Comment 6 for bug 1230323

Looks like this commit might be causing problems! I can't get the Neutron database schema installed on a fresh installation of Openstack Juno on Ubuntu 14.04 and it's failing on this migration. Using ML2 with OVS plugin, enabled L3 HA and DVR as well. Fresh installation so the database is empty when starting "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini upgrade head"

Traceback below. Added the full log as an attachment.

INFO [alembic.migration] Running upgrade 37f322991f59 -> 31d7f831a591, add constraint for routerid
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/lib/python2.7/dist-packages/alembic/command.py", line 125, in upgrade
    script.run_env()
  File "/usr/lib/python2.7/dist-packages/alembic/script.py", line 203, in run_env
    util.load_python_file(self.dir, 'env.py')
  File "/usr/lib/python2.7/dist-packages/alembic/util.py", line 212, in load_python_file
    module = load_module_py(module_id, path)
  File "/usr/lib/python2.7/dist-packages/alembic/compat.py", line 58, 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/lib/python2.7/dist-packages/alembic/environment.py", line 688, in run_migrations
    self.get_context().run_migrations(**kw)
  File "/usr/lib/python2.7/dist-packages/alembic/migration.py", line 258, in run_migrations
    change(**kw)
  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/alembic_migrations/versions/31d7f831a591_add_constraint_for_routerid.py", line 85, in upgrade
    cols=['router_id', 'l3_agent_id']
  File "<string>", line 7, in create_primary_key
  File "/usr/lib/python2.7/dist-packages/alembic/operations.py", line 518, in create_primary_key
    schema)
  File "/usr/lib/python2.7/dist-packages/alembic/ddl/impl.py", line 135, in add_constraint
    self._exec(schema.AddConstraint(const))
  File "/usr/lib/python2.7/dist-packages/alembic/ddl/impl.py", line 76, in _exec
    conn.execute(construct, *multiparams, **params)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 729, in execute
    return meth(self, multiparams, params)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/ddl.py", line 69, in _execute_on_connection
    return connection._execute_ddl(self, multiparams, params)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 783, in _execute_ddl
    compiled
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 958, in _execute_context
    context)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1156, in _handle_dbapi_exception
    util.raise_from_cause(newraise, exc_info)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/util/compat.py", line 199, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 951, in _execute_context
    context)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 436, in do_execute
    cursor.execute(statement, parameters)
  File "/usr/lib/python2.7/dist-packages/MySQLdb/cursors.py", line 174, in execute
    self.errorhandler(self, exc, value)
  File "/usr/lib/python2.7/dist-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
    raise errorclass, errorvalue
sqlalchemy.exc.OperationalError: (OperationalError) (1832, "Cannot change column 'l3_agent_id': used in a foreign key constraint 'routerl3agentbindings_ibfk_1'") 'ALTER TABLE routerl3agentbindings ADD CONSTRAINT pk_routerl3agentbindings PRIMARY KEY (router_id, l3_agent_id)' ()