[Bug 1899104] Re: [SRU] barbican-manage db upgrade fails with MySQL8

[Chris MacNaughton]

** Summary changed:

- barbican-manage db upgrade fails with MySQL8
+ [SRU] barbican-manage db upgrade fails with MySQL8

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https://bugs.launchpad.net/bugs/1899104

Title:
  [SRU] barbican-manage db upgrade fails with MySQL8

Status in barbican package in Ubuntu:
  Fix Released
Status in barbican source package in Focal:
  Triaged
Status in barbican source package in Groovy:
  Fix Released

Bug description:
  [Impact]

  New installations of OpenStack Barbican with Mysql8 fail with a
  traceback when trying to initialize the database

  [Test Case]

  Use the OpenStack charms to deploy Barbican on Ubuntu Focal. Using
  Focal is expected to have a traceback and with this change is expected
  to setup successfully.

  [Regression Potential]

  The regression potential for this is minimal as the package currently
  does not work at all with mysql8 which ships with Ubuntu Focal.

  The proposed change is a minimal change that merely removes a
  constraint creation that is only added by the relevant libraries with
  Mysql8.

  -----------------------------------------------------

  Running

  barbican-manage db upgrade fails with the following traceback when the
  DB is mysql8:

  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters Traceback (most recent call last):
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/base.py", line 1245, in _execute_context
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     self.dialect.do_execute(
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/sqlalchemy/engine/default.py", line 581, in do_execute
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     cursor.execute(statement, parameters)
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 170, in execute
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     result = self._query(query)
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/cursors.py", line 328, in _query
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     conn.query(q)
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 517, in query
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 732, in _read_query_result
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     result.read()
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 1075, in read
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     first_packet = self.connection._read_packet()
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/connections.py", line 684, in _read_packet
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     packet.check_error()
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/protocol.py", line 220, in check_error
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     err.raise_mysql_exception(self._data)
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters   File "/usr/lib/python3/dist-packages/pymysql/err.py", line 109, in raise_mysql_exception
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters     raise errorclass(errno, errval)
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters pymysql.err.InternalError: (3959, "Check constraint 'secret_acls_chk_2' uses column 'creator_only', hence column cannot be dropped or renamed.")
  2020-10-08 22:31:32.028 28131 ERROR oslo_db.sqlalchemy.exc_filters
  ERROR: (pymysql.err.InternalError) (3959, "Check constraint 'secret_acls_chk_2' uses column 'creator_only', hence column cannot be dropped or renamed.")
  [SQL: ALTER TABLE secret_acls CHANGE creator_only project_access BOOL NULL]

  Seems this is a known issue with alembic [0]

  [1] https://github.com/sqlalchemy/alembic/issues/699

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