domainName

A name for the OpenSearch Service domain. The name must have a minimum length of 3 and a maximum length of 28. If you don't specify a name, AWS CloudFormation generates a unique physical ID and uses that ID for the domain name. For more information, see Name Type . Required when creating a new domain.

If you specify a name, you can't perform updates that require replacement of this resource. You can perform updates that require no or some interruption. If you must replace the resource, specify a new name.