provider/aws: Add support description to aws_iam_role

Fixes hashicorp#14198

builtin/providers/aws/resource_aws_iam_role.go

@@ -82,6 +82,11 @@ func resourceAwsIamRole() *schema.Resource {
 				ForceNew: true,
 			},
 
+			"description": &schema.Schema{
+				Type:     schema.TypeString,
+				Optional: true,
+			},
+
 			"assume_role_policy": {
 				Type:             schema.TypeString,
 				Required:         true,
@@ -112,6 +117,7 @@ func resourceAwsIamRoleCreate(d *schema.ResourceData, meta interface{}) error {
 	request := &iam.CreateRoleInput{
 		Path:                     aws.String(d.Get("path").(string)),
 		RoleName:                 aws.String(name),
+		Description:              aws.String(d.Get("description").(string)),
 		AssumeRolePolicyDocument: aws.String(d.Get("assume_role_policy").(string)),
 	}
 
@@ -168,6 +174,20 @@ func resourceAwsIamRoleUpdate(d *schema.ResourceData, meta interface{}) error {
 		}
 	}
 
+	if d.HasChange("description") {
+		roleDescriptionInput := &iam.UpdateRoleDescriptionInput{
+			RoleName:    aws.String(d.Id()),
+			Description: aws.String(d.Get("description").(string)),
+		}
+		_, err := iamconn.UpdateRoleDescription(roleDescriptionInput)
+		if err != nil {
+			if iamerr, ok := err.(awserr.Error); ok && iamerr.Code() == "NoSuchEntity" {
+				d.SetId("")
+				return nil
+			}
+			return fmt.Errorf("Error Updating IAM Role (%s) Description: %s", d.Id(), err)
+		}
+	}
 	return nil
 }
 
@@ -189,6 +209,13 @@ func resourceAwsIamRoleReadResult(d *schema.ResourceData, role *iam.Role) error
 		return err
 	}
 
+	if role.Description != nil {
+		// the description isn't present in the response to CreateRole.
+		if err := d.Set("description", role.Description); err != nil {
+			return err
+		}
+	}
+
 	assumRolePolicy, err := url.QueryUnescape(*role.AssumeRolePolicyDocument)
 	if err != nil {
 		return err

builtin/providers/aws/resource_aws_iam_role_test.go

@@ -178,6 +178,10 @@ func testAccCheckAWSRoleAttributes(role *iam.GetRoleOutput) resource.TestCheckFu
 		if *role.Role.Path != "/" {
 			return fmt.Errorf("Bad path: %s", *role.Role.Path)
 		}
+
+		if *role.Role.Description != "Test Role" {
+			return fmt.Errorf("Bad description: %s", *role.Role.Description)
+		}
 		return nil
 	}
 }
@@ -186,6 +190,7 @@ const testAccAWSRoleConfig = `
 resource "aws_iam_role" "role" {
   name   = "test-role"
   path = "/"
+  description = "Test Role"
   assume_role_policy = "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":{\"Service\":[\"ec2.amazonaws.com\"]},\"Action\":[\"sts:AssumeRole\"]}]}"
 }
 `

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

@@ -46,6 +46,7 @@ The following arguments are supported:
 
 * `path` - (Optional) The path to the role.
   See [IAM Identifiers](https://docs.aws.amazon.com/IAM/latest/UserGuide/Using_Identifiers.html) for more information.
+* `description` - (Optional) The description of the role.
 
 ## Attributes Reference
 
@@ -55,6 +56,7 @@ The following attributes are exported:
 * `create_date` - The creation date of the IAM role.
 * `unique_id` - The stable and unique string identifying the role.
 * `name` - The name of the role.
+* `description` - The description of the role.
 
 ## Example of Using Data Source for Assume Role Policy