Deprecated support for Windows OS

As was discussed in Neutron team meeting [1], we are going to deprecated
support for running Neutron on Windows OS in 2023.2 cycle and remove it
in 2024.2.
This decision was made due to the fact that the only company who was
behind Winstackers project and was maintaining this Windows support in
Neutron is no longer interested in maintaining it [2].

Closes-Bug: #2015844

[1] https://meetings.opendev.org/meetings/networking/2023/networking.2023-04-18-14.01.log.html#l-66
[2] https://lists.openstack.org/pipermail/openstack-discuss/2022-November/031044.html

Change-Id: I687204d83c6b2e404785bcdec42e80f2b0e8ac2b

neutron/agent/common/ip_lib.py

@@ -15,6 +15,9 @@
 
 import os
 
+from oslo_log import log as logging
+
+
 if os.name == 'nt':
     from neutron.agent.windows import ip_lib
     from neutron.conf.agent import windows
@@ -25,6 +28,12 @@ else:
     OPTS = linux.IP_LIB_OPTS_LINUX
 
 
+if os.name == 'nt':
+    LOG = logging.getLogger(__name__)
+    LOG.warning("Support for Neutron on Windows operating systems "
+                "is deprecated since 2023.2 release and will be removed in "
+                "2024.2 OpenStack release.")
+
 IPWrapper = ip_lib.IPWrapper
 IPDevice = ip_lib.IPDevice
 

releasenotes/notes/Deprecate-support-for-Windows-OS-80e32ef7e5e05b44.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    Support for Neutron on Windows operating systems is deprecated since 2023.2
+    release and will be removed in 2024.2.