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AWS opensearch-service documentation change

Service: opensearch-service · 2026-05-13 · Documentation low

File: opensearch-service/latest/developerguide/serverless-encryption.md

Summary

Added instructions for customizing encryption settings during collection creation and updated OCU sharing constraints

Security assessment

The change documents encryption customization capabilities (security feature) but doesn't address a specific vulnerability. The OCU update clarifies operational constraints without security implications.

Diff

diff --git a/opensearch-service/latest/developerguide/serverless-encryption.md b/opensearch-service/latest/developerguide/serverless-encryption.md
index c321e7e71..288f28e8f 100644
--- a//opensearch-service/latest/developerguide/serverless-encryption.md
+++ b//opensearch-service/latest/developerguide/serverless-encryption.md
@@ -83,0 +84,8 @@ Even if a policy matches a collection name, you can choose to override this auto
+To override the automatic encryption policy assignment during collection creation using the console, choose **Customize encryption settings** when creating a collection and select your preferred AWS KMS key. Using the AWS CLI, include the `--encryption-policy-name` parameter in the `CreateCollection` request, or specify the `kmsKeyArn` directly:
+    
+    
+    aws opensearchserverless create-collection \
+        --name my-collection \
+        --type SEARCH \
+        --encryption-policy-name my-encryption-policy
+
@@ -102 +110 @@ Consider the following when you configure encryption for your collections:
-  * Collections with unique KMS keys can't share OpenSearch Compute Units (OCUs) with other collections. Each collection with a unique key requires its own 4 OCUs.
+  * Collections with unique KMS keys can't share OpenSearch Compute Units (OCUs) with other collections unless they are part of the same collection group. Each collection with a unique key that is not in a collection group requires its own OCUs. For more information, see [Collection groups](https://docs.aws.amazon.com/opensearch-service/latest/developerguide/serverless-collection-groups.html).