Comment 0 for bug 1332564

during upgrade from havana to icehouse the database migration script (migrate_to_ml2.py) fails. I run it with the following options:
python -m neutron.db.migration.migrate_to_ml2 --tunnel-type gre --release icehouse openvswitch mysql://neutron:XXXXX@127.0.0.1/neutron

It returns the following trace:
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/migrate_to_ml2.py", line 462, in <module>
    main()
  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/migrate_to_ml2.py", line 458, in main
    args.vxlan_udp_port)
  File "/usr/lib/python2.7/dist-packages/neutron/db/migration/migrate_to_ml2.py", line 138, in __call__
    metadata.create_all(engine)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/schema.py", line 2848, in create_all
    tables=tables)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1479, in _run_visitor
    conn._run_visitor(visitorcallable, element, **kwargs)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1122, in _run_visitor
    **kwargs).traverse_single(element)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/visitors.py", line 122, in traverse_single
    return meth(obj, **kw)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/engine/ddl.py", line 56, in visit_metadata
    collection = [t for t in sql_util.sort_tables(tables)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/util.py", line 39, in sort_tables
    {'foreign_key': visit_foreign_key})
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/visitors.py", line 258, in traverse
    return traverse_using(iterate(obj, opts), obj, visitors)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/visitors.py", line 249, in traverse_using
    meth(target)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/sql/util.py", line 30, in visit_foreign_key
    parent_table = fkey.column.table
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 612, in __get__
    obj.__dict__[self.__name__] = result = self.fget(obj)
  File "/usr/lib/python2.7/dist-packages/sqlalchemy/schema.py", line 1474, in column
    tname)
sqlalchemy.exc.NoReferencedTableError: Foreign key associated with column 'ml2_network_segments.network_id' could not find table 'networks' with which to generate a foreign key to target column 'id'

If i create this table from the mysql console with this:

CREATE TABLE ml2_network_segments ( id VARCHAR(36) NOT NULL, network_id VARCHAR(36) NOT NULL, network_type VARCHAR(32) NOT NULL , physical_network VARCHAR(64), segmentation_id INT);
ALTER TABLE ml2_network_segmentsADD FOREIGN KEY (network_id) REFERENCES networks (id) ON DELETE cascade;
ALTER TABLE ml2_network_segments ADD PRIMARY KEY (id);

No error is given.