aws-opensearch: Add latest Opensearch engine version v3.1

[glc-gpestre]

Describe the feature

As of this summer, AWS released the ability to deploy OpenSearch in its newer version 3.1 through both the console and CloudFormation.

Official Doc

Use Case

Deploy Opensearch cluster in the latest major upgrade to test new performances.

Proposed Solution

Add the in the class EngineVersion the following:

  /** AWS OpenSearch 3.0*/
  public static readonly OPENSEARCH_3_0 = EngineVersion.openSearch('3.0');

  /** AWS OpenSearch 3.1 */
  public static readonly OPENSEARCH_3_1 = EngineVersion.openSearch('3.1');

So that the version Engine can be simply retrieved in the stack:

  new Domain(this, 'OpenSearchDomain', {
    version: EngineVersion.OPENSEARCH_3_1,
    domainName: myDomainName,
  });

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS CDK Library version (aws-cdk-lib)

aws-cdk-lib@2.214.0

AWS CDK CLI version

2.1029.1

Environment details (OS name and version, etc.)

macOS 15.6 (Sequoia)

[pahud]

Hi @glc-gpestre,

Thank you for this feature request! You're absolutely right that OpenSearch 3.1 is now available in AWS OpenSearch Service and should be supported in the CDK.

I can see that @claypack has already created PR #35477 which implements exactly what you requested. The implementation follows the established pattern for adding new OpenSearch versions:

• Adds the OPENSEARCH_3_1 constant to the EngineVersion class
• Includes comprehensive unit and integration tests
• Generates the correct CloudFormation template with "EngineVersion": "OpenSearch_3.1"

This will enable you to use OpenSearch 3.1's new features like derived source and star-tree indexing in your CDK applications. Once merged, you'll be able to use:

new Domain(this, 'OpenSearchDomain', {
 version: EngineVersion.OPENSEARCH_3_1,
 domainName: myDomainName,
});

The PR looks ready for review and should address your use case completely. We encourage community contributions like this that keep the CDK up-to-date with the latest AWS service capabilities!

[glc-gpestre]

Hello @pahud,

Thank you for your feedback.

And yes as the PR #35477 is more advance, I will close this PR and review the other.

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