Merge branch 'v1.7' into master

server/server.go

@@ -163,6 +163,22 @@ func (s serverEntryPoint) Shutdown(ctx context.Context) {
 	wg.Wait()
 }
 
+// tcpKeepAliveListener sets TCP keep-alive timeouts on accepted
+// connections.
+type tcpKeepAliveListener struct {
+	*net.TCPListener
+}
+
+func (ln tcpKeepAliveListener) Accept() (net.Conn, error) {
+	tc, err := ln.AcceptTCP()
+	if err != nil {
+		return nil, err
+	}
+	tc.SetKeepAlive(true)
+	tc.SetKeepAlivePeriod(3 * time.Minute)
+	return tc, nil
+}
+
 // NewServer returns an initialized Server.
 func NewServer(globalConfiguration configuration.GlobalConfiguration, provider provider.Provider, entrypoints map[string]EntryPoint) *Server {
 	server := &Server{}
@@ -549,6 +565,8 @@ func (s *Server) prepareServer(entryPointName string, entryPoint *configuration.
 		return nil, nil, fmt.Errorf("error opening listener: %v", err)
 	}
 
+	listener = tcpKeepAliveListener{listener.(*net.TCPListener)}
+
 	if entryPoint.ProxyProtocol != nil {
 		listener, err = buildProxyProtocolListener(entryPoint, listener)
 		if err != nil {