Merge pull request #93 from linkernetworks/johnlin/gen-brName

VX-171 generate bridge name

Former-commit-id: 147019501bd8c5d46728e992d11ca986dc205927 [formerly 147019501bd8c5d46728e992d11ca986dc205927 [formerly ade8804]]
Former-commit-id: 9a791865573718f22e42134fa9bd200adf3da64c
Former-commit-id: 1617a82

src/networkprovider/network.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/linkernetworks/vortex/src/entity"
 	"github.com/linkernetworks/vortex/src/serviceprovider"
+	"github.com/linkernetworks/vortex/src/utils"
 )
 
 type NetworkProvider interface {
@@ -30,3 +31,9 @@ func GetNetworkProvider(network *entity.Network) (NetworkProvider, error) {
 		return nil, fmt.Errorf("unsupported Network Type %s", network.Type)
 	}
 }
+
+func GenerateBridgeName(datapathType, networkName string) string {
+	tmp := fmt.Sprintf("%s%s", datapathType, networkName)
+	str := utils.SHA256String(tmp)
+	return fmt.Sprintf("ovs-%s-%s", datapathType, str[0:6])
+}

src/networkprovider/network_test.go

@@ -39,3 +39,8 @@ func TestGetNetworkProviderFail(t *testing.T) {
 		})
 	assert.Error(t, err)
 }
+
+func TestGenerateBridgeName(t *testing.T) {
+	ans := GenerateBridgeName("netdev", "my network 1")
+	assert.Equal(t, "ovs-netdev-de0165", ans)
+}

src/server/handler_network.go

@@ -25,6 +25,9 @@ func createNetworkHandler(ctx *web.Context) {
 		return
 	}
 
+	// overwrite the bridge name
+	network.BridgeName = np.GenerateBridgeName(string(network.Type), network.Name)
+
 	session := sp.Mongo.NewSession()
 	defer session.Close()
 	session.C(entity.NetworkCollectionName).EnsureIndex(

src/utils/utils.go

@@ -0,0 +1,14 @@
+package utils
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+)
+
+func SHA256String(str string) string {
+	hash := sha256.New()
+	hash.Write([]byte(str))
+	md := hash.Sum(nil)
+	return fmt.Sprintf("%s", hex.EncodeToString(md))
+}

src/utils/utils_test.go

@@ -0,0 +1,12 @@
+package utils
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSHA256String(t *testing.T) {
+	o := SHA256String("12345678")
+	assert.Equal(t, "ef797c8118f02dfb649607dd5d3f8c7623048c9c063d532cc95c5ed7a898a64f", o)
+}