**To configure event selectors for a trail** To create an event selector, run the ''put-event-selectors'' command. When an event occurs in your account, CloudTrail evaluates the configuration for your trails. If the event matches any event selector for a trail, the trail processes and logs the event. You can configure up to 5 event selectors for a trail and up to 250 data resources for a trail. The following example creates an event selector for a trail named ''TrailName'' to include read-only and write-only management events, data events for two Amazon S3 bucket/prefix combinations, and data events for a single AWS Lambda function named ''hello-world-python-function'':: aws cloudtrail put-event-selectors --trail-name TrailName --event-selectors '[{"ReadWriteType": "All","IncludeManagementEvents": true,"DataResources": [{"Type":"AWS::S3::Object", "Values": ["arn:aws:s3:::mybucket/prefix","arn:aws:s3:::mybucket2/prefix2"]},{"Type": "AWS::Lambda::Function","Values": ["arn:aws:lambda:us-west-2:999999999999:function:hello-world-python-function"]}]}]' Output:: { "EventSelectors": [ { "IncludeManagementEvents": true, "DataResources": [ { "Values": [ "arn:aws:s3:::mybucket/prefix", "arn:aws:s3:::mybucket2/prefix2" ], "Type": "AWS::S3::Object" }, { "Values": [ "arn:aws:lambda:us-west-2:123456789012:function:hello-world-python-function" ], "Type": "AWS::Lambda::Function" }, ], "ReadWriteType": "All" } ], "TrailARN": "arn:aws:cloudtrail:us-east-2:123456789012:trail/TrailName" } The following example creates an event selector for a trail named ''TrailName2'' that includes all events, including read-only and write-only management events, and all data events for all Amazon S3 buckets and AWS Lambda functions in the AWS account:: aws cloudtrail put-event-selectors --trail-name TrailName2 --event-selectors '[{"ReadWriteType": "All","IncludeManagementEvents": true,"DataResources": [{"Type":"AWS::S3::Object", "Values": ["arn:aws:s3:::"]},{"Type": "AWS::Lambda::Function","Values": ["arn:aws:lambda"]}]}]' Output:: { "EventSelectors": [ { "IncludeManagementEvents": true, "DataResources": [ { "Values": [ "arn:aws:s3:::" ], "Type": "AWS::S3::Object" }, { "Values": [ "arn:aws:lambda" ], "Type": "AWS::Lambda::Function" }, ], "ReadWriteType": "All" } ], "TrailARN": "arn:aws:cloudtrail:us-east-2:123456789012:trail/TrailName2" }