f/aws vpc network interface attachment import

.changelog/27364.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/aws_network_interface_attachment: Added import capabilities for the resource
+```

internal/service/ec2/find.go

@@ -1506,6 +1506,26 @@ func FindNetworkInterfacesByAttachmentInstanceOwnerIDAndDescriptionWithContext(c
 	return FindNetworkInterfacesWithContext(ctx, conn, input)
 }
 
+func FindNetworkInterfaceByAttachmentID(ctx context.Context, conn *ec2.EC2, id string) (*ec2.NetworkInterface, error) {
+	input := &ec2.DescribeNetworkInterfacesInput{
+		Filters: BuildAttributeFilterList(map[string]string{
+			"attachment.attachment-id": id,
+		}),
+	}
+
+	networkInterface, err := FindNetworkInterfaceWithContext(ctx, conn, input)
+
+	if err != nil {
+		return nil, err
+	}
+
+	if networkInterface == nil {
+		return nil, tfresource.NewEmptyResultError(input)
+	}
+
+	return networkInterface, nil
+}
+
 func FindNetworkInterfaceAttachmentByID(ctx context.Context, conn *ec2.EC2, id string) (*ec2.NetworkInterfaceAttachment, error) {
 	input := &ec2.DescribeNetworkInterfacesInput{
 		Filters: BuildAttributeFilterList(map[string]string{

internal/service/ec2/vpc_network_interface_attachment.go

@@ -15,6 +15,9 @@ func ResourceNetworkInterfaceAttachment() *schema.Resource {
 		Create: resourceNetworkInterfaceAttachmentCreate,
 		Read:   resourceNetworkInterfaceAttachmentRead,
 		Delete: resourceNetworkInterfaceAttachmentDelete,
+		Importer: &schema.ResourceImporter{
+			StateContext: schema.ImportStatePassthroughContext,
+		},
 
 		Schema: map[string]*schema.Schema{
 			"attachment_id": {
@@ -69,7 +72,7 @@ func resourceNetworkInterfaceAttachmentCreate(d *schema.ResourceData, meta inter
 func resourceNetworkInterfaceAttachmentRead(d *schema.ResourceData, meta interface{}) error {
 	conn := meta.(*conns.AWSClient).EC2Conn
 
-	attachment, err := FindNetworkInterfaceAttachmentByID(context.TODO(), conn, d.Id())
+	network_interface, err := FindNetworkInterfaceByAttachmentID(context.TODO(), conn, d.Id())
 
 	if !d.IsNewResource() && tfresource.NotFound(err) {
 		log.Printf("[WARN] EC2 Network Interface Attachment (%s) not found, removing from state", d.Id())
@@ -81,10 +84,11 @@ func resourceNetworkInterfaceAttachmentRead(d *schema.ResourceData, meta interfa
 		return fmt.Errorf("error reading EC2 Network Interface Attachment (%s): %w", d.Id(), err)
 	}
 
-	d.Set("attachment_id", attachment.AttachmentId)
-	d.Set("device_index", attachment.DeviceIndex)
-	d.Set("instance_id", attachment.InstanceId)
-	d.Set("status", attachment.Status)
+	d.Set("network_interface_id", network_interface.NetworkInterfaceId)
+	d.Set("attachment_id", network_interface.Attachment.AttachmentId)
+	d.Set("device_index", network_interface.Attachment.DeviceIndex)
+	d.Set("instance_id", network_interface.Attachment.InstanceId)
+	d.Set("status", network_interface.Attachment.Status)
 
 	return nil
 }

internal/service/ec2/vpc_network_interface_attachment_test.go

@@ -32,6 +32,11 @@ func TestAccVPCNetworkInterfaceAttachment_basic(t *testing.T) {
 					resource.TestCheckResourceAttrSet(resourceName, "status"),
 				),
 			},
+			{
+				ResourceName:      resourceName,
+				ImportState:       true,
+				ImportStateVerify: true,
+			},
 		},
 	})
 }

website/docs/r/network_interface_attachment.html.markdown

@@ -36,3 +36,11 @@ In addition to all arguments above, the following attributes are exported:
 * `network_interface_id` - Network interface ID.
 * `attachment_id` - The ENI Attachment ID.
 * `status` - The status of the Network Interface Attachment.
+
+## Import
+
+Elastic network interface (ENI) Attachments can be imported using its Attachment ID e.g.,
+
+```
+terraform import aws_network_interface_attachment.secondary_nic eni-attach-0a33842b4ec347c4c
+```