GraceTermination when GameServer get deleted

pkg/sdkserver/sdkserver.go

@@ -342,6 +342,16 @@ func (s *SDKServer) updateState(ctx context.Context) error {
 	// If we are currently in shutdown/being deleted, there is no escaping.
 	if gs.IsBeingDeleted() {
 		s.logger.Debug("GameServerState being shutdown. Skipping update.")
+
+		// Explicitly update gsStateChannel if current state is Shutdown since sendGameServerUpdate will not triggered.
+		if runtime.FeatureEnabled(runtime.FeatureSDKGracefulTermination) {
+			if s.gsState == agonesv1.GameServerStateShutdown && gs.Status.State != agonesv1.GameServerStateShutdown {
+				go func() {
+					s.gsStateChannel <- agonesv1.GameServerStateShutdown
+				}()
+			}
+		}
+
 		return nil
 	}