Using service-linked roles for Systems Manager - AWS Systems Manager

Using service-linked roles for Systems Manager

AWS Systems Manager uses AWS Identity and Access Management (IAM) service-linked roles. A service-linked role is a unique type of IAM role that is linked directly to Systems Manager. Service-linked roles are predefined by Systems Manager and include all the permissions that the service requires to call other AWS services on your behalf.

Note

A service role role differs from a service-linked role. A service role is a type of AWS Identity and Access Management (IAM) role that grants permissions to an AWS service so that the service can access AWS resources. Only a few Systems Manager scenarios require a service role. When you create a service role for Systems Manager, you choose the permissions to grant so that it can access or interact with other AWS resources.

A service-linked role makes setting up Systems Manager easier because you don’t have to manually add the necessary permissions. Systems Manager defines the permissions of its service-linked roles, and unless defined otherwise, only Systems Manager can assume its roles. The defined permissions include the trust policy and the permissions policy, and that permissions policy can't be attached to any other IAM entity.

You can delete a service-linked role only after first deleting their related resources. This protects your Systems Manager resources because you can't inadvertently remove permission to access the resources.

For information about other services that support service-linked roles, see AWS services that work with IAM and look for the services that have Yes in the Service-linked roles column. Choose a Yes with a link to view the service-linked role documentation for that service.