Neutron数据库同步错误 NotImplementedError: No support for ALTER of constraints in SQLite dialect

错误信息

root@controller:~# su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf \

--config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade juno" neutron

INFO  [alembic.migration] Context impl SQLiteImpl.

INFO  [alembic.migration] Will assume non-transactional DDL.

INFO  [alembic.migration] Running upgrade havana -> e197124d4b9, add unique constraint to members

Traceback (most recent call last):

  File "/usr/bin/neutron-db-manage", line 10, in <module>

    sys.exit(main())

  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/cli.py", line 173, in main

    CONF.command.func(config, CONF.command.name)

  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/cli.py", line 83, in do_upgrade_downgrade

    do_alembic_command(config, cmd, revision, sql=CONF.command.sql)

  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/cli.py", line 61, in do_alembic_command

    getattr(alembic_command, cmd)(config, *args, **kwargs)

  File "/usr/local/lib/python2.7/dist-packages/alembic/command.py", line 165, in upgrade

    script.run_env()

  File "/usr/local/lib/python2.7/dist-packages/alembic/script.py", line 390, in run_env

    util.load_python_file(self.dir, 'env.py')

  File "/usr/local/lib/python2.7/dist-packages/alembic/util.py", line 243, in load_python_file

    module = load_module_py(module_id, path)

  File "/usr/local/lib/python2.7/dist-packages/alembic/compat.py", line 79, in load_module_py

    mod = imp.load_source(module_id, path, fp)

  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/alembic_migrations/env.py", line 108, in <module>

    run_migrations_online()

  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/alembic_migrations/env.py", line 100, in run_migrations_online

    context.run_migrations()

  File "<string>", line 7, in run_migrations

  File "/usr/local/lib/python2.7/dist-packages/alembic/environment.py", line 738, in run_migrations

    self.get_context().run_migrations(**kw)

  File "/usr/local/lib/python2.7/dist-packages/alembic/migration.py", line 309, in run_migrations

    step.migration_fn(**kw)

  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/alembic_migrations/versions/e197124d4b9_add_unique_constrain.py", line 42, in upgrade

    local_cols=['pool_id', 'address', 'protocol_port']

  File "<string>", line 7, in create_unique_constraint

  File "/usr/local/lib/python2.7/dist-packages/alembic/operations.py", line 805, in create_unique_constraint

    schema=schema, **kw)

  File "/usr/local/lib/python2.7/dist-packages/alembic/ddl/sqlite.py", line 34, in add_constraint

    "No support for ALTER of constraints in SQLite dialect")

NotImplementedError: No support for ALTER of constraints in SQLite dialect

错误原因

如今用的数据库是mysql，可是当软件安装完之后会自己主动生成一个SQLite 轻量级数据库。在这儿之所以会出错是由于此处用了SQLite。 而上面的同步命令不符合SQLite的语法，所以会出错

解决方法

禁用SQLite。凝视掉/etc/neutron/neutron.conf文件里[database]节中的SQLite连接，例如以下：

# vim /etc/neutron/neutron.conf

[database]

connection = mysql://neutron:openstack@controller/neutron

#connection = sqlite:////var/lib/neutron/neutron.sqlite

再次运行同步语句

root@controller:~# su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade juno" neutron

INFO  [alembic.migration] Context impl MySQLImpl.

INFO  [alembic.migration] Will assume non-transactional DDL.

这样就ok了