# About AWS CodeBuild log file entries
<a name="understanding-service-name-entries"></a>

A trail is a configuration that enables delivery of events as log files to an S3 bucket that you specify. CloudTrail log files contain one or more log entries. An event represents a single request from any source and includes information about the requested action, the date and time of the action, request parameters, and so on. CloudTrail log files are not an ordered stack trace of the public API calls, so they do not appear in any specific order. 

**Note**  
 To protect sensitive information, the following are hidden in CodeBuild logs:   
 AWS access key IDs. For more information, see [Managing Access Keys for IAM Users](https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_access-keys.html) in the *AWS Identity and Access Management User Guide*. 
 Strings specified using the Parameter Store. For more information, see [Systems Manager Parameter Store](https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-paramstore.html) and [Systems Manager Parameter Store Console Walkthrough](https://docs.aws.amazon.com/systems-manager/latest/userguide/sysman-paramstore-walk.html#sysman-paramstore-console) in the *Amazon EC2 Systems Manager User Guide*. 
 Strings specified using AWS Secrets Manager. For more information, see [Key management](security-key-management.md). 

The following example shows a CloudTrail log entry that demonstrates creating a build project in CodeBuild.

```
{    
  "eventVersion": "1.05",   
  "userIdentity": {       
    "type": "FederatedUser",       
    "principalId": "account-ID:user-name",       
    "arn": "arn:aws:sts::account-ID:federated-user/user-name",       
    "accountId": "account-ID",       
    "accessKeyId": "access-key-ID",       
    "sessionContext": {
      "attributes": {
        "mfaAuthenticated": "false",
        "creationDate": "2016-09-06T17:59:10Z"
      },
      "sessionIssuer": {
        "type": "IAMUser",
        "principalId": "access-key-ID",
        "arn": "arn:aws:iam::account-ID:user/user-name",
        "accountId": "account-ID",
        "userName": "user-name"
      }       
    }   
  },   
  "eventTime": "2016-09-06T17:59:11Z",   
  "eventSource": "codebuild.amazonaws.com",   
  "eventName": "CreateProject",   
  "awsRegion": "region-ID",   
  "sourceIPAddress": "127.0.0.1",   
  "userAgent": "user-agent",   
  "requestParameters": {       
    "awsActId": "account-ID"   
  },   
  "responseElements": {       
    "project": {
      "environment": {
        "image": "image-ID",
        "computeType": "BUILD_GENERAL1_SMALL",
        "type": "LINUX_CONTAINER",
        "environmentVariables": []
      },
      "name": "codebuild-demo-project",
      "description": "This is my demo project",
      "arn": "arn:aws:codebuild:region-ID:account-ID:project/codebuild-demo-project:project-ID",
      "encryptionKey": "arn:aws:kms:region-ID:key-ID",
      "timeoutInMinutes": 10,
      "artifacts": {
        "location": "arn:aws:s3:::codebuild-region-ID-account-ID-output-bucket",
        "type": "S3",
        "packaging": "ZIP",
        "outputName": "MyOutputArtifact.zip"
      }, 
      "serviceRole": "arn:aws:iam::account-ID:role/CodeBuildServiceRole",
      "lastModified": "Sep 6, 2016 10:59:11 AM",
      "source": {      
        "type": "GITHUB",
        "location": "https://github.com/my-repo.git"
      },
      "created": "Sep 6, 2016 10:59:11 AM"       
    }   
  },   
  "requestID": "9d32b228-745b-11e6-98bb-23b67EXAMPLE",   
  "eventID": "581f7dd1-8d2e-40b0-aeee-0dbf7EXAMPLE",   
  "eventType": "AwsApiCall",   
  "recipientAccountId": "account-ID" 
}
```