provider/aws: Add `arn` fields to ALB resources

This commit adds an `arn` field to `aws_alb` and `aws_alb_target_group`
resources, in order to present a more coherant user experience to people
using resource variables in fields suffixed "arn".

builtin/providers/aws/resource_aws_alb.go

@@ -22,6 +22,11 @@ func resourceAwsAlb() *schema.Resource {
 		},
 
 		Schema: map[string]*schema.Schema{
+			"arn": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+
 			"name": {
 				Type:         schema.TypeString,
 				Required:     true,
@@ -164,6 +169,7 @@ func resourceAwsAlbRead(d *schema.ResourceData, meta interface{}) error {
 
 	alb := describeResp.LoadBalancers[0]
 
+	d.Set("arn", alb.LoadBalancerArn)
 	d.Set("name", alb.LoadBalancerName)
 	d.Set("internal", (alb.Scheme != nil && *alb.Scheme == "internal"))
 	d.Set("security_groups", flattenStringList(alb.SecurityGroups))

builtin/providers/aws/resource_aws_alb_target_group.go

@@ -25,6 +25,11 @@ func resourceAwsAlbTargetGroup() *schema.Resource {
 		},
 
 		Schema: map[string]*schema.Schema{
+			"arn": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+
 			"name": {
 				Type:     schema.TypeString,
 				Required: true,
@@ -206,6 +211,7 @@ func resourceAwsAlbTargetGroupRead(d *schema.ResourceData, meta interface{}) err
 
 	targetGroup := resp.TargetGroups[0]
 
+	d.Set("arn", targetGroup.TargetGroupArn)
 	d.Set("name", targetGroup.TargetGroupName)
 	d.Set("port", targetGroup.Port)
 	d.Set("protocol", targetGroup.Protocol)

builtin/providers/aws/resource_aws_alb_target_group_test.go

@@ -27,6 +27,7 @@ func TestAccAWSALBTargetGroup_basic(t *testing.T) {
 				Config: testAccAWSALBTargetGroupConfig_basic(targetGroupName),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					testAccCheckAWSALBTargetGroupExists("aws_alb_target_group.test", &conf),
+					resource.TestCheckResourceAttrSet("aws_alb_target_group.test", "arn"),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "name", targetGroupName),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "port", "443"),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "protocol", "HTTPS"),
@@ -64,6 +65,7 @@ func TestAccAWSALBTargetGroup_updateHealthCheck(t *testing.T) {
 				Config: testAccAWSALBTargetGroupConfig_basic(targetGroupName),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					testAccCheckAWSALBTargetGroupExists("aws_alb_target_group.test", &conf),
+					resource.TestCheckResourceAttrSet("aws_alb_target_group.test", "arn"),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "name", targetGroupName),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "port", "443"),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "protocol", "HTTPS"),
@@ -87,6 +89,7 @@ func TestAccAWSALBTargetGroup_updateHealthCheck(t *testing.T) {
 				Config: testAccAWSALBTargetGroupConfig_updateHealthCheck(targetGroupName),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					testAccCheckAWSALBTargetGroupExists("aws_alb_target_group.test", &conf),
+					resource.TestCheckResourceAttrSet("aws_alb_target_group.test", "arn"),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "name", targetGroupName),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "port", "443"),
 					resource.TestCheckResourceAttr("aws_alb_target_group.test", "protocol", "HTTPS"),

builtin/providers/aws/resource_aws_alb_test.go

@@ -38,6 +38,7 @@ func TestAccAWSALB_basic(t *testing.T) {
 					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "vpc_id"),
 					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "zone_id"),
 					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "dns_name"),
+					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "arn"),
 				),
 			},
 		},
@@ -70,6 +71,7 @@ func TestAccAWSALB_accesslogs(t *testing.T) {
 					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "vpc_id"),
 					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "zone_id"),
 					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "dns_name"),
+					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "arn"),
 				),
 			},
 
@@ -91,6 +93,7 @@ func TestAccAWSALB_accesslogs(t *testing.T) {
 					resource.TestCheckResourceAttr("aws_alb.alb_test", "access_logs.#", "1"),
 					resource.TestCheckResourceAttr("aws_alb.alb_test", "access_logs.0.bucket", bucketName),
 					resource.TestCheckResourceAttr("aws_alb.alb_test", "access_logs.0.prefix", "testAccAWSALBConfig_accessLogs"),
+					resource.TestCheckResourceAttrSet("aws_alb.alb_test", "arn"),
 				),
 			},
 		},

website/source/docs/providers/aws/r/alb.html.markdown

@@ -56,7 +56,8 @@ Access Logs (`access_logs`) support the following:
 
 The following attributes are exported in addition to the arguments listed above:
 
-* `id` - The ARN of the load balancer
+* `id` - The ARN of the load balancer (matches `arn`)
+* `arn` - The ARN of the load balancer (matches `id`)
 * `dns_name` - The DNS name of the load balancer
 * `canonical_hosted_zone_id` - The canonical hosted zone ID of the load balancer.
 * `zone_id` - The canonical hosted zone ID of the load balancer (to be used in a Route 53 Alias record)

website/source/docs/providers/aws/r/alb_listener.html.markdown

@@ -23,14 +23,14 @@ resource "aws_alb_target_group" "front_end" {
 }
 
 resource "aws_alb_listener" "front_end" {
-   load_balancer_arn = "${aws_alb.front_end.id}"
+   load_balancer_arn = "${aws_alb.front_end.arn}"
    port = "443"
    protocol = "HTTPS"
    ssl_policy = "ELBSecurityPolicy-2015-05"
    certificate_arn = "arn:aws:iam::187416307283:server-certificate/test_cert_rab3wuqwgja25ct3n4jdj2tzu4"
    
    default_action {
-     target_group_arn = "${aws_alb_target_group.front_end.id}"
+     target_group_arn = "${aws_alb_target_group.front_end.arn}"
      type = "forward"
    }
 }

website/source/docs/providers/aws/r/alb_target_group.html.markdown

@@ -49,7 +49,8 @@ Health Check Blocks (`health_check`) support the following:
 
 The following attributes are exported in addition to the arguments listed above:
 
-* `id` - The ARN of the target group.
+* `id` - The ARN of the Target Group (matches `arn`)
+* `arn` - The ARN of the Target Group (matches `id`)
 
 ## Import