Bug: azurerm_dns_aaaa_record - Normalize IPv6 addresses

azurerm/helpers/azure/ipv6.go

@@ -0,0 +1,24 @@
+package azure
+
+import (
+	"net"
+
+	"github.com/hashicorp/terraform-plugin-sdk/helper/hashcode"
+)
+
+// NormalizeIPv6Address returns the normalized notation of an IPv6
+func NormalizeIPv6Address(ipv6 interface{}) string {
+	if ipv6 == nil || ipv6.(string) == "" {
+		return ""
+	}
+	r := net.ParseIP(ipv6.(string))
+	if r == nil {
+		return ""
+	}
+	return r.String()
+}
+
+// HashIPv6Address normalizes an IPv6 address and returns a hash for it
+func HashIPv6Address(ipv6 interface{}) int {
+	return hashcode.String(NormalizeIPv6Address(ipv6))
+}

azurerm/helpers/azure/ipv6_test.go

@@ -0,0 +1,84 @@
+package azure
+
+import "testing"
+
+func TestIPv6Compression(t *testing.T) {
+	cases := []struct {
+		Name   string
+		Input  interface{}
+		Output string
+		Valid  bool
+	}{
+		{
+			Name:   "input empty",
+			Input:  "",
+			Output: "",
+			Valid:  true,
+		},
+		{
+			Name:   "valid IPv6 input, invalid compression",
+			Input:  "2001:0db8:85a3:0:0:8a2e:0370:7334",
+			Output: "2001:0db8:85a3:0:0:8a2e:0370:7334",
+			Valid:  false,
+		},
+		{
+			Name:   "invalid IPv6 input",
+			Input:  "2001::invalid",
+			Output: "",
+			Valid:  false,
+		},
+		{
+			Name:   "valid IPv6 compression",
+			Input:  "2001:0db8:85a3:0:0:8a2e:0370:7334",
+			Output: "2001:db8:85a3::8a2e:370:7334",
+			Valid:  true,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.Name, func(t *testing.T) {
+			r := NormalizeIPv6Address(tc.Input)
+			if (r != tc.Output) && tc.Valid {
+				t.Fatalf("Expected NormalizeIPv6Address to return '%q' for '%q' (got '%q')", tc.Output, tc.Input, r)
+			}
+		})
+	}
+}
+
+func TestHashIPv6Address(t *testing.T) {
+	cases := []struct {
+		Name   string
+		Input  interface{}
+		Output int
+	}{
+		{
+			Name:   "input empty",
+			Input:  "",
+			Output: 0,
+		},
+		{
+			Name:   "uncompressed",
+			Input:  "2001:0db8:85a3:0:0:8a2e:0370:7334",
+			Output: 3242211790,
+		},
+		{
+			Name:   "invalid",
+			Input:  "2001::invalid",
+			Output: 0,
+		},
+		{
+			Name:   "compressed",
+			Input:  "2001:db8:85a3::8a2e:370:7334",
+			Output: 3242211790,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.Name, func(t *testing.T) {
+			r := HashIPv6Address(tc.Input)
+			if r != tc.Output {
+				t.Fatalf("Expected HashIPv6Address to return '%d' for '%q' (got '%d')", tc.Output, tc.Input, r)
+			}
+		})
+	}
+}

azurerm/internal/services/dns/resource_arm_dns_aaaa_record.go

@@ -9,6 +9,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/azure"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/tf"
+	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/validate"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/clients"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/features"
 	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/tags"
@@ -48,10 +49,13 @@ func resourceArmDnsAAAARecord() *schema.Resource {
 			},
 
 			"records": {
-				Type:          schema.TypeSet,
-				Optional:      true,
-				Elem:          &schema.Schema{Type: schema.TypeString},
-				Set:           schema.HashString,
+				Type:     schema.TypeSet,
+				Optional: true,
+				Elem: &schema.Schema{
+					Type:         schema.TypeString,
+					ValidateFunc: validate.IPv6Address,
+				},
+				Set:           azure.HashIPv6Address,
 				ConflictsWith: []string{"target_resource_id"},
 			},
 
@@ -211,7 +215,7 @@ func expandAzureRmDnsAaaaRecords(input []interface{}) *[]dns.AaaaRecord {
 	records := make([]dns.AaaaRecord, len(input))
 
 	for i, v := range input {
-		ipv6 := v.(string)
+		ipv6 := azure.NormalizeIPv6Address(v)
 		records[i] = dns.AaaaRecord{
 			Ipv6Address: &ipv6,
 		}
@@ -231,7 +235,7 @@ func flattenAzureRmDnsAaaaRecords(records *[]dns.AaaaRecord) []string {
 			continue
 		}
 
-		results = append(results, *record.Ipv6Address)
+		results = append(results, azure.NormalizeIPv6Address(*record.Ipv6Address))
 	}
 	return results
 }

azurerm/internal/services/dns/tests/resource_arm_dns_aaaa_record_test.go

@@ -200,6 +200,33 @@ func TestAccAzureRMDnsAaaaRecord_AliasToRecords(t *testing.T) {
 	})
 }
 
+func TestAccAzureRMDnsAAAARecord_uncompressed(t *testing.T) {
+	data := acceptance.BuildTestData(t, "azurerm_dns_aaaa_record", "test")
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:     func() { acceptance.PreCheck(t) },
+		Providers:    acceptance.SupportedProviders,
+		CheckDestroy: testCheckAzureRMDnsAaaaRecordDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccAzureRMDnsAAAARecord_uncompressed(data),
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMDnsAaaaRecordExists(data.ResourceName),
+					resource.TestCheckResourceAttrSet(data.ResourceName, "fqdn"),
+				),
+			},
+			{
+				Config: testAccAzureRMDnsAAAARecord_uncompressed(data), // just use the same for updating
+				Check: resource.ComposeTestCheckFunc(
+					testCheckAzureRMDnsAaaaRecordExists(data.ResourceName),
+					resource.TestCheckResourceAttr(data.ResourceName, "records.#", "2"),
+				),
+			},
+			data.ImportStep(),
+		},
+	})
+}
+
 func testCheckAzureRMDnsAaaaRecordExists(resourceName string) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		conn := acceptance.AzureProvider.Meta().(*clients.Client).Dns.RecordSetsClient
@@ -483,3 +510,25 @@ resource "azurerm_dns_aaaa_record" "test" {
 }
 `, data.RandomInteger, data.Locations.Primary, data.RandomInteger, data.RandomInteger)
 }
+
+func testAccAzureRMDnsAAAARecord_uncompressed(data acceptance.TestData) string {
+	return fmt.Sprintf(`
+resource "azurerm_resource_group" "test" {
+  name     = "acctestRG-%d"
+  location = "%s"
+}
+
+resource "azurerm_dns_zone" "test" {
+  name                = "acctestzone%d.com"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+}
+
+resource "azurerm_dns_aaaa_record" "test" {
+  name                = "myarecord%d"
+  resource_group_name = "${azurerm_resource_group.test.name}"
+  zone_name           = "${azurerm_dns_zone.test.name}"
+  ttl                 = 300
+  records             = ["2607:f8b0:4005:0800:0000:0000:0000:1003", "2201:1234:1234::1"]
+}
+`, data.RandomInteger, data.Locations.Primary, data.RandomInteger, data.RandomInteger)
+}