neutron: Add uwsgi start-time configuration

This commit adds the start-time configuration to the neutron chart's
uwsgi settings, set to "%t" which provides the unix timestamp at
instance startup. This parameter is required by ML2/OVN to create
OVN hash ring registers during the initialization process.

Related documentation:
https://docs.openstack.org/neutron/latest/admin/config-wsgi.html

Change-Id: Ib759026046979110187e5bfcbec78d6afaf15787
Assisted-by: Claude Sonnet 4.5
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>

neutron/values.yaml

@@ -1385,6 +1385,10 @@ conf:
       master: true
       procname-prefix-spaced: "neutron-api:"
       route-user-agent: '^kube-probe.* donotlog:'
+      # start-time provides unix time at instance startup, used by ML2/OVN
+      # for OVN hash ring registers. See:
+      # https://docs.openstack.org/neutron/latest/admin/config-wsgi.html
+      start-time: "%t"
       thunder-lock: true
       worker-reload-mercy: 80
       wsgi-file: /var/lib/openstack/bin/neutron-api

releasenotes/notes/neutron-add-uwsgi-start-time-d73ba462e1157dd2.yaml

@@ -0,0 +1,10 @@
+---
+neutron:
+  - |
+    Added uwsgi start-time configuration to neutron-api-uwsgi section. The
+    start-time parameter is set to "%t" (unix time at instance startup) and is
+    used by ML2/OVN for creating OVN hash ring registers per worker. This
+    configuration is mandatory for proper ML2/OVN operation. See the Neutron
+    documentation for more details:
+    https://docs.openstack.org/neutron/latest/admin/config-wsgi.html
+...