Removing deprecated min_pool_size

The database option min_pool_size is not actually
used in oslo.db.

This is a folllow up to
Ib07b7b4200b5cf3a34b8eed441e6754da7d446cf

Change-Id: I89754e9e4b42c45259729b0b0bb0a4bf464a981c

oslo_db/options.py

@@ -67,17 +67,6 @@ database_opts = [
              'pool longer than this number of seconds will be replaced '
              'with a new one the next time they are checked out from '
              'the pool.'),
-    cfg.IntOpt('min_pool_size',
-               default=1,
-               deprecated_opts=[cfg.DeprecatedOpt('sql_min_pool_size',
-                                                  group='DEFAULT'),
-                                cfg.DeprecatedOpt('sql_min_pool_size',
-                                                  group='DATABASE')],
-               deprecated_for_removal=True,
-               deprecated_reason='The option to set the minimum pool '
-                                 'size is not supported by sqlalchemy.',
-               help='Minimum number of SQL connections to keep open in a '
-                    'pool.'),
     cfg.IntOpt('max_pool_size',
                default=5,
                deprecated_opts=[cfg.DeprecatedOpt('sql_max_pool_size',

oslo_db/sqlalchemy/enginefacade.py

@@ -181,7 +181,7 @@ class _TransactionFactory(object):
             (k, _Default(None)) for k in [
                 'db_max_retries', 'db_inc_retry_interval',
                 'use_db_reconnect',
-                'db_retry_interval', 'min_pool_size',
+                'db_retry_interval',
                 'db_max_retry_interval', 'backend', 'use_tpool'])
 
         self._started = False

oslo_db/tests/sqlalchemy/test_options.py

@@ -30,7 +30,6 @@ class DbApiOptionsTestCase(test_utils.BaseTestCase):
     def test_deprecated_session_parameters(self):
         path = self.create_tempfiles([["tmp", b"""[DEFAULT]
 sql_connection=x://y.z
-sql_min_pool_size=10
 sql_max_pool_size=20
 sql_max_retries=30
 sql_retry_interval=40
@@ -40,7 +39,6 @@ sql_connection_trace=True
 """]])[0]
         self.conf(['--config-file', path])
         self.assertEqual('x://y.z', self.conf.database.connection)
-        self.assertEqual(10, self.conf.database.min_pool_size)
         self.assertEqual(20, self.conf.database.max_pool_size)
         self.assertEqual(30, self.conf.database.max_retries)
         self.assertEqual(40, self.conf.database.retry_interval)
@@ -51,7 +49,6 @@ sql_connection_trace=True
     def test_session_parameters(self):
         path = self.create_tempfiles([["tmp", b"""[database]
 connection=x://y.z
-min_pool_size=10
 max_pool_size=20
 max_retries=30
 retry_interval=40
@@ -62,7 +59,6 @@ pool_timeout=7
 """]])[0]
         self.conf(['--config-file', path])
         self.assertEqual('x://y.z', self.conf.database.connection)
-        self.assertEqual(10, self.conf.database.min_pool_size)
         self.assertEqual(20, self.conf.database.max_pool_size)
         self.assertEqual(30, self.conf.database.max_retries)
         self.assertEqual(40, self.conf.database.retry_interval)
@@ -75,7 +71,6 @@ pool_timeout=7
         path = self.create_tempfiles([['tmp', b'[DATABASE]\n'
                                        b'sql_connection=fake_connection\n'
                                        b'sql_idle_timeout=100\n'
-                                       b'sql_min_pool_size=99\n'
                                        b'sql_max_pool_size=199\n'
                                        b'sql_max_retries=22\n'
                                        b'reconnect_interval=17\n'
@@ -86,7 +81,6 @@ pool_timeout=7
         self.assertEqual('fake_connection', self.conf.database.connection)
         self.assertEqual(100, self.conf.database.connection_recycle_time)
         self.assertEqual(100, self.conf.database.idle_timeout)
-        self.assertEqual(99, self.conf.database.min_pool_size)
         self.assertEqual(199, self.conf.database.max_pool_size)
         self.assertEqual(22, self.conf.database.max_retries)
         self.assertEqual(17, self.conf.database.retry_interval)

releasenotes/notes/removed-deprecated-min-pool-size-1f351d79fe232129.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    Removed deprecated database option ``min_pool_size``.
+
+    This option had no effect and was deprecated in Rocky. For more
+    information see bug `1764786 <https://bugs.launchpad.net/oslo.db/+bug/1764786>`_.