# CloudTrail log file examples for directory buckets
A CloudTrail log file includes information about the requested API operation, the date and time of the operation, request parameters, and so on. This topic features examples for CloudTrail data events and management events for directory buckets.
**Topics**
+ [CloudTrail data event log file examples for directory buckets](#example-ct-log-s3express)
## CloudTrail data event log file examples for directory buckets
The following example shows a CloudTrail log file example that demonstrates [https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateSession.html](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateSession.html).
```
{
"eventVersion": "1.09",
"userIdentity": {
"type": "AssumedRole",
"principalId": "AROAIDPPEZS35WEXAMPLE:AssumedRoleSessionName",
"arn": "arn:aws:sts::111122223333assumed-role/RoleToBeAssumed/MySessionName",
"accountId": "111122223333",
"accessKeyId": "AKIAIOSFODNN7EXAMPLE",
"sessionContext": {
"sessionIssuer": {
"type": "Role",
"principalId": "AROAIDPPEZS35WEXAMPLE",
"arn": "arn:aws:iam::111122223333:role/RoleToBeAssumed",
"accountId": "111122223333",
"userName":"RoleToBeAssumed
},
"attributes": {
"creationDate": "2024-07-02T00:21:16Z",
"mfaAuthenticated": "false"
}
}
},
"eventTime": "2024-07-02T00:22:11Z",
"eventSource": "s3express.amazonaws.com",
"eventName": "CreateSession",
"awsRegion": "us-west-2",
"sourceIPAddress": "72.21.198.68",
"userAgent": "aws-sdk-java/2.20.160-SNAPSHOT Linux/5.10.216-225.855.amzn2.x86_64 OpenJDK_64-Bit_Server_VM/11.0.23+9-LTS Java/11.0.23 vendor/Amazon.com_Inc. md/internal exec-env/AWS_Lambda_java11 io/sync http/Apache cfg/retry-mode/standard",
"requestParameters": {
"bucketName": "bucket-base-name--usw2-az1--x-s3".
"host": "bucket-base-name--usw2-az1--x-s3.s3express-usw2-az1.us-west-2.amazonaws.com",
"x-amz-create-session-mode": "ReadWrite"
},
"responseElements": {
"credentials": {
"accessKeyId": "AKIAI44QH8DHBEXAMPLE"
"expiration": ""Mar 20, 2024, 11:16:09 PM",
"sessionToken": ""
},
},
"additionalEventData": {
"SignatureVersion": "SigV4",
"cipherSuite": "TLS_AES_128_GCM_SHA256",
"bytesTransferredIn": 0,
"AuthenticationMethod": "AuthHeader",
"xAmzId2": "q6xhNJYmhg",
"bytesTransferredOut": 1815,
"availabilityZone": "usw2-az1"
},
"requestID": "28d2faaf-3319-4649-998d-EXAMPLE72818",
"eventID": "694d604a-d190-4470-8dd1-EXAMPLEe20c1",
"readOnly": true,
"resources": [
{
"type": "AWS::S3Express::Object",
"ARNPrefix": "arn:aws:s3express:us-west-2:111122223333:bucket-base-name--usw2-az1--x-s3"
},
{
"accountId": "111122223333"
"type": "AWS::S3Express::DirectoryBucket",
"ARN": "arn:aws:s3express:us-west-2:111122223333:bucket-base-name--usw2-az1--x-s3"
}
],
"eventType": "AwsApiCall",
"managementEvent": false,
"recipientAccountId": "111122223333",
"eventCategory": "Data",
"tlsDetails": {
"tlsVersion": "TLSv1.3",
"cipherSuite": "TLS_AES_128_GCM_SHA256",
"clientProvidedHostHeader": "bucket-base-name--usw2-az1--x-s3.s3express-usw2-az1.us-west-2.amazonaws.com"
}
}
```
To use Zonal endpoint API operations (object-level, or data plane, operations), you can use the `CreateSession` API operation to create and manage sessions that are optimized for low-latency authorization of data requests. You can also use `CreateSession` to reduce the amount of logging. To identify which Zonal API operations were performed during a session, you can match the `accessKeyId` under the `responseElements` in your `CreateSession` log file to the `accessKeyId` in the log file of other Zonal API operations. For more information, see [`CreateSession` authorization](https://docs.aws.amazon.com/AmazonS3/latest/userguide/s3-express-create-session.html).
