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# 示例：AppStream 2.0 日志文件条目
<a name="understanding-service-name-entries"></a>

 跟踪是一种配置，可用于将事件作为日志文件传送到您指定的 Amazon S3 存储桶。CloudTrail 日志文件包含一个或多个日记账条目。一个事件表示来自任何源的一个请求，包括有关所请求的操作、操作的日期和时间、请求参数等方面的信息。CloudTrail 日志文件不是公用 API 调用的有序堆栈跟踪，因此它们不会按任何特定顺序显示。

下面的示例显示了一个 CloudTrail 日志条目，该条目说明了 `AssociateFleet` 事件。

```
{
  "eventVersion": "1.05",
  "userIdentity": {
    "type": "AssumedRole",
    "principalId": "AIDACKCEVSQ6C2EXAMPLE:janeroe",
    "arn": "arn:aws:sts:: 123456789012:assumed-role/Admin/janeroe",
    "accountId": "123456789012",
    "accessKeyId": "AKIAIOSFODNN7EXAMPLE",
    "sessionContext": {
      "attributes": {
        "mfaAuthenticated": "false",
        "creationDate": "2019-03-12T06:41:50Z"
      },
      "sessionIssuer": {
        "type": "Role",
        "principalId": "AIDACKCEVSQ6C2EXAMPLE",
        "arn": "arn:aws:iam:: 123456789012:role/Admin",
        "accountId": "123456789012",
        "userName": "Admin"
      }
    }
  },
  "eventTime": "2019-03-12T06:58:09Z",
  "eventSource": "appstream.amazonaws.com",
  "eventName": "AssociateFleet",
  "awsRegion": "us-east-1",
  "sourceIPAddress": "198.51.100.15",
  "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36",
  "requestParameters": {
    "fleetName": "ExampleFleet1",
    "stackName": "ExampleStack1"
  },
  "responseElements": null,
  "requestID": "3210a159-4494-11e9-8017-873084baf125",
  "eventID": "a6fbde60-a55a-46fe-87d4-89ead558dffd",
  "eventType": "AwsApiCall",
  "recipientAccountId": "123456789012"
}
```

以下示例显示一个 CloudTrail 日志条目，它说明了使用 AppStream 2.0 映像生成器创建映像时发生的 `CreateImage` 事件。

```
{
  "eventVersion": "1.05",
  "userIdentity": {
    "arn": "arn:aws:appstream:us-east-1: 123456789012:image-builder/ExampleImageBuilder",
    "accountId": "123456789012"
  },
  "eventTime": "2019-03-21T22:32:05Z",
  "eventSource": "appstream.amazonaws.com",
  "eventName": "CreateImage",
  "awsRegion": "us-east-1",
  "requestParameters": null,
  "responseElements": null,
  "eventID": "12b2d6e2-c9a9-402e-8886-2c388d3df610",
  "readOnly": false,
  "eventType": "AwsServiceEvent",
  "recipientAccountId": "123456789012",
  "serviceEventDetails": {
    "ImageName": "ExampleImage1",
    "ImagePlatform": "WINDOWS",
    "PublicBaseImageReleasedDate": "Tue Jan 15 22:19:56 UTC 2019",
    "ImageDisPlayName": "Example Image 1",
    "ImageBuilderSupported": "True",
    "ImageCreatedTime": "Thu Mar 21 22:32:05 UTC 2019",
    "ImageDescription": "Example image for testing",
    "ImageState": "PENDING"
  }
}
```