move Labels from array to map to be consistent with cotnainers

Signed-off-by: Madhu Venugopal <madhu@docker.com>

api/api.go

@@ -278,7 +278,11 @@ func procCreateNetwork(c libnetwork.NetworkController, vars map[string]string, b
 	}
 	processCreateDefaults(c, &create)
 
-	nw, err := c.NewNetwork(create.NetworkType, create.Name, libnetwork.NetworkOptionLabels(create.Labels))
+	options := []libnetwork.NetworkOption{}
+	if len(create.Labels) > 0 {
+		options = append(options, libnetwork.NetworkOptionLabels(create.Labels))
+	}
+	nw, err := c.NewNetwork(create.NetworkType, create.Name, options...)
 	if err != nil {
 		return "", convertNetworkError(err)
 	}

api/api_test.go

@@ -225,9 +225,9 @@ func TestCreateDeleteNetwork(t *testing.T) {
 		t.Fatalf("Expected StatusBadRequest status code, got: %v", errRsp)
 	}
 
-	ops := []string{
-		bridge.BridgeName + "=abc",
-		netlabel.EnableIPv6 + "=true",
+	ops := map[string]string{
+		bridge.BridgeName:   "abc",
+		netlabel.EnableIPv6: "true",
 	}
 	nc := networkCreate{Name: "network_1", NetworkType: bridgeNetType, Labels: ops}
 	goodBody, err := json.Marshal(nc)
@@ -259,9 +259,9 @@ func TestCreateDeleteNetwork(t *testing.T) {
 	}
 
 	// Create with labels
-	labels := []string{
-		netlabel.EnableIPv6 + "=true",
-		bridge.BridgeName + "=abc",
+	labels := map[string]string{
+		netlabel.EnableIPv6: "true",
+		bridge.BridgeName:   "abc",
 	}
 	nc = networkCreate{Name: "network_2", NetworkType: bridgeNetType, Labels: labels}
 	goodBody, err = json.Marshal(nc)
@@ -294,8 +294,8 @@ func TestGetNetworksAndEndpoints(t *testing.T) {
 	}
 	defer c.Stop()
 
-	ops := []string{
-		bridge.BridgeName + "=api_test_nw",
+	ops := map[string]string{
+		bridge.BridgeName: "api_test_nw",
 	}
 	nc := networkCreate{Name: "sh", NetworkType: bridgeNetType, Labels: ops}
 	body, err := json.Marshal(nc)
@@ -1830,10 +1830,10 @@ func TestEndToEnd(t *testing.T) {
 
 	handleRequest := NewHTTPHandler(c)
 
-	ops := []string{
-		bridge.BridgeName + "=cdef",
-		netlabel.EnableIPv6 + "=true",
-		netlabel.DriverMTU + "=1460",
+	ops := map[string]string{
+		bridge.BridgeName:   "cdef",
+		netlabel.EnableIPv6: "true",
+		netlabel.DriverMTU:  "1460",
 	}
 
 	// Create network

api/types.go

@@ -34,9 +34,9 @@ type sandboxResource struct {
 
 // networkCreate is the expected body of the "create network" http request message
 type networkCreate struct {
-	Name        string   `json:"name"`
-	NetworkType string   `json:"network_type"`
-	Labels      []string `json:"labels"`
+	Name        string            `json:"name"`
+	NetworkType string            `json:"network_type"`
+	Labels      map[string]string `json:"labels"`
 }
 
 // endpointCreate represents the body of the "create endpoint" http request message

netlabel/labels.go

@@ -104,26 +104,3 @@ func KeyValue(label string) (key string, value string) {
 	}
 	return
 }
-
-// ToMap converts a list of labels in a map of (key,value) pairs
-func ToMap(labels []string) map[string]string {
-	m := make(map[string]string, len(labels))
-	for _, l := range labels {
-		k, v := KeyValue(l)
-		m[k] = v
-	}
-	return m
-}
-
-// FromMap converts a map of (key,value) pairs in a lsit of labels
-func FromMap(m map[string]string) []string {
-	l := make([]string, 0, len(m))
-	for k, v := range m {
-		s := k
-		if v != "" {
-			s = s + "=" + v
-		}
-		l = append(l, s)
-	}
-	return l
-}

netlabel/labels_test.go

@@ -28,50 +28,3 @@ func TestKeyValue(t *testing.T) {
 		}
 	}
 }
-
-func TestToMap(t *testing.T) {
-	lista := make([]string, len(input))
-	for ind, i := range input {
-		lista[ind] = i.label
-	}
-
-	mappa := ToMap(lista)
-
-	if len(mappa) != len(lista) {
-		t.Fatalf("Incorrect map length. Expected %d. Got %d", len(lista), len(mappa))
-	}
-
-	for _, i := range input {
-		if v, ok := mappa[i.key]; !ok || v != i.value {
-			t.Fatalf("Cannot find key or value for key: %s", i.key)
-		}
-	}
-}
-
-func TestFromMap(t *testing.T) {
-	var m map[string]string
-	lbls := FromMap(m)
-	if len(lbls) != 0 {
-		t.Fatalf("unexpected lbls length")
-	}
-
-	m = make(map[string]string, 3)
-	m["peso"] = "85"
-	m["statura"] = "170"
-	m["maschio"] = ""
-
-	lbls = FromMap(m)
-	if len(lbls) != 3 {
-		t.Fatalf("unexpected lbls length")
-	}
-
-	for _, l := range lbls {
-		switch l {
-		case "peso=85":
-		case "statura=170":
-		case "maschio":
-		default:
-			t.Fatalf("unexpected label: %s", l)
-		}
-	}
-}

network.go

@@ -57,7 +57,7 @@ type Network interface {
 
 // NetworkInfo returns operational information about the network
 type NetworkInfo interface {
-	Labels() []string
+	Labels() map[string]string
 	Scope() string
 }
 
@@ -472,16 +472,15 @@ func NetworkOptionIpam(ipamDriver string, addrSpace string, ipV4 []*IpamConf, ip
 }
 
 // NetworkOptionLabels function returns an option setter for any parameter described by a map
-func NetworkOptionLabels(labels []string) NetworkOption {
+func NetworkOptionLabels(labels map[string]string) NetworkOption {
 	return func(n *network) {
 		if n.generic == nil {
 			n.generic = make(map[string]interface{})
 		}
-		opts := netlabel.ToMap(labels)
 		// Store the options
-		n.generic[netlabel.GenericData] = opts
+		n.generic[netlabel.GenericData] = labels
 		// Decode and store the endpoint options of libnetwork interest
-		if val, ok := opts[netlabel.EnableIPv6]; ok {
+		if val, ok := labels[netlabel.EnableIPv6]; ok {
 			var err error
 			if n.enableIPv6, err = strconv.ParseBool(val); err != nil {
 				log.Warnf("Failed to parse %s' value: %s (%s)", netlabel.EnableIPv6, val, err.Error())
@@ -1047,15 +1046,15 @@ func (n *network) Info() NetworkInfo {
 	return n
 }
 
-func (n *network) Labels() []string {
+func (n *network) Labels() map[string]string {
 	n.Lock()
 	defer n.Unlock()
 	if n.generic != nil {
 		if m, ok := n.generic[netlabel.GenericData]; ok {
-			return netlabel.FromMap(m.(map[string]string))
+			return m.(map[string]string)
 		}
 	}
-	return []string{}
+	return map[string]string{}
 }
 
 func (n *network) Scope() string {