The following example shows a CloudTrail log file example that demonstrates the [https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObject.html](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObject.html) API operation that was authenticated by `CreateSession`.
```
{
"eventVersion": "1.09",
"userIdentity": {
"type": "AssumedRole",
"principalId": "AROAIDPPEZS35WEXAMPLE:AssumedRoleSessionName",
"arn": "arn:aws:sts::111122223333assumed-role/RoleToBeAssumed/MySessionName",
"accountId": "111122223333",
"accessKeyId": "AKIAI44QH8DHBEXAMPLE",
"sessionContext": {
"attributes": {
"creationDate": "2024-07-02T00:21:49Z"
}
}
},
"eventTime": "2024-07-02T00:22:01Z",
"eventSource": "s3express.amazonaws.com",
"eventName": "GetObject",
"awsRegion": "us-west-2",
"sourceIPAddress": "72.21.198.68",
"userAgent": "aws-sdk-java/2.25.66 Linux/5.10.216-225.855.amzn2.x86_64 OpenJDK_64-Bit_Server_VM/17.0.11+9-LTS Java/17.0.11 vendor/Amazon.com_Inc. md/internal exec-env/AWS_Lambda_java17 io/sync http/Apache cfg/retry-mode/legacy",
"requestParameters": {
"bucketName": "bucket-base-name--usw2-az1--x-s3",
"x-amz-checksum-mode": "ENABLED",
"Host": "bucket-base-name--usw2-az1--x-s3.s3express-usw2-az1.us-west-2.amazonaws.com",
"key": "test-get-obj-with-checksum"
},
"responseElements": null,
"additionalEventData": {
"SignatureVersion": "Sigv4",
"CipherSuite": "TLS_AES_128_GCM_SHA256",
"bytesTransferredIn": 0,
"AuthenticationMethod": "AuthHeader",
"x-amz-id-2": "oOy6w8K7LFsyFN",
"bytesTransferredOut": 9,
"availabilityZone": "usw2-az1",
"sessionModeApplied": "ReadWrite"
},
"requestID": "28d2faaf-3319-4649-998d-EXAMPLE72818",
"eventID": "694d604a-d190-4470-8dd1-EXAMPLEe20c1",
"readOnly": true,
"resources": [
{
"type": "AWS::S3Express::Object",
"ARNPrefix": "arn:aws:s3express:us-west-2:111122223333:bucket-base-name--usw2-az1--x-s3"
},
{
"accountId": "111122223333",
"type": "AWS::S3Express::DirectoryBucket",
"ARN": "arn:aws:s3express:us-west-2:111122223333:bucket-base-name--usw2-az1--x-s3"
}
],
"eventType": "AwsApiCall",
"managementEvent": false,
"recipientAccountId": "111122223333",
"eventCategory": "Data",
"tlsDetails": {
"tlsVersion": "TLSv1.3",
"cipherSuite": "TLS_AES_128_GCM_SHA256",
"clientProvidedHostHeader": "bucket-base-name--usw2-az1--x-s3.s3express-usw2-az1.us-west-2.amazonaws.com"
}
}
```
In the `GetObject` log file example above, the `accessKeyId`(AKIAI44QH8DHBEXAMPLE) matches the `accessKeyId` under the `responseElements` in the CreateSession log file example. The matching `accessKeyId` indicates the session in which `GetObject` operation was performed.
The following example shows a CloudTrail log entry that demonstrates a `DeleteObjects` action on a directory bucket, invoked by S3 Lifecycle. For more information, see [https://docs.aws.amazon.com/AmazonS3/latest/userguide/directory-buckets-objects-lifecycle.html](https://docs.aws.amazon.com/AmazonS3/latest/userguide/directory-buckets-objects-lifecycle.html).
