0a7 bound to our ch
  assis
  2020-12-10 15:00:31.672 8062 ERROR neutron.agent.ovn.metadata.server [-] No port found in network 37706e4d-ce2a-4d81-8c61-3fd12437a0a7 with IP address 10.5.1.155
  2020-12-10 15:00:31.673 8062 INFO eventlet.wsgi.server [-] 10.5.1.155,<local> "GET /openstack HTTP/1.1" status: 404  len: 297 time: 0.0043790
  2020-12-10 15:00:34.639 8062 ERROR neutron.agent.ovn.metadata.server [-] No port found in network 37706e4d-ce2a-4d81-8c61-3fd12437a0a7 with IP address 10.5.1.155
  2020-12-10 15:00:34.639 8062 INFO eventlet.wsgi.server [-] 10.5.1.155,<local> "GET /openstack HTTP/1.1" status: 404  len: 297 time: 0.0040138

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