resource/aws_cloudformation_stack_set: Wait for update operation comp…

…letion and report any errors (#11726)

Previously in the acceptance testing:

```
--- FAIL: TestAccAWSCloudFormationStackSet_Parameters (35.78s)
    testing.go:640: Step 4 error: errors during apply:

        Error: error updating CloudFormation Stack Set (tf-acc-test-5503547290025742409): OperationInProgressException: Another Operation on StackSet arn:aws:cloudformation:us-west-2:*******:stackset/tf-acc-test-5503547290025742409:55908c5e-ea0e-482f-b21c-2c1fb21fb1ac is in progress
        	status code: 409, request id: c123a6e4-3577-4c85-8964-a898d81c597d

          on /opt/teamcity-agent/temp/buildTmp/tf-test708526898/main.tf line 7:
          (source code not available)

    testing.go:701: Error destroying resource! WARNING: Dangling resources
        may exist. The full state and error is shown below.

        Error: errors during apply: error deleting CloudFormation Stack Set (tf-acc-test-5503547290025742409): OperationInProgressException: Operation terraform-20200122114208738100000003 on StackSet arn:aws:cloudformation:us-west-2:*******:stackset/tf-acc-test-5503547290025742409:55908c5e-ea0e-482f-b21c-2c1fb21fb1ac is in progress
        	status code: 409, request id: b8059f09-effd-494a-8f43-17a6cac30d81
```

Output from acceptance testing:

```
--- PASS: TestAccAWSCloudFormationStackSet_Description (38.41s)
--- PASS: TestAccAWSCloudFormationStackSet_disappears (41.35s)
--- PASS: TestAccAWSCloudFormationStackSet_ExecutionRoleName (57.63s)
--- PASS: TestAccAWSCloudFormationStackSet_Name (61.53s)
--- PASS: TestAccAWSCloudFormationStackSet_basic (72.71s)
--- PASS: TestAccAWSCloudFormationStackSet_TemplateUrl (73.85s)
--- PASS: TestAccAWSCloudFormationStackSet_AdministrationRoleArn (78.93s)
--- PASS: TestAccAWSCloudFormationStackSet_Parameters (104.93s)
--- PASS: TestAccAWSCloudFormationStackSet_TemplateBody (108.84s)
--- PASS: TestAccAWSCloudFormationStackSet_Tags (134.72s)
```

aws/resource_aws_cloudformation_stack_set.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"log"
 	"regexp"
+	"time"
 
 	"github.com/aws/aws-sdk-go/aws"
 	"github.com/aws/aws-sdk-go/service/cloudformation"
@@ -24,6 +25,10 @@ func resourceAwsCloudFormationStackSet() *schema.Resource {
 			State: schema.ImportStatePassthrough,
 		},
 
+		Timeouts: &schema.ResourceTimeout{
+			Update: schema.DefaultTimeout(30 * time.Minute),
+		},
+
 		Schema: map[string]*schema.Schema{
 			"administration_role_arn": {
 				Type:         schema.TypeString,
@@ -228,12 +233,16 @@ func resourceAwsCloudFormationStackSetUpdate(d *schema.ResourceData, meta interf
 	}
 
 	log.Printf("[DEBUG] Updating CloudFormation Stack Set: %s", input)
-	_, err := conn.UpdateStackSet(input)
+	output, err := conn.UpdateStackSet(input)
 
 	if err != nil {
 		return fmt.Errorf("error updating CloudFormation Stack Set (%s): %s", d.Id(), err)
 	}
 
+	if err := waitForCloudFormationStackSetOperation(conn, d.Id(), aws.StringValue(output.OperationId), d.Timeout(schema.TimeoutUpdate)); err != nil {
+		return fmt.Errorf("error waiting for CloudFormation Stack Set (%s) update: %s", d.Id(), err)
+	}
+
 	return resourceAwsCloudFormationStackSetRead(d, meta)
 }
 

website/docs/r/cloudformation_stack_set.html.markdown

@@ -103,6 +103,12 @@ In addition to all arguments above, the following attributes are exported:
 * `id` - Name of the Stack Set.
 * `stack_set_id` - Unique identifier of the Stack Set.
 
+## Timeouts
+
+`aws_cloudformation_stack_set` provides the following [Timeouts](/docs/configuration/resources.html#timeouts) configuration options:
+
+* `update` - (Default `30m`) How long to wait for a Stack Set to be updated.
+
 ## Import
 
 CloudFormation Stack Sets can be imported using the `name`, e.g.