Support ipv6_addresses for data_source_aws_instance

.changelog/17859.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+data-source/aws_instance: Add `ipv6_addresses` attribute
+```

aws/data_source_aws_instance.go

@@ -93,6 +93,11 @@ func dataSourceAwsInstance() *schema.Resource {
 				Computed: true,
 				Elem:     &schema.Schema{Type: schema.TypeString},
 			},
+			"ipv6_addresses": {
+				Type:     schema.TypeSet,
+				Computed: true,
+				Elem:     &schema.Schema{Type: schema.TypeString},
+			},
 			"iam_instance_profile": {
 				Type:     schema.TypeString,
 				Computed: true,
@@ -489,6 +494,14 @@ func instanceDescriptionAttributes(d *schema.ResourceData, instance *ec2.Instanc
 				if err := d.Set("secondary_private_ips", secondaryIPs); err != nil {
 					return fmt.Errorf("error setting secondary_private_ips: %w", err)
 				}
+
+				ipV6Addresses := make([]string, 0, len(ni.Ipv6Addresses))
+				for _, ip := range ni.Ipv6Addresses {
+					ipV6Addresses = append(ipV6Addresses, aws.StringValue(ip.Ipv6Address))
+				}
+				if err := d.Set("ipv6_addresses", ipV6Addresses); err != nil {
+					return fmt.Errorf("error setting ipv6_addresses: %w", err)
+				}
 			}
 		}
 	} else {

aws/data_source_aws_instance_test.go

@@ -250,6 +250,28 @@ func TestAccAWSInstanceDataSource_secondaryPrivateIPs(t *testing.T) {
 	})
 }
 
+func TestAccAWSInstanceDataSource_ipv6Addresses(t *testing.T) {
+	resourceName := "aws_instance.test"
+	datasourceName := "data.aws_instance.test"
+	rName := acctest.RandomWithPrefix("tf-acc-test")
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:   func() { testAccPreCheck(t) },
+		ErrorCheck: testAccErrorCheck(t, ec2.EndpointsID),
+		Providers:  testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccInstanceDataSourceConfig_ipv6Addresses(rName),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrPair(datasourceName, "ami", resourceName, "ami"),
+					resource.TestCheckResourceAttrPair(datasourceName, "instance_type", resourceName, "instance_type"),
+					resource.TestCheckResourceAttrPair(datasourceName, "ipv6_addresses.#", resourceName, "ipv6_address_count"),
+				),
+			},
+		},
+	})
+}
+
 func TestAccAWSInstanceDataSource_keyPair(t *testing.T) {
 	resourceName := "aws_instance.test"
 	datasourceName := "data.aws_instance.test"
@@ -826,8 +848,27 @@ data "aws_instance" "test" {
 `)
 }
 
+func testAccInstanceDataSourceConfig_ipv6Addresses(rName string) string {
+	return composeConfig(testAccLatestAmazonLinuxHvmEbsAmiConfig(), testAccAwsInstanceVpcIpv6Config(rName), fmt.Sprintf(`
+resource "aws_instance" "test" {
+  ami                = data.aws_ami.amzn-ami-minimal-hvm-ebs.id
+  instance_type      = "t2.micro"
+  subnet_id          = aws_subnet.test.id
+  ipv6_address_count = 1
+
+  tags = {
+    Name = %[1]q
+  }
+}
+
+data "aws_instance" "test" {
+  instance_id = aws_instance.test.id
+}
+`, rName))
+}
+
 func testAccInstanceDataSourceConfig_keyPair(rName, publicKey string) string {
-	return testAccLatestAmazonLinuxHvmEbsAmiConfig() + fmt.Sprintf(`
+	return composeConfig(testAccLatestAmazonLinuxHvmEbsAmiConfig(), fmt.Sprintf(`
 resource "aws_key_pair" "test" {
   key_name   = %[1]q
   public_key = %[2]q
@@ -854,7 +895,7 @@ data "aws_instance" "test" {
     values = [aws_instance.test.key_name]
   }
 }
-`, rName, publicKey)
+`, rName, publicKey))
 }
 
 func testAccInstanceDataSourceConfig_VPC(rName string) string {