Remove Python 3.8 support

Python 3.8 is no longer part of the tested runtimes for 2024.2[1]
because its EOL is coming soon.

[1] https://governance.openstack.org/tc/reference/runtimes/2024.2.html

This allows us to replace md5 method from oslo.utils, which is being
deprecated now[2].

[2] https://review.opendev.org/c/openstack/oslo.utils/+/930879

Change-Id: I57328bb55ac88acb21048dd5eda797a419963f29

designate/storage/sqlalchemy/__init__.py

@@ -13,8 +13,9 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
+import hashlib
+
 from oslo_log import log as logging
-from oslo_utils.secretutils import md5
 from oslo_utils import timeutils
 from sqlalchemy import case, select, distinct, func
 from sqlalchemy.sql.expression import or_, literal_column
@@ -1178,7 +1179,7 @@ class SQLAlchemyStorage(base.SQLAlchemy):
         """
         Calculates the hash of the record, used to ensure record uniqueness.
         """
-        md5sum = md5(usedforsecurity=False)
+        md5sum = hashlib.md5(usedforsecurity=False)
         md5sum.update(('{}:{}'.format(record.recordset_id,
                                       record.data)).encode('utf-8'))
 

releasenotes/notes/remove-py38-28e9b2f3df6af4ac.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Support for Python 3.8 has been removed. Now the minimum python version
+    supported is 3.9 .

setup.cfg

@@ -6,7 +6,7 @@ long_description = file: README.rst
 author = OpenStack
 author_email = openstack-discuss@lists.openstack.org
 url = https://docs.openstack.org/designate/latest/
-python_requires = >=3.8
+python_requires = >=3.9
 classifiers =
     Environment :: OpenStack
     Environment :: No Input/Output (Daemon)
@@ -18,7 +18,6 @@ classifiers =
     Programming Language :: Python :: Implementation :: CPython
     Programming Language :: Python :: 3 :: Only
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11