Can anyone help with the AWS DMS target endpoint setup for OpenSearch, we are trying CDC option from a database into OpenSearch

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
OpenSearch 2.7

Describe the issue:
AWS DMS target endpoint unable to assume AWS role and connect to OpenSearch domain

We did the AWS role mapping for the OpenSearch local user with proper cluster and index permissions.
AWS roles, and policies are created as well.

Relevant Logs or Screenshots:
The IAM Role arn:aws:iam::xxxx:role/custom-opensearch-role1 is not configured properly.AccessDenied

Hi @sundarkannan

How have you deployed OpenSearch?

Have you used the Amazon OpenSearch Service, or have you deployed OpenSearch using one of the following methods:
Installing OpenSearch - OpenSearch documentation ?

Hi Thanks for the response.
Yes I have working OpenSearch and I am able to connect from AWS DMS Target endpoint with OpenSearch now. The resolution was to use non master internal user.