Drop Python 3.10

Python 3.11 is the minimum runtime for 2026.2 (Hibiscus). We also add
the marker for Python 3.13 since we test this in CI. We may eventually
wish to drop these markers since they duplicate information provided by
`requires_python`.

https://governance.openstack.org/tc/reference/runtimes/2026.2.html

Change-Id: I3358a2c9ad2e59765537cbeb124f51d7207461de
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

Author: stephenfin

.zuul.yaml

@@ -2,12 +2,12 @@
 # for job naming conventions.
 
 - job:
-    name: nova-tox-functional-py310
-    parent: openstack-tox-functional-py310
+    name: nova-tox-functional-py311
+    parent: openstack-tox-functional-py311
     description: |
       Run tox-based functional tests for the OpenStack Nova project
       under cPython version 3.10 with Nova specific irrelevant-files list.
-      Uses tox with the ``functional-py310`` environment.
+      Uses tox with the ``functional-py311`` environment.
 
       This job also provides a parent for other projects to run the nova
       functional tests on their own changes.
@@ -26,7 +26,7 @@
       # explicitly stating the work dir makes this job reusable by other
       # projects
       zuul_work_dir: src/opendev.org/openstack/nova
-      bindep_profile: test py310
+      bindep_profile: test py311
     timeout: 3600
 
 - job:
@@ -948,7 +948,7 @@
         - nova-alt-configurations
         - nova-tox-validate-backport:
             voting: false
-        - nova-tox-functional-py310
+        - nova-tox-functional-py311
         - nova-tox-functional-py313
         - tempest-integrated-compute:
            # NOTE(gmann): Policies changes do not need to run all the
@@ -977,7 +977,7 @@
     gate:
       jobs:
         - nova-live-migration
-        - nova-tox-functional-py310
+        - nova-tox-functional-py311
         - nova-tox-functional-py313
         - nova-multi-cell
         - nova-next

pyproject.toml

@@ -11,7 +11,7 @@ authors = [
 readme = {file = "README.rst", content-type = "text/x-rst"}
 license = {text = "Apache-2.0"}
 dynamic = ["version", "dependencies"]
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Environment :: OpenStack",
@@ -21,9 +21,9 @@ classifiers = [
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: Implementation :: CPython",
 ]

releasenotes/notes/drop-python-3-10-5dd06071c4ebd55e.yaml

@@ -0,0 +1,5 @@
+---
+upgrade:
+  - |
+    Python 3.10 support has been dropped. The minimum version of Python now
+    supported by nova is Python 3.11.