From 0b7b613bbaca1d43bb637bd99c04453f0119b20c Mon Sep 17 00:00:00 2001
From: "Dr. Stefan Schimanski" <sttts@redhat.com>
Date: Fri, 21 Oct 2016 16:03:50 +0200
Subject: [PATCH] Add BindNetwork to GenericApiServer.Config

---
 pkg/genericapiserver/config.go |  3 +++
 pkg/genericapiserver/serve.go  | 12 ++++++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/pkg/genericapiserver/config.go b/pkg/genericapiserver/config.go
index 44916181667..98c51b25f46 100644
--- a/pkg/genericapiserver/config.go
+++ b/pkg/genericapiserver/config.go
@@ -177,6 +177,9 @@ type Config struct {
 type ServingInfo struct {
 	// BindAddress is the ip:port to serve on
 	BindAddress string
+	// BindNetwork is the type of network to bind to - defaults to "tcp", accepts "tcp",
+	// "tcp4", and "tcp6".
+	BindNetwork string
 }
 
 type SecureServingInfo struct {
diff --git a/pkg/genericapiserver/serve.go b/pkg/genericapiserver/serve.go
index e595bf2812a..ec120b72bd3 100644
--- a/pkg/genericapiserver/serve.go
+++ b/pkg/genericapiserver/serve.go
@@ -89,7 +89,7 @@ func (s *GenericAPIServer) serveSecurely(stopCh <-chan struct{}) error {
 	}
 
 	glog.Infof("Serving securely on %s", s.SecureServingInfo.BindAddress)
-	s.effectiveSecurePort, err = runServer(secureServer, stopCh)
+	s.effectiveSecurePort, err = runServer(secureServer, s.SecureServingInfo.BindNetwork, stopCh)
 	return err
 }
 
@@ -104,19 +104,23 @@ func (s *GenericAPIServer) serveInsecurely(stopCh <-chan struct{}) error {
 	}
 	glog.Infof("Serving insecurely on %s", s.InsecureServingInfo.BindAddress)
 	var err error
-	s.effectiveInsecurePort, err = runServer(insecureServer, stopCh)
+	s.effectiveInsecurePort, err = runServer(insecureServer, s.InsecureServingInfo.BindNetwork, stopCh)
 	return err
 }
 
 // runServer listens on the given port, then spawns a go-routine continuously serving
 // until the stopCh is closed. The port is returned. This function does not block.
-func runServer(server *http.Server, stopCh <-chan struct{}) (int, error) {
+func runServer(server *http.Server, network string, stopCh <-chan struct{}) (int, error) {
 	if len(server.Addr) == 0 {
 		return 0, errors.New("address cannot be empty")
 	}
 
+	if len(network) == 0 {
+		network = "tcp"
+	}
+
 	// first listen is synchronous (fail early!)
-	ln, err := net.Listen("tcp", server.Addr)
+	ln, err := net.Listen(network, server.Addr)
 	if err != nil {
 		return 0, fmt.Errorf("failed to listen on %v: %v", server.Addr, err)
 	}