Add tags support for Neutron networks

This allows us to set/get tags for networks via terraform templates,
and requires the recently added changes to gophercloud that enable
the relevant features of the Neutron APIs to be accessed.

Issue: #453

openstack/resource_openstack_networking_network_v2.go

@@ -10,6 +10,7 @@ import (
 	"github.com/hashicorp/terraform/helper/schema"
 
 	"github.com/gophercloud/gophercloud"
+	"github.com/gophercloud/gophercloud/openstack/networking/v2/extensions/attributestags"
 	"github.com/gophercloud/gophercloud/openstack/networking/v2/extensions/external"
 	"github.com/gophercloud/gophercloud/openstack/networking/v2/extensions/provider"
 	"github.com/gophercloud/gophercloud/openstack/networking/v2/networks"
@@ -95,6 +96,11 @@ func resourceNetworkingNetworkV2() *schema.Resource {
 				Optional: true,
 				ForceNew: true,
 			},
+			"tags": &schema.Schema{
+				Type:     schema.TypeSet,
+				Optional: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
 			"availability_zone_hints": &schema.Schema{
 				Type:     schema.TypeList,
 				Computed: true,
@@ -180,6 +186,16 @@ func resourceNetworkingNetworkV2Create(d *schema.ResourceData, meta interface{})
 
 	log.Printf("[INFO] Network ID: %s", n.ID)
 
+	tags := networkV2AttributesTags(d)
+	if len(tags) > 0 {
+		tagOpts := attributestags.ReplaceAllOpts{Tags: tags}
+		tags, err := attributestags.ReplaceAll(networkingClient, "networks", n.ID, tagOpts).Extract()
+		if err != nil {
+			return fmt.Errorf("Error creating Tags on Network: %s", err)
+		}
+		log.Printf("[INFO] Set Tags = %+v on Network %+v", tags, n.ID)
+	}
+
 	log.Printf("[DEBUG] Waiting for Network (%s) to become available", n.ID)
 
 	stateConf := &resource.StateChangeConf{
@@ -222,6 +238,7 @@ func resourceNetworkingNetworkV2Read(d *schema.ResourceData, meta interface{}) e
 	d.Set("external", strconv.FormatBool(n.External))
 	d.Set("tenant_id", n.TenantID)
 	d.Set("region", GetRegion(d, config))
+	d.Set("tags", n.Tags)
 
 	if err := d.Set("availability_zone_hints", n.AvailabilityZoneHints); err != nil {
 		log.Printf("[DEBUG] unable to set availability_zone_hints: %s", err)
@@ -241,6 +258,15 @@ func resourceNetworkingNetworkV2Update(d *schema.ResourceData, meta interface{})
 	if d.HasChange("name") {
 		updateOpts.Name = d.Get("name").(string)
 	}
+	if d.HasChange("tags") {
+		tags := networkV2AttributesTags(d)
+		tagOpts := attributestags.ReplaceAllOpts{Tags: tags}
+		tags, err := attributestags.ReplaceAll(networkingClient, "networks", d.Id(), tagOpts).Extract()
+		if err != nil {
+			return fmt.Errorf("Error updating Tags on Network: %s", err)
+		}
+		log.Printf("[INFO] Updated Tags = %+v on Network %+v", tags, d.Id())
+	}
 	if d.HasChange("admin_state_up") {
 		asuRaw := d.Get("admin_state_up").(string)
 		if asuRaw != "" {

openstack/resource_openstack_networking_network_v2_test.go

@@ -40,6 +40,32 @@ func TestAccNetworkingV2Network_basic(t *testing.T) {
 	})
 }
 
+func TestAccNetworkingV2Network_tags(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckNetworkingV2NetworkDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccNetworkingV2Network_tags,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckNetworkingV2Tags(
+						"openstack_networking_network_v2.network_1",
+						"tags", []string{"a", "b", "c"}),
+				),
+			},
+			resource.TestStep{
+				Config: testAccNetworkingV2Network_tags_update,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckNetworkingV2Tags(
+						"openstack_networking_network_v2.network_1",
+						"tags", []string{"a", "b", "c", "d"}),
+				),
+			},
+		},
+	})
+}
+
 func TestAccNetworkingV2Network_netstack(t *testing.T) {
 	var network networks.Network
 	var subnet subnets.Subnet
@@ -248,6 +274,22 @@ resource "openstack_networking_network_v2" "network_1" {
 }
 `
 
+const testAccNetworkingV2Network_tags = `
+resource "openstack_networking_network_v2" "network_1" {
+  name = "network_1"
+  admin_state_up = "true"
+  tags = ["a", "b", "c"]
+}
+`
+
+const testAccNetworkingV2Network_tags_update = `
+resource "openstack_networking_network_v2" "network_1" {
+  name = "network_1"
+  admin_state_up = "true"
+  tags = ["a", "b", "c", "d"]
+}
+`
+
 const testAccNetworkingV2Network_netstack = `
 resource "openstack_networking_network_v2" "network_1" {
   name = "network_1"