Add all-active ingestion setting (#965)

Signed-off-by: Varun Bharadwaj <[email protected]>

Author: varunbharadwaj

CHANGELOG.md

@@ -17,6 +17,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Changed the type of the `DocStatus` properties from int32 to int64 ([#933](https://github.com/opensearch-project/opensearch-api-specification/pull/933))
 - Add pull-based ingestion APIs and properties. Also add replication type in index settings ([#926](https://github.com/opensearch-project/opensearch-api-specification/pull/926))
 - Added `additional_config` to `ModelConfig` ([#936](https://github.com/opensearch-project/opensearch-api-specification/pull/936))
+- Added `all_active` config to the IngestionSource under index settings ([#965](https://github.com/opensearch-project/opensearch-api-specification/pull/965))
 
 ### Removed
 

spec/schemas/indices._common.yaml

@@ -210,6 +210,9 @@ components:
           type: object
           additionalProperties: true
           description: Custom parameters for the ingestion source.
+        all_active:
+          description: Indicates if all-active ingestion is enabled for this index.
+          $ref: '_common.yaml#/components/schemas/StringifiedBoolean'
     IngestionSourcePointer:
       type: object
       properties: