networking-sfc-tempest-multinode job alway fails

[Bernard Cafarelli]

While the job has been non-voting for a very long time, it used to be mostly passing from the tests point of view.

Nowadays, it just fails to deploy properly, maybe with placement configuration issue or the OVN code merge. A sample recent failed log is at: https://zuul.opendev.org/t/openstack/build/ce7d73ced2c14435a9b0f3e9d13e79c8

And controller log ends with:
2021-02-16 00:39:37.060 | Found 2 cell mappings.
2021-02-16 00:39:37.060 | Skipping cell0 since it does not contain hosts.
2021-02-16 00:39:37.061 | Getting computes from cell 'cell1': 15e60ee8-a3a0-4fac-87c7-b0cd09f58336
2021-02-16 00:39:37.061 | Checking host mapping for compute host 'ubuntu-bionic-rax-dfw-0023028207': a524269c-761f-4e93-8b15-d2f6a70e0fa6
2021-02-16 00:39:37.061 | Creating host mapping for compute host 'ubuntu-bionic-rax-dfw-0023028207': a524269c-761f-4e93-8b15-d2f6a70e0fa6
2021-02-16 00:39:37.061 | Found 1 unmapped computes in cell: 15e60ee8-a3a0-4fac-87c7-b0cd09f58336
2021-02-16 00:39:37.550 | + ./stack.sh:main:1437 : /usr/local/bin/nova-status --config-file /etc/nova/nova.conf upgrade check
2021-02-16 00:39:40.656 | +---------------------------------------------------------------+
2021-02-16 00:39:40.656 | | Upgrade Check Results |
2021-02-16 00:39:40.656 | +---------------------------------------------------------------+
2021-02-16 00:39:40.656 | | Check: Cells v2 |
2021-02-16 00:39:40.656 | | Result: Success |
2021-02-16 00:39:40.656 | | Details: None |
2021-02-16 00:39:40.656 | +---------------------------------------------------------------+
2021-02-16 00:39:40.656 | | Check: Placement API |
2021-02-16 00:39:40.656 | | Result: Success |
2021-02-16 00:39:40.656 | | Details: None |
2021-02-16 00:39:40.656 | +---------------------------------------------------------------+
2021-02-16 00:39:40.656 | | Check: Ironic Flavor Migration |
2021-02-16 00:39:40.656 | | Result: Success |
2021-02-16 00:39:40.656 | | Details: None |
2021-02-16 00:39:40.656 | +---------------------------------------------------------------+
2021-02-16 00:39:40.656 | | Check: Cinder API |
2021-02-16 00:39:40.656 | | Result: Warning |
2021-02-16 00:39:40.656 | | Details: Unable to determine Cinder API version due to error: |
2021-02-16 00:39:40.656 | | publicURL endpoint for volumev3 service in RegionOne |
2021-02-16 00:39:40.656 | | region not found |
2021-02-16 00:39:40.656 | +---------------------------------------------------------------+
2021-02-16 00:39:40.657 | | Check: Policy Scope-based Defaults |
2021-02-16 00:39:40.657 | | Result: Success |
2021-02-16 00:39:40.657 | | Details: None |
2021-02-16 00:39:40.657 | +---------------------------------------------------------------+
2021-02-16 00:39:40.657 | | Check: Policy File JSON to YAML Migration |
2021-02-16 00:39:40.657 | | Result: Success |
2021-02-16 00:39:40.657 | | Details: None |
2021-02-16 00:39:40.657 | +---------------------------------------------------------------+
2021-02-16 00:39:40.657 | | Check: Older than N-1 computes |
2021-02-16 00:39:40.657 | | Result: Success |
2021-02-16 00:39:40.657 | | Details: None |
2021-02-16 00:39:40.657 | +---------------------------------------------------------------+
2021-02-16 00:39:41.058 | ++ ./stack.sh:main:1437 : err_trap
2021-02-16 00:39:41.060 | ++ ./stack.sh:err_trap:541 : local r=1
2021-02-16 00:39:41.064 | stack.sh failed: full log in /opt/stack/logs/devstacklog.txt.2021-02-16-002210
2021-02-16 00:39:41.067 | Error on exit
2021-02-16 00:39:43.189 | nova-compute: no process found
2021-02-16 00:39:43.211 | neutron-dhcp-agent: no process found
2021-02-16 00:39:43.229 | neutron-l3-agent: no process found
2021-02-16 00:39:43.263 | neutron-metadata-agent: no process found
2021-02-16 00:39:43.281 | neutron-openvswitch-agent: no process found