Add support for host ip binding to the API (and kubelet)

pkg/api/types.go

@@ -74,6 +74,8 @@ type Port struct {
 	ContainerPort int `yaml:"containerPort" json:"containerPort"`
 	// Optional: Defaults to "TCP".
 	Protocol string `yaml:"protocol,omitempty" json:"protocol,omitempty"`
+	// Optional: What host IP to bind the external port to.
+	HostIP string `yaml:"hostIP,omitempty" json:"hostIP,omitempty"`
 }
 
 // VolumeMount describes a mounting of a Volume within a container
@@ -86,7 +88,7 @@ type VolumeMount struct {
 	// Exactly one of the following must be set.  If both are set, prefer MountPath.
 	// DEPRECATED: Path will be removed in a future version of the API.
 	MountPath string `yaml:"mountPath,omitempty" json:"mountPath,omitempty"`
-	Path string `yaml:"path,omitempty" json:"path,omitempty"`
+	Path      string `yaml:"path,omitempty" json:"path,omitempty"`
 	// One of: "LOCAL" (local volume) or "HOST" (external mount from the host). Default: LOCAL.
 	MountType string `yaml:"mountType,omitempty" json:"mountType,omitempty"`
 }

pkg/kubelet/kubelet.go

@@ -332,6 +332,7 @@ func makePortsAndBindings(container *api.Container) (map[docker.Port]struct{}, m
 		portBindings[dockerPort] = []docker.PortBinding{
 			{
 				HostPort: strconv.Itoa(exteriorPort),
+				HostIp:   port.HostIP,
 			},
 		}
 	}

pkg/kubelet/kubelet_test.go

@@ -529,6 +529,7 @@ func TestMakePortsAndBindings(t *testing.T) {
 			{
 				ContainerPort: 80,
 				HostPort:      8080,
+				HostIP:        "127.0.0.1",
 			},
 			{
 				ContainerPort: 443,
@@ -558,18 +559,30 @@ func TestMakePortsAndBindings(t *testing.T) {
 			if !reflect.DeepEqual(docker.Port("80/tcp"), key) {
 				t.Errorf("Unexpected docker port: %#v", key)
 			}
+			if value[0].HostIp != "127.0.0.1" {
+				t.Errorf("Unexpected host IP: %s", value[0].HostIp)
+			}
 		case "443":
 			if !reflect.DeepEqual(docker.Port("443/tcp"), key) {
 				t.Errorf("Unexpected docker port: %#v", key)
 			}
+			if value[0].HostIp != "" {
+				t.Errorf("Unexpected host IP: %s", value[0].HostIp)
+			}
 		case "444":
 			if !reflect.DeepEqual(docker.Port("444/udp"), key) {
 				t.Errorf("Unexpected docker port: %#v", key)
 			}
+			if value[0].HostIp != "" {
+				t.Errorf("Unexpected host IP: %s", value[0].HostIp)
+			}
 		case "445":
 			if !reflect.DeepEqual(docker.Port("445/tcp"), key) {
 				t.Errorf("Unexpected docker port: %#v", key)
 			}
+			if value[0].HostIp != "" {
+				t.Errorf("Unexpected host IP: %s", value[0].HostIp)
+			}
 		}
 	}
 }