Revert "Moves supported python runtimes from version 3.8 to 3.10"

This reverts commit 4a18ae10b8d2dc164b4607fcd0728bb24516a723.

Keeping Python 3.10 in setup.cfg classifier and testing py38 min and
py310 max version.

Reason for revert:

Needed-By: https://review.opendev.org/c/openstack/openstack-zuul-jobs/+/882175

TC has been discussing about re-adding the python 3.8
testing in current master 2023.2 release testing.

- https://meetings.opendev.org/meetings/tc/2023/tc.2023-04-25-18.00.log.html#l-191
- https://lists.openstack.org/pipermail/openstack-discuss/2023-April/033469.html

While governance changes are under review, TC agreed to add py3.8 testing
so that we do not see more project/lib dropping python 3.8 and make them
uninstalable on python 3.8

- https://meetings.opendev.org/meetings/tc/2023/tc.2023-05-02-18.00.log.html#l-17
- https://review.opendev.org/c/openstack/governance/+/882165

Also adding py3.8 testing back in job https://review.opendev.org/c/openstack/openstack-zuul-jobs/+/882175

Change-Id: I18508891947649aa0a696372f71877c87b5c387e

2 files changed, 56 insertions, 55 deletions

diff --git a/.zuul.yaml b/.zuul.yaml
index b1f3662..9122fba 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -8,120 +8,120 @@
       - release-notes-jobs-python3
     check:
       jobs:
-        - tooz-tox-py39-etcd
+        - tooz-tox-py38-etcd
         - tooz-tox-py310-etcd
-        - tooz-tox-py39-etcd3gw
+        - tooz-tox-py38-etcd3gw
         - tooz-tox-py310-etcd3gw
-        - tooz-tox-py39-zookeeper
+        - tooz-tox-py38-zookeeper
         - tooz-tox-py310-zookeeper
-        - tooz-tox-py39-redis
+        - tooz-tox-py38-redis
         - tooz-tox-py310-redis
-        - tooz-tox-py39-sentinel
+        - tooz-tox-py38-sentinel
         - tooz-tox-py310-sentinel
-        - tooz-tox-py39-memcached
+        - tooz-tox-py38-memcached
         - tooz-tox-py310-memcached
-        - tooz-tox-py39-postgresql
+        - tooz-tox-py38-postgresql
         - tooz-tox-py310-postgresql
-        - tooz-tox-py39-mysql
+        - tooz-tox-py38-mysql
         - tooz-tox-py310-mysql
-        - tooz-tox-py39-consul
+        - tooz-tox-py38-consul
         - tooz-tox-py310-consul
     gate:
       jobs:
-        - tooz-tox-py39-etcd
+        - tooz-tox-py38-etcd
         - tooz-tox-py310-etcd
-        - tooz-tox-py39-etcd3gw
+        - tooz-tox-py38-etcd3gw
         - tooz-tox-py310-etcd3gw
-        - tooz-tox-py39-zookeeper
+        - tooz-tox-py38-zookeeper
         - tooz-tox-py310-zookeeper
-        - tooz-tox-py39-redis
+        - tooz-tox-py38-redis
         - tooz-tox-py310-redis
-        - tooz-tox-py39-sentinel
+        - tooz-tox-py38-sentinel
         - tooz-tox-py310-sentinel
-        - tooz-tox-py39-memcached
+        - tooz-tox-py38-memcached
         - tooz-tox-py310-memcached
-        - tooz-tox-py39-postgresql
+        - tooz-tox-py38-postgresql
         - tooz-tox-py310-postgresql
-        - tooz-tox-py39-mysql
+        - tooz-tox-py38-mysql
         - tooz-tox-py310-mysql
-        - tooz-tox-py39-consul
+        - tooz-tox-py38-consul
         - tooz-tox-py310-consul
 
 - job:
-    name: tooz-tox-py39-consul
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-consul
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-consul`` environment.
+      Run tests using ``py38-consul`` environment.
     vars:
-      tox_envlist: py39-consul
+      tox_envlist: py38-consul
 
 - job:
-    name: tooz-tox-py39-etcd
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-etcd
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-etcd`` environment.
+      Run tests using ``py38-etcd`` environment.
     vars:
-      tox_envlist: py39-etcd
+      tox_envlist: py38-etcd
 
 - job:
-    name: tooz-tox-py39-etcd3gw
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-etcd3gw
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-etcd3gw`` environment.
+      Run tests using ``py38-etcd3gw`` environment.
     vars:
-      tox_envlist: py39-etcd3gw
+      tox_envlist: py38-etcd3gw
 
 - job:
-    name: tooz-tox-py39-memcached
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-memcached
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-memcached`` environment.
+      Run tests using ``py38-memcached`` environment.
     vars:
-      tox_envlist: py39-memcached
+      tox_envlist: py38-memcached
 
 - job:
-    name: tooz-tox-py39-mysql
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-mysql
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-mysql`` environment.
+      Run tests using ``py38-mysql`` environment.
     vars:
-      tox_envlist: py39-mysql
+      tox_envlist: py38-mysql
 
 - job:
-    name: tooz-tox-py39-postgresql
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-postgresql
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-postgresql`` environment.
+      Run tests using ``py38-postgresql`` environment.
     vars:
-      tox_envlist: py39-postgresql
+      tox_envlist: py38-postgresql
 
 - job:
-    name: tooz-tox-py39-redis
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-redis
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-redis`` environment.
+      Run tests using ``py38-redis`` environment.
     vars:
-      tox_envlist: py39-redis
+      tox_envlist: py38-redis
     pre-run:
       - playbooks/stop-redis.yaml
 
 - job:
-    name: tooz-tox-py39-sentinel
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-sentinel
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-sentinel`` environment.
+      Run tests using ``py38-sentinel`` environment.
     vars:
-      tox_envlist: py39-sentinel
+      tox_envlist: py38-sentinel
     pre-run:
       - playbooks/stop-redis.yaml
 
 - job:
-    name: tooz-tox-py39-zookeeper
-    parent: openstack-tox-py39
+    name: tooz-tox-py38-zookeeper
+    parent: openstack-tox-py38
     description: |
-      Run tests using ``py39-zookeeper`` environment.
+      Run tests using ``py38-zookeeper`` environment.
     vars:
-      tox_envlist: py39-zookeeper
+      tox_envlist: py38-zookeeper
 
 - job:
     name: tooz-tox-py310-consul
diff --git a/setup.cfg b/setup.cfg
index e26dde8..e5740fc 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,7 +6,7 @@ summary = Coordination library for distributed systems.
 description_file = README.rst
 license = Apache-2
 home_page = https://docs.openstack.org/tooz/latest/
-python_requires = >=3.9
+python_requires = >=3.8
 classifier =
     Environment :: OpenStack
     Intended Audience :: Developers
@@ -15,6 +15,7 @@ classifier =
     Operating System :: POSIX :: Linux
     Programming Language :: Python
     Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3 :: Only