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Hi Everyone, I'm trying to install identify service on Ubuntu 16.04 LTS. The guide I use: http://docs.openstack.org/mitaka/install-guide-ubuntu/keystone-install.htmlWhen I input this command:"su -s /bin/sh -c "keystone-manage db_sync" keystone", it report error below: 2016-09-06 19:01:07.303 4905 CRITICAL keystone [-] KeyError: 'connection' 2016-09-06 19:01:07.303 4905 ERROR keystone Traceback (most recent call last): 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/bin/keystone-manage", line 10, in <module>2016-09-06 19:01:07.303 4905 ERROR keystone     sys.exit(main()) 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/keystone/cmd/manage.py", line 47, in main 2016-09-06 19:01:07.303 4905 ERROR keystone     cli.main(argv=sys.argv, config_files=config_files) 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/keystone/cmd/cli.py", line 992, in main 2016-09-06 19:01:07.303 4905 ERROR keystone     CONF.command.cmd_class.main() 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/keystone/cmd/cli.py", line 371, in main 2016-09-06 19:01:07.303 4905 ERROR keystone     migration_helpers.sync_database_to_version(extension, version) 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/keystone/common/sql/migration_helpers.py", line 210, in sync_database_to_version 2016-09-06 19:01:07.303 4905 ERROR keystone     _sync_common_repo(version) 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/keystone/common/sql/migration_helpers.py", line 132, in _sync_common_repo 2016-09-06 19:01:07.303 4905 ERROR keystone     with sql.session_for_write() as session: 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__ 2016-09-06 19:01:07.303 4905 ERROR keystone     return self.gen.next() 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 759, in _transaction_scope 2016-09-06 19:01:07.303 4905 ERROR keystone     allow_async=self._allow_async) as resource: 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/contextlib.py", line 17, in __enter__ 2016-09-06 19:01:07.303 4905 ERROR keystone     return self.gen.next() 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 491, in _session 2016-09-06 19:01:07.303 4905 ERROR keystone     bind=self.connection, mode=self.mode) 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 272, in _create_session 2016-09-06 19:01:07.303 4905 ERROR keystone     self._start() 2016-09-06 19:01:07.303 4905 ERROR keystone   File "/usr/lib/python2.7/dist-packages/oslo_db/sqlalchemy/enginefacade.py", line 337, in _start 2016-09-06 19:01:07.303 4905 ERROR keystone     url_args['connection'], 2016-09-06 19:01:07.303 4905 ERROR keystone KeyError: 'connection' 2016-09-06 19:01:07.303 4905 ERROR keystone I don't know how to triage and fix this problem, would you like to help me?
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