How can I migrate data from one OpenSearch Service domain to another?

Short description

You can use manual snapshots to migrate individual indices or entire OpenSearch Service domains. You can migrate data to a domain in the same AWS account or to a domain in a different account.

Resolution

Prerequisites:

• You meet the manual snapshot prerequisites.
• Your OpenSearch Service client can send signed HTTP requests to your domain's endpoint.
• The source domain is compatible with the Elasticsearch version of the destination domain. For more information, see Snapshot and restore on the Elasticsearch website.

Complete the following steps:

1.    Register the same manual snapshot repository on both the source and destination domains. Your destination is usually an Amazon Simple Storage Service (Amazon S3) bucket.

Note: You can use server-side encryption with Amazon S3 managed keys (SSE-S3) to encrypt the S3 bucket that you use as the snapshot repository.

2.    (Optional) If you're migrating to another account, then attach a policy to the source S3 bucket that grants cross-account permissions to the destination.

3.    Take a manual snapshot of the source domain.

4.    Use the _restore API to restore the snapshot to the destination domain.

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