```
eventVersion:"1.09",
userIdentity:{
type:"AWSService",
invokedBy:"lifecycle.s3.amazonaws.com"
},
eventTime:"2024-09-11T00:55:54Z",
eventSource:"s3express.amazonaws.com",
eventName:"DeleteObjects",
awsRegion:"us-east-2",
sourceIPAddress:"lifecycle.s3.amazonaws.com",
userAgent:"gamma.lifecycle.s3.amazonaws.com",
requestParameters:{
bucketName:"amzn-s3-demo-bucket--use2-az2--x-s3",
'x-amz-expected-bucket-owner':"637423581905",
Host:"amzn-s3-demo-bucket--use2-az2--x-s3.gamma.use2-az2.express.s3.aws.dev",
delete:"",
'x-amz-sdk-checksum-algorithm':"CRC32C"
},
responseElements:null,
additionalEventData:{
SignatureVersion:"Sigv4",
CipherSuite:"TLS_AES_128_GCM_SHA256",
bytesTransferredIn:41903,
AuthenticationMethod:"AuthHeader",
'x-amz-id-2':"9H5YWZY0",
bytesTransferredOut:35316,
availabilityZone:"use2-az2",
sessionModeApplied:"ReadWrite"
},
requestID:"011eeadd04000191",
eventID:"d3d8b116-219d-4ee6-a072-5f9950733c74",
readOnly:false,
resources:[
{
type:"AWS::S3Express::Object",
ARNPrefix:"arn:aws:s3express:us-east-2:637423581905:bucket/amzn-s3-demo-bucket--use2-az2--x-s3/"
},
{
accountId:"637423581905",
type:"AWS::S3Express::DirectoryBucket",
ARN:"arn:aws:s3express:us-east-2:637423581905:bucket/amzn-s3-demo-bucket--use2-az2--x-s3"
}
],
eventType:"AwsApiCall",
managementEvent:false,
recipientAccountId:"637423581905",
sharedEventID:"59f877ac-1dd9-415d-b315-9bb8133289ce",
eventCategory:"Data"
}
```
The following example shows a CloudTrail log entry that demonstrates an `Access Denied` request on a `CreateSession` action invoked by S3 Lifecycle. For more information, see [https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateSession.html](https://docs.aws.amazon.com/AmazonS3/latest/API/API_CreateSession.html).
```
{
"eventVersion": "1.09",
"userIdentity": {
"type": "AWSService",
"invokedBy": "gamma.lifecycle.s3.amazonaws.com"
},
"eventTime": "2024-09-11T18:13:08Z",
"eventSource": "s3express.amazonaws.com",
"eventName": "CreateSession",
"awsRegion": "us-east-2",
"sourceIPAddress": "gamma.lifecycle.s3.amazonaws.com",
"userAgent": "gamma.lifecycle.s3.amazonaws.com",
"errorCode": "AccessDenied",
"errorMessage": "Access Denied",
"requestParameters": {
"bucketName": "amzn-s3-demo-bucket--use2-az2--x-s3",
"Host": "amzn-s3-demo-bucket--use2-az2--x-s3.gamma.use2-az2.express.s3.aws.dev",
"x-amz-create-session-mode": "ReadWrite",
"x-amz-server-side-encryption": "AES256"
},
"responseElements": null,
"additionalEventData": {
"SignatureVersion": "Sigv4",
"CipherSuite": "TLS_AES_128_GCM_SHA256",
"bytesTransferredIn": 0,
"AuthenticationMethod": "AuthHeader",
"x-amz-id-2": "zuDDC1VNbC4LoNwUIc5",
"bytesTransferredOut": 210,
"availabilityZone": "use2-az2"
},
"requestID": "010932f174000191e24a0",
"eventID": "dce7cc46-4cd3-46c0-9a47-d1b8b70e301c",
"readOnly": true,
"resources": [{
"type": "AWS::S3Express::Object",
"ARNPrefix": "arn:aws:s3express:us-east-2:637423581905:bucket/amzn-s3-demo-bucket--use2-az2--x-s3/"
},
{
"accountId": "637423581905",
"type": "AWS::S3Express::DirectoryBucket",
"ARN": "arn:aws:s3express:us-east-2:637423581905:bucket/amzn-s3-demo-bucket--use2-az2--x-s3"
}
],
"eventType": "AwsApiCall",
"managementEvent": false,
"recipientAccountId": "637423581905",
"sharedEventID": "da96b5bd-6066-4a8d-ad8d-f7f427ca7d58",
"eventCategory": "Data"
}
```