OpenSearch Service Domain with Internal User Database and Secrets Manager Secret

This template creates an OpenSearch Service domain with fine-grained access control. The domain is configured with two data nodes and three dedicated master nodes. It has 10 GiB of storage and enables EBS. The access policy allows a specific IAM role to perform all actions on the domain. Advanced security options are enabled with an internal user database and a master user with a specified username and password stored in the Secret created in the template.