provider/openstack: Fix Access Address Detection

This commit fixes how access ip addresses are detected. The previous
logic used was flawed and would detect the IPs in the wrong order.

builtin/providers/openstack/resource_openstack_compute_instance_v2.go

@@ -1009,25 +1009,33 @@ func getInstanceAccessAddresses(d *schema.ResourceData, networks []map[string]in
 		hostv4 = floatingIP
 	}
 
-	// Loop through all networks and check for the following:
-	// * If the network is set as an access network.
-	// * If the network has a floating IP.
-	// * If the network has a v4/v6 fixed IP.
+	// Loop through all networks
+	// If the network has a valid floating, fixed v4, or fixed v6 address
+	// and hostv4 or hostv6 is not set, set hostv4/hostv6.
+	// If the network is an "access_network" overwrite hostv4/hostv6.
 	for _, n := range networks {
-		if n["floating_ip"] != nil {
-			hostv4 = n["floating_ip"].(string)
-		} else {
-			if hostv4 == "" && n["fixed_ip_v4"] != nil {
-				hostv4 = n["fixed_ip_v4"].(string)
+		var accessNetwork bool
+
+		if an, ok := n["access_network"].(bool); ok && an {
+			accessNetwork = true
+		}
+
+		if fixedIPv4, ok := n["fixed_ip_v4"].(string); ok && fixedIPv4 != "" {
+			if hostv4 == "" || accessNetwork {
+				hostv4 = fixedIPv4
 			}
 		}
 
-		if hostv6 == "" && n["fixed_ip_v6"] != nil {
-			hostv6 = n["fixed_ip_v6"].(string)
+		if floatingIP, ok := n["floating_ip"].(string); ok && floatingIP != "" {
+			if hostv4 == "" || accessNetwork {
+				hostv4 = floatingIP
+			}
 		}
 
-		if an, ok := n["access_network"].(bool); ok && an {
-			break
+		if fixedIPv6, ok := n["fixed_ip_v6"].(string); ok && fixedIPv6 != "" {
+			if hostv6 == "" || accessNetwork {
+				hostv6 = fixedIPv6
+			}
 		}
 	}
 

builtin/providers/openstack/resource_openstack_compute_instance_v2_test.go

@@ -503,6 +503,60 @@ func TestAccComputeV2Instance_multiEphemeral(t *testing.T) {
 	})
 }
 
+func TestAccComputeV2Instance_accessIPv4(t *testing.T) {
+	var instance servers.Server
+	var testAccComputeV2Instance_accessIPv4 = fmt.Sprintf(`
+		resource "openstack_compute_floatingip_v2" "myip" {
+		}
+
+		resource "openstack_networking_network_v2" "network_1" {
+			name = "network_1"
+		}
+
+		resource "openstack_networking_subnet_v2" "subnet_1" {
+			name = "subnet_1"
+			network_id = "${openstack_networking_network_v2.network_1.id}"
+			cidr = "192.168.1.0/24"
+			ip_version = 4
+			enable_dhcp = true
+			no_gateway = true
+		}
+
+		resource "openstack_compute_instance_v2" "instance_1" {
+			depends_on = ["openstack_networking_subnet_v2.subnet_1"]
+
+			name = "instance_1"
+			security_groups = ["default"]
+			floating_ip = "${openstack_compute_floatingip_v2.myip.address}"
+
+			network {
+				uuid = "%s"
+			}
+
+			network {
+				uuid = "${openstack_networking_network_v2.network_1.id}"
+				fixed_ip_v4 = "192.168.1.100"
+				access_network = true
+			}
+		}`, os.Getenv("OS_NETWORK_ID"))
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeV2InstanceDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccComputeV2Instance_accessIPv4,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeV2InstanceExists(t, "openstack_compute_instance_v2.instance_1", &instance),
+					resource.TestCheckResourceAttr(
+						"openstack_compute_instance_v2.instance_1", "access_ip_v4", "192.168.1.100"),
+				),
+			},
+		},
+	})
+}
+
 func testAccCheckComputeV2InstanceDestroy(s *terraform.State) error {
 	config := testAccProvider.Meta().(*Config)
 	computeClient, err := config.computeV2Client(OS_REGION_NAME)