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[Bug 1943436] [NEW] nova-manage db version fails with: AttributeError: 'Engine' object has no attribute 'get_main_option'

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Balazs Gibizer <1943436@xxxxxxxxxxxxxxxxxx>
Date: Mon, 13 Sep 2021 09:59:40 -0000
Reply-to: Bug 1943436 <1943436@xxxxxxxxxxxxxxxxxx>
Sender: noreply@xxxxxxxxxxxxx
Public bug reported:

It seems that after the alembic change merged the nova-manage db sync
fails with an exception:

stack@aio:/opt/stack/nova$ nova-manage db version
/usr/lib/python3/dist-packages/secretstorage/dhcrypto.py:15: CryptographyDeprecationWarning: int_from_bytes is deprecated, use int.from_bytes instead
  from cryptography.utils import int_from_bytes
/usr/lib/python3/dist-packages/secretstorage/util.py:19: CryptographyDeprecationWarning: int_from_bytes is deprecated, use int.from_bytes instead
  from cryptography.utils import int_from_bytes
DEBUG migrate.versioning.repository [-] Loading repository /opt/stack/nova/nova/db/main/legacy_migrations... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/repository.py:76}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/417_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/417_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/413_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/413_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/405_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/405_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/422_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/422_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/415_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/415_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/419_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/419_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/408_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/408_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/410_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/410_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/403_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/403_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/412_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/412_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/402_train.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/402_train.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/406_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/406_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/407_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/407_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/420_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/420_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/414_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/414_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/418_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/418_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/404_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/404_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/409_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/409_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/421_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/421_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/416_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/416_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/411_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/411_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
DEBUG migrate.versioning.repository [-] Repository /opt/stack/nova/nova/db/main/legacy_migrations loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/repository.py:82}}
DEBUG migrate.versioning.repository [-] Config: {'db_settings': {'repository_id': 'nova', 'version_table': 'migrate_version', 'required_dbs': '[]'}} {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/repository.py:83}}
INFO alembic.runtime.migration [-] Context impl MySQLImpl.
INFO alembic.runtime.migration [-] Will assume non-transactional DDL.
An error has occurred:
Traceback (most recent call last):
  File "/opt/stack/nova/nova/cmd/manage.py", line 3178, in main
    ret = fn(*fn_args, **fn_kwargs)
  File "/opt/stack/nova/nova/cmd/manage.py", line 224, in version
    print(migration.db_version())
  File "/opt/stack/nova/nova/db/migration.py", line 173, in db_version
    alembic_version = alembic_api.current(engine)
  File "/usr/local/lib/python3.8/dist-packages/alembic/command.py", line 527, in current
    script = ScriptDirectory.from_config(config)
  File "/usr/local/lib/python3.8/dist-packages/alembic/script/base.py", line 150, in from_config
    script_location = config.get_main_option("script_location")
AttributeError: 'Engine' object has no attribute 'get_main_option'

** Affects: nova
     Importance: Critical
     Assignee: Balazs Gibizer (balazs-gibizer)
         Status: Triaged


** Tags: xena-rc-potential

** Changed in: nova
     Assignee: (unassigned) => Balazs Gibizer (balazs-gibizer)

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

** Changed in: nova
   Importance: Undecided => Critical

** Tags added: xena-rc-potential

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1943436

Title:
  nova-manage db version fails with: AttributeError: 'Engine' object has
  no attribute 'get_main_option'

Status in OpenStack Compute (nova):
  Triaged

Bug description:
  It seems that after the alembic change merged the nova-manage db sync
  fails with an exception:

  stack@aio:/opt/stack/nova$ nova-manage db version
  /usr/lib/python3/dist-packages/secretstorage/dhcrypto.py:15: CryptographyDeprecationWarning: int_from_bytes is deprecated, use int.from_bytes instead
    from cryptography.utils import int_from_bytes
  /usr/lib/python3/dist-packages/secretstorage/util.py:19: CryptographyDeprecationWarning: int_from_bytes is deprecated, use int.from_bytes instead
    from cryptography.utils import int_from_bytes
  DEBUG migrate.versioning.repository [-] Loading repository /opt/stack/nova/nova/db/main/legacy_migrations... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/repository.py:76}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/417_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/417_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/413_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/413_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/405_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/405_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/422_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/422_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/415_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/415_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/419_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/419_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/408_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/408_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/410_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/410_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/403_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/403_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/412_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/412_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/402_train.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/402_train.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/406_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/406_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/407_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/407_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/420_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/420_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/414_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/414_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/418_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/418_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/404_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/404_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/409_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/409_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/421_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/421_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/416_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/416_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.script.base [-] Loading script /opt/stack/nova/nova/db/main/legacy_migrations/versions/411_placeholder.py... {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:27}}
  DEBUG migrate.versioning.script.base [-] Script /opt/stack/nova/nova/db/main/legacy_migrations/versions/411_placeholder.py loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/script/base.py:30}}
  DEBUG migrate.versioning.repository [-] Repository /opt/stack/nova/nova/db/main/legacy_migrations loaded successfully {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/repository.py:82}}
  DEBUG migrate.versioning.repository [-] Config: {'db_settings': {'repository_id': 'nova', 'version_table': 'migrate_version', 'required_dbs': '[]'}} {{(pid=122970) __init__ /usr/local/lib/python3.8/dist-packages/migrate/versioning/repository.py:83}}
  INFO alembic.runtime.migration [-] Context impl MySQLImpl.
  INFO alembic.runtime.migration [-] Will assume non-transactional DDL.
  An error has occurred:
  Traceback (most recent call last):
    File "/opt/stack/nova/nova/cmd/manage.py", line 3178, in main
      ret = fn(*fn_args, **fn_kwargs)
    File "/opt/stack/nova/nova/cmd/manage.py", line 224, in version
      print(migration.db_version())
    File "/opt/stack/nova/nova/db/migration.py", line 173, in db_version
      alembic_version = alembic_api.current(engine)
    File "/usr/local/lib/python3.8/dist-packages/alembic/command.py", line 527, in current
      script = ScriptDirectory.from_config(config)
    File "/usr/local/lib/python3.8/dist-packages/alembic/script/base.py", line 150, in from_config
      script_location = config.get_main_option("script_location")
  AttributeError: 'Engine' object has no attribute 'get_main_option'

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Follow ups

[Bug 1943436] Re: nova-manage db version fails with: AttributeError: 'Engine' object has no attribute 'get_main_option'
From: OpenStack Infra, 2021-09-13