zub-db-manage upgrade get an 'ValueError: There must be at least one plugin active.' error!

[hu]

root@ocata-dev-container:~/setup# zun-db-manage upgrade
Traceback (most recent call last):
  File "/usr/local/bin/zun-db-manage", line 11, in <module>
    sys.exit(main())
  File "/usr/local/lib/python2.7/dist-packages/zun/cmd/db_manage.py", line 67, in main
    CONF.command.func()
  File "/usr/local/lib/python2.7/dist-packages/zun/cmd/db_manage.py", line 29, in do_upgrade
    migration.upgrade(CONF.command.revision)
  File "/usr/local/lib/python2.7/dist-packages/zun/db/migration.py", line 35, in upgrade
    return get_backend().upgrade(version)
  File "/usr/local/lib/python2.7/dist-packages/zun/db/sqlalchemy/migration.py", line 75, in upgrade
    get_manager().upgrade(version)
  File "/usr/local/lib/python2.7/dist-packages/zun/db/sqlalchemy/migration.py", line 49, in get_manager
    _MANAGER = manager.MigrationManager(migration_config)
  File "/usr/local/lib/python2.7/dist-packages/oslo_db/sqlalchemy/migration_cli/manager.py", line 47, in __init__
    raise ValueError('There must be at least one plugin active.')
ValueError: There must be at least one plugin active.
root@ocata-dev-container:~/setup#

Setp:
install_zun: PBR_VERSION=0.0.1 pip_install $TOP_DIR/files/tarball/zun-master.zip
install_zunclient: PBR_VERSION==0.0.1 pip_install $TOP_DIR/files/tarball/python-zunclient-master.zip
configure_zun: sudo cp /tmp/zun-master/etc/zun/* $ZUN_CONF_DIR && sudo chown -R root:zun $ZUN_CONF_DIR
create_zun_conf(same as devstack)

after these steps I run: `which zun-db-manage` upgrade and get a ValueError: There must be at least one plugin active. error.

[hu (sayseesea)]

solve it by add missing files to the right path:
/usr/local/lib/python2.7/dist-packages/zun/db/sqlalchemy/alembic/*
/usr/local/lib/python2.7/dist-packages/zun/db/sqlalchemy/alembic.ini

[hongbin (hongbin034)]

Hu, it looks you have already resolved the problem. I am going to close this bug, but please feel free to re-open it if the problem still exists.