# Amazon OpenSearch Service Ingestion Service events
OpenSearch Service Ingestion Service

OpenSearch Service Ingestion Service sends service events to EventBridge via AWS CloudTrail.

## OpenSearch Service Ingestion Service events delivered via AWS CloudTrail
Events via CloudTrail

AWS CloudTrail sends events originating from OpenSearch Service Ingestion Service to EventBridge. AWS services deliver events to CloudTrail on a [best effort](event-delivery-level.md) basis. For more information, see [AWS service events delivered via AWS CloudTrail](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-service-event-cloudtrail.html) in the *Amazon EventBridge User Guide*.

To match events from this service delivered by AWS CloudTrail, create an event pattern that matches against the following event attributes:
+ `source`: aws.osis
+ `eventSource`: osis.amazonaws.com

```
{
  "source": ["aws.osis"],
  "detail-type": ["AWS API Call via CloudTrail"],
  "detail": {
    "eventSource": ["osis.amazonaws.com"]
  }
}
```

To match against a specific API calls from this service, include an `eventName` attribute specifying an array of API calls to match:

```
{
  "source": ["aws.osis"],
  "detail-type": ["AWS API Call via CloudTrail"],
  "detail": {
    "eventSource": ["osis.amazonaws.com"],
    "eventName": ["api-action-name"]
  }
}
```