dsvm-functional can not run due to some ovs/ovn commands not found

[LIU Yulong]

The dsvm-functional test can not run even for those test cases not involved with OVN.

$ tox -e dsvm-functional neutron.tests.functional.db.test_migrations.TestModelsMigrationsMysql
dsvm-functional develop-inst-noop: /opt/stack/neutron
dsvm-functional installed:
...
...
=========================
Failures during discovery
=========================
--- import errors ---
Failed to import test module: neutron.tests.functional.plugins.ml2.drivers.ovn.mech_driver.ovsdb.test_impl_idl
Traceback (most recent call last):
  File "/usr/lib64/python3.6/unittest/loader.py", line 428, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib64/python3.6/unittest/loader.py", line 369, in _get_module_from_name
    __import__(name)
  File "/opt/stack/neutron/neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/test_impl_idl.py", line 21, in <module>
    from ovsdbapp.tests.functional import base
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/tests/functional/base.py", line 23, in <module>
    class FunctionalTestCase(base.TestCase):
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/tests/functional/base.py", line 28, in FunctionalTestCase
    remove=not bool(os.getenv('KEEP_VENV')))
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/venv.py", line 165, in __init__
    [self.SBSCHEMA, self.NBSCHEMA])
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/venv.py", line 75, in _share_path
    ", ".join(paths + (str(override),)))
Exception: Invalid directories: /usr/local/share/ovn, /usr/share/ovn, /usr/local/share/openvswitch, /usr/share/openvswitch, None

Failed to import test module: neutron.tests.functional.plugins.ml2.drivers.ovn.mech_driver.test_mech_driver
Traceback (most recent call last):
  File "/usr/lib64/python3.6/unittest/loader.py", line 428, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib64/python3.6/unittest/loader.py", line 369, in _get_module_from_name
    __import__(name)
  File "/opt/stack/neutron/neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py", line 24, in <module>
    from ovsdbapp.tests.functional import base as ovs_base
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/tests/functional/base.py", line 23, in <module>
    class FunctionalTestCase(base.TestCase):
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/tests/functional/base.py", line 28, in FunctionalTestCase
    remove=not bool(os.getenv('KEEP_VENV')))
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/venv.py", line 165, in __init__
    [self.SBSCHEMA, self.NBSCHEMA])
  File "/opt/stack/neutron/.tox/dsvm-functional/lib/python3.6/site-packages/ovsdbapp/venv.py", line 75, in _share_path
    ", ".join(paths + (str(override),)))
Exception: Invalid directories: /usr/local/share/ovn, /usr/share/ovn, /usr/local/share/openvswitch, /usr/share/openvswitch, None

================================================================================
The above traceback was encountered during test discovery which imports all the found test modules in the specified test_path.
ERROR: InvocationError for command /opt/stack/neutron/.tox/dsvm-functional/bin/stestr run '--group_regex=neutron\.tests\.functional\.db\.test_migrations\.(TestModelsMigrationsPsql|TestModelsMigrationsMysql)' neutron.tests.functional.db.test_migrations.TestModelsMigrationsMysql (exited with code 100)
__________________________________________________________ summary __________________________________________________________
ERROR: dsvm-functional: commands failed

After remove the cases:
$ git status
On branch packet_rate_limit
Changes not staged for commit:
  (use "git add/rm <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
 deleted: neutron/tests/functional/agent/ovn/__init__.py
 deleted: neutron/tests/functional/agent/ovn/metadata/__init__.py
 deleted: neutron/tests/functional/agent/ovn/metadata/test_metadata_agent.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/__init__.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/__init__.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/__init__.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/extensions/__init__.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/extensions/test_qos.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/test_impl_idl.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/test_maintenance.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/test_ovn_db_resources.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/test_ovn_db_sync.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/ovsdb/test_ovsdb_monitor.py
 deleted: neutron/tests/functional/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py

The tox cases
tox -e dsvm-functional neutron.tests.functional.db.test_migrations.TestModelsMigrationsMysql
can run without errors.

[Bernard Cafarelli (bcafarel)]

Looking at https://opendev.org/openstack/neutron/src/commit/d48d7609f7e08e0b6425aad96d380ef331a39cac/tools/configure_for_func_testing.sh#L103 I guess this is because when we do not have "$BUILD_OVS_FROM_SOURCE" == "True" (so with system packages), ovn is not in the list of packages to install?

[Slawek Kaplonski (slaweq)]

Did You run "tools/configure_for_func_testing.sh <devstack_path> -i" before running those tests? For me it always works fine after that.

[Brian Haley (brian-haley)]

Based on the comments from above, I'm guessing this is just a matter of running the script. If not please re-open.