Logging AWS Mainframe Modernization API calls using AWS CloudTrail

AWS Mainframe Modernization is integrated with AWS CloudTrail, a service that provides a record of actions taken by a user, role, or an AWS service in AWS Mainframe Modernization. CloudTrail captures all API calls for AWS Mainframe Modernization as events. The calls captured include calls from the AWS Mainframe Modernization console and code calls to the AWS Mainframe Modernization API operations. If you create a trail, you can enable continuous delivery of CloudTrail events to an Amazon S3 bucket, including events for AWS Mainframe Modernization. If you don't configure a trail, you can still view the most recent events in the CloudTrail console in Event history. Using the information collected by CloudTrail, you can determine the request that was made to AWS Mainframe Modernization, the IP address from which the request was made, who made the request, when it was made, and additional details.

To learn more about CloudTrail, see the AWS CloudTrail User Guide.

AWS Mainframe Modernization information in CloudTrail

CloudTrail is enabled on your AWS account when you create the account. When activity occurs in AWS Mainframe Modernization, that activity is recorded in a CloudTrail event along with other AWS service events in Event history. You can view, search, and download recent events in your AWS account. For more information, see Viewing Events with CloudTrail Event History.

For an ongoing record of events in your AWS account, including events for AWS Mainframe Modernization, create a trail. A trail enables CloudTrail to deliver log files to an Amazon S3 bucket. By default, when you create a trail in the console, the trail applies to all AWS Regions. The trail logs events from all Regions in the AWS partition and delivers the log files to the Amazon S3 bucket that you specify. Additionally, you can configure other AWS services to further analyze and act upon the event data collected in CloudTrail logs. For more information, see the following:

All AWS Mainframe Modernization actions are logged by CloudTrail and are documented in the AWS Mainframe Modernization API Reference. For example, calls to the CreateApplication, CreateEnvironment and CreateDeployment actions generate entries in the CloudTrail log files.

Every event or log entry contains information about who generated the request. The identity information helps you determine the following:

For more information, see the CloudTrail userIdentity element.

Understanding AWS Mainframe Modernization log file entries

A trail is a configuration that enables delivery of events as log files to an Amazon 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 aren't an ordered stack trace of the public API calls, so they don't appear in any specific order.

The following example shows a CloudTrail log entry that demonstrates the CreateApplication action.

{
    "eventVersion": "1.08",
    "userIdentity": {
        "type": "AssumedRole",
        "principalId": "AROAII6WZTHGYAEXAMPLE",
        "arn": "arn:aws:sts::444455556666:assumed-role/Admin/Mary_Major",
        "accountId": "444455556666",
        "accessKeyId": "AKIAIOSFODNN7EXAMPLE",
        "sessionContext": {
            "sessionIssuer": {
                "type": "Role",
                "principalId": "AROAII6WZTHGYAEXAMPLE",
                "arn": "arn:aws:iam::444455556666:role/Admin",
                "accountId": "444455556666",
                "userName": "Admin"
            },
            "webIdFederationData": {},
            "attributes": {
                "creationDate": "2022-06-01T20:38:22Z",
                "mfaAuthenticated": "false"
            }
        }
    },
    "eventTime": "2022-06-01T20:40:39Z",
    "eventSource": "m2.amazonaws.com",
    "eventName": "CreateApplication",
    "awsRegion": "us-east-1",
    "sourceIPAddress": "72.21.196.65",
    "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Firefox/91.0",
    "requestParameters": {
        "clientToken": "1abc23de-f45g-6789-h01i-jkl2m3456789",
        "name": "MyApp",
        "description": "",
        "engineType": "microfocus",
        "definition": {
            "content": "{}"
        },
        "tags": {}
    },
    "responseElements": {
        "applicationVersion": 1,
        "Access-Control-Expose-Headers": "x-amzn-RequestId,x-amzn-ErrorType,x-amzn-ErrorMessage,Date",
        "applicationArn": "arn:aws:m2:us-east-1:444455556666:app/lsfhmwhw7fffrosff2lncwqcua",
        "applicationId": "lsfhmwhw7fffrosff2lncwqcua"
    },
    "requestID": "36982d38-fcde-4bfe-a89a-7bd78d43c926",
    "eventID": "d7f0fc36-46ae-4157-9a79-c79f385fda98",
    "readOnly": false,
    "eventType": "AwsApiCall",
    "managementEvent": true,
    "recipientAccountId": "444455556666",
    "eventCategory": "Management"
}