AWS::IAM::ServiceLinkedRole - AWS CloudFormation


Creates an IAM role that is linked to a specific AWS service. The service controls the attached policies and when the role can be deleted. This helps ensure that the service is not broken by an unexpectedly changed or deleted role, which could put your AWS resources into an unknown state. Allowing the service to control the role helps improve service stability and proper cleanup when a service and its role are no longer needed. For more information, see Using Service-Linked Roles in the IAM User Guide.

To attach a policy to this service-linked role, you must make the request using the AWS service that depends on this role.


To declare this entity in your AWS CloudFormation template, use the following syntax:


{ "Type" : "AWS::IAM::ServiceLinkedRole", "Properties" : { "AWSServiceName" : String, "CustomSuffix" : String, "Description" : String } }


Type: AWS::IAM::ServiceLinkedRole Properties: AWSServiceName: String CustomSuffix: String Description: String



The service principal for the AWS service to which this role is attached. You use a string similar to a URL but without the http:// in front. For example:

Service principals are unique and case-sensitive. To find the exact service principal for your service-linked role, see AWS Services That Work with IAM in the IAM User Guide. Look for the services that have Yes in the Service-Linked Role column. Choose the Yes link to view the service-linked role documentation for that service.

Required: Yes

Type: String

Minimum: 1

Maximum: 128

Pattern: [\w+=,.@-]+

Update requires: Replacement


A string that you provide, which is combined with the service-provided prefix to form the complete role name. If you make multiple requests for the same service, then you must supply a different CustomSuffix for each request. Otherwise the request fails with a duplicate role name error. For example, you could add -1 or -debug to the suffix.

Some services do not support the CustomSuffix parameter. If you provide an optional suffix and the operation fails, try the operation again without the suffix.

Required: No

Type: String

Minimum: 1

Maximum: 64

Pattern: [\w+=,.@-]+

Update requires: Replacement


The description of the role.

Required: No

Type: String

Maximum: 1000

Pattern: [\p{L}\p{M}\p{Z}\p{S}\p{N}\p{P}]*

Update requires: No interruption

Return values


When the logical ID of this resource is provided to the Ref intrinsic function, Ref returns the resource name.

For example:

{ "Ref": "BasicSLR" }

For the AWS::IAM::ServiceLinkedRole resource with the logical ID BasicSLR, Ref will return the name of the service-linked role.

For more information about using the Ref function, see Ref.


Create an IAM Service-Linked Role for Auto Scaling

The following example creates a service-linked role that can be assumed by the Auto Scaling service.


{ "Description": "SLR resource create test - Auto Scaling", "Resources": { "BasicSLR": { "Type": "AWS::IAM::ServiceLinkedRole", "Properties": { "AWSServiceName": "", "Description": "Test SLR description", "CustomSuffix": "TestSuffix" } } }, "Outputs": { "SLRId": { "Value": { "Ref": "BasicSLR" } } } }


Description: SLR resource create test - Auto Scaling Resources: BasicSLR: Type: 'AWS::IAM::ServiceLinkedRole' Properties: AWSServiceName: Description: Test SLR description CustomSuffix: TestSuffix Outputs: SLRId: Value: !Ref BasicSLR