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[Akihiro Motoki <1260233@xxxxxxxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1254246 ***
    https://bugs.launchpad.net/bugs/1254246

This is the same issue as bug 1254246.

** Tags added: db

** This bug has been marked a duplicate of bug 1254246
   somehow getting duplicate openvswitch agents for the same host

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https://bugs.launchpad.net/bugs/1260233

Title:
  db migration (agents constraint) fails when using ryu plugin

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  Ryu plugin does not support agent extension yet.
  Therefore, 511471cc46b_agent_ext_model_supp.py does not contain ryu plugin, and agents table is not created.
  However, 1fcfc149aca4_agents_unique_by_type_and_host.py does not consider this case.
  I think that migration_for_plugins of 1fcfc149aca4 should be the same as 511471cc46b's.

  2013-12-12 01:08:44 INFO  [alembic.migration] Running upgrade e197124d4b9 -> 1fcfc149aca4, Add a unique constraint on (agent_type, host) columns to prevent a race
  2013-12-12 01:08:44 condition when an agent entry is 'upserted'.
  2013-12-12 01:08:44 Traceback (most recent call last):
  2013-12-12 01:08:44   File "/usr/local/bin/neutron-db-manage", line 10, in <module>
  2013-12-12 01:08:44     sys.exit(main())
  2013-12-12 01:08:44   File "/opt/stack/neutron/neutron/db/migration/cli.py", line 143, in main
  2013-12-12 01:08:44     CONF.command.func(config, CONF.command.name)
  2013-12-12 01:08:44   File "/opt/stack/neutron/neutron/db/migration/cli.py", line 80, in do_upgrade_downgrade
  2013-12-12 01:08:44     do_alembic_command(config, cmd, revision, sql=CONF.command.sql)
  2013-12-12 01:08:44   File "/opt/stack/neutron/neutron/db/migration/cli.py", line 59, in do_alembic_command
  2013-12-12 01:08:44     getattr(alembic_command, cmd)(config, *args, **kwargs)
  2013-12-12 01:08:44   File "/usr/local/lib/python2.7/dist-packages/alembic/command.py", line 124, in upgrade
  2013-12-12 01:08:44     script.run_env()
  2013-12-12 01:08:44   File "/usr/local/lib/python2.7/dist-packages/alembic/script.py", line 193, in run_env
  2013-12-12 01:08:44     util.load_python_file(self.dir, 'env.py')
  2013-12-12 01:08:44   File "/usr/local/lib/python2.7/dist-packages/alembic/util.py", line 177, in load_python_file
  2013-12-12 01:08:44     module = load_module(module_id, path)
  2013-12-12 01:08:44   File "/usr/local/lib/python2.7/dist-packages/alembic/compat.py", line 39, in load_module
  2013-12-12 01:08:44     return imp.load_source(module_id, path, fp)
  2013-12-12 01:08:44   File "/opt/stack/neutron/neutron/db/migration/alembic_migrations/env.py", line 105, in <module>
  2013-12-12 01:08:44     run_migrations_online()
  2013-12-12 01:08:44   File "/opt/stack/neutron/neutron/db/migration/alembic_migrations/env.py", line 89, in run_migrations_online
  2013-12-12 01:08:44     options=build_options())
  2013-12-12 01:08:44   File "<string>", line 7, in run_migrations
  2013-12-12 01:08:44   File "/usr/local/lib/python2.7/dist-packages/alembic/environment.py", line 652, in run_migrations
  2013-12-12 01:08:45     self.get_context().run_migrations(**kw)
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/alembic/migration.py", line 224, in run_migrations
  2013-12-12 01:08:45     change(**kw)
  2013-12-12 01:08:45   File "/opt/stack/neutron/neutron/db/migration/alembic_migrations/versions/1fcfc149aca4_agents_unique_by_type_and_host.py", line 50, in upgrade
  2013-12-12 01:08:45     local_cols=['agent_type', 'host']
  2013-12-12 01:08:45   File "<string>", line 7, in create_unique_constraint
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/alembic/operations.py", line 539, in create_unique_constraint
  2013-12-12 01:08:45     schema=schema, **kw)
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/alembic/ddl/impl.py", line 135, in add_constraint
  2013-12-12 01:08:45     self._exec(schema.AddConstraint(const))
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/alembic/ddl/impl.py", line 76, in _exec
  2013-12-12 01:08:45     conn.execute(construct, *multiparams, **params)
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1449, in execute
  2013-12-12 01:08:45     params)
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1542, in _execute_ddl
  2013-12-12 01:08:45     compiled
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1698, in _execute_context
  2013-12-12 01:08:45     context)
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1691, in _execute_context
  2013-12-12 01:08:45     context)
  2013-12-12 01:08:45   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 331, in do_execute
  2013-12-12 01:08:45     cursor.execute(statement, parameters)
  2013-12-12 01:08:45   File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 174, in execute
  2013-12-12 01:08:45     self.errorhandler(self, exc, value)
  2013-12-12 01:08:45   File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
  2013-12-12 01:08:45     raise errorclass, errorvalue
  2013-12-12 01:08:45 sqlalchemy.exc.ProgrammingError: (ProgrammingError) (1146, "Table 'ovs_neutron.agents' doesn't exist") 'ALTER TABLE agents ADD CONSTRAINT uniq_agents0agent_type0host UNIQUE (agent_type, host)' ()

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