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[Expired for neutron because there has been no activity for 60 days.]

** Changed in: neutron
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1332564

Title:
  migrate_to_ml2.py fails. cannot find table networks

Status in neutron:
  Expired

Bug description:
  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.

  OS: Ubuntu 12.04.04 Kernel 3.11

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