iamRole

The name of the Identity and Access Management (IAM) role that you want to assign to the managed node. This IAM role must provide AssumeRole permissions for the Amazon Web Services Systems Manager service principal ssm.amazonaws.com. For more information, see Create an IAM service role for a hybrid environment in the Amazon Web Services Systems Manager User Guide.

You can't specify an IAM service-linked role for this parameter. You must create a unique role.