Namespace Amazon.CDK.AWS.CloudTrail

AWS CloudTrail Construct Library

Trail

AWS CloudTrail enables governance, compliance, and operational and risk auditing of your AWS account. Actions taken by a user, role, or an AWS service are recorded as events in CloudTrail. Learn more at the CloudTrail documentation.

The Trail construct enables ongoing delivery of events as log files to an Amazon S3 bucket. Learn more about Creating a Trail for Your AWS Account. The following code creates a simple CloudTrail for your account -

var trail = new Trail(this, "CloudTrail");

By default, this will create a new S3 Bucket that CloudTrail will write to, and choose a few other reasonable defaults such as turning on multi-region and global service events. The defaults for each property and how to override them are all documented on the TrailProps interface.

Log File Validation

In order to validate that the CloudTrail log file was not modified after CloudTrail delivered it, CloudTrail provides a digital signature for each file. Learn more at Validating CloudTrail Log File Integrity.

This is enabled on the Trail construct by default, but can be turned off by setting enableFileValidation to false.

var trail = new Trail(this, "CloudTrail", new TrailProps {
    EnableFileValidation = false
});

Notifications

Amazon SNS notifications can be configured upon new log files containing Trail events are delivered to S3. Learn more at Configuring Amazon SNS Notifications for CloudTrail. The following code configures an SNS topic to be notified -

var topic = new Topic(this, "TrailTopic");
var trail = new Trail(this, "CloudTrail", new TrailProps {
    SnsTopic = topic
});

Service Integrations

Besides sending trail events to S3, they can also be configured to notify other AWS services -

Amazon CloudWatch Logs

CloudTrail events can be delivered to a CloudWatch Logs LogGroup. By default, a new LogGroup is created with a default retention setting. The following code enables sending CloudWatch logs but specifies a particular retention period for the created Log Group.

using Amazon.CDK.AWS.Logs;


var trail = new Trail(this, "CloudTrail", new TrailProps {
    SendToCloudWatchLogs = true,
    CloudWatchLogsRetention = RetentionDays.FOUR_MONTHS
});

If you would like to use a specific log group instead, this can be configured via cloudwatchLogGroup.

Amazon EventBridge

Amazon EventBridge rules can be configured to be triggered when CloudTrail events occur using the Trail.onEvent() API. Using APIs available in aws-events, these events can be filtered to match to those that are of interest, either from a specific service, account or time range. See Events delivered via CloudTrail to learn more about the event structure for events from CloudTrail.

The following code filters events for S3 from a specific AWS account and triggers a lambda function.

var myFunctionHandler = new Function(this, "MyFunction", new FunctionProps {
    Code = Code.FromAsset("resource/myfunction"),
    Runtime = Runtime.NODEJS_LATEST,
    Handler = "index.handler"
});

var eventRule = Trail.OnEvent(this, "MyCloudWatchEvent", new OnEventOptions {
    Target = new LambdaFunction(myFunctionHandler)
});

eventRule.AddEventPattern(new EventPattern {
    Account = new [] { "123456789012" },
    Source = new [] { "aws.s3" }
});

Multi-Region & Global Service Events

By default, a Trail is configured to deliver log files from multiple regions to a single S3 bucket for a given account. This creates shadow trails (replication of the trails) in all of the other regions. Learn more about How CloudTrail Behaves Regionally and about the IsMultiRegion property.

For most services, events are recorded in the region where the action occurred. For global services such as AWS IAM, AWS STS, Amazon CloudFront, Route 53, etc., events are delivered to any trail that includes global services. Learn more About Global Service Events.

Events for global services are turned on by default for Trail constructs in the CDK.

The following code disables multi-region trail delivery and trail delivery for global services for a specific Trail -

var trail = new Trail(this, "CloudTrail", new TrailProps {
    // ...
    IsMultiRegionTrail = false,
    IncludeGlobalServiceEvents = false
});

Events Types

Management events provide information about management operations that are performed on resources in your AWS account. These are also known as control plane operations. Learn more about Management Events.

By default, a Trail logs all management events. However, they can be configured to either be turned off, or to only log 'Read' or 'Write' events.

The following code configures the Trail to only track management events that are of type 'Read'.

var trail = new Trail(this, "CloudTrail", new TrailProps {
    // ...
    ManagementEvents = ReadWriteType.READ_ONLY
});

Data events provide information about the resource operations performed on or in a resource. These are also known as data plane operations. Learn more about Data Events. By default, no data events are logged for a Trail.

AWS CloudTrail supports data event logging for Amazon S3 objects and AWS Lambda functions.

The logAllS3DataEvents() API configures the trail to log all S3 data events while the addS3EventSelector() API can be used to configure logging of S3 data events for specific buckets and specific object prefix. The following code configures logging of S3 data events for fooBucket and with object prefix bar/.

using Amazon.CDK.AWS.S3;
Bucket bucket;


var trail = new Trail(this, "MyAmazingCloudTrail");

// Adds an event selector to the bucket foo
trail.AddS3EventSelector(new [] { new S3EventSelector {
    Bucket = bucket,
    ObjectPrefix = "bar/"
} });

Similarly, the logAllLambdaDataEvents() configures the trail to log all Lambda data events while the addLambdaEventSelector() API can be used to configure logging for specific Lambda functions. The following code configures logging of Lambda data events for a specific Function.

var trail = new Trail(this, "MyAmazingCloudTrail");
var amazingFunction = new Function(this, "AnAmazingFunction", new FunctionProps {
    Runtime = Runtime.NODEJS_LATEST,
    Handler = "hello.handler",
    Code = Code.FromAsset("lambda")
});

// Add an event selector to log data events for the provided Lambda functions.
trail.AddLambdaEventSelector(new [] { amazingFunction });

Organization Trail

It is possible to create a trail that will be applied to all accounts in an organization if the current account manages an organization. To enable this, the property isOrganizationTrail must be set. If this property is set and the current account does not manage an organization, the stack will fail to deploy.

new Trail(this, "OrganizationTrail", new TrailProps {
    IsOrganizationTrail = true
});

CloudTrail Insights

Set InsightSelector to enable Insight. Insights selector values can be ApiCallRateInsight, ApiErrorRateInsight, or both.

new Trail(this, "Insights", new TrailProps {
    InsightTypes = new [] { InsightType.API_CALL_RATE, InsightType.API_ERROR_RATE }
});

Classes

AddEventSelectorOptions	Options for adding an event selector.
CfnChannel	Contains information about a returned CloudTrail channel.
CfnChannel.DestinationProperty	Contains information about the destination receiving events.
CfnChannelProps	Properties for defining a `CfnChannel`.
CfnEventDataStore	Creates a new event data store.
CfnEventDataStore.AdvancedEventSelectorProperty	Advanced event selectors let you create fine-grained selectors for AWS CloudTrail management, data, and network activity events.
CfnEventDataStore.AdvancedFieldSelectorProperty	A single selector statement in an advanced event selector.
CfnEventDataStore.InsightSelectorProperty	A JSON string that contains a list of Insights types that are logged on an event data store.
CfnEventDataStoreProps	Properties for defining a `CfnEventDataStore`.
CfnResourcePolicy	Attaches a resource-based permission policy to a CloudTrail channel that is used for an integration with an event source outside of AWS .
CfnResourcePolicyProps	Properties for defining a `CfnResourcePolicy`.
CfnTrail	Creates a trail that specifies the settings for delivery of log data to an Amazon S3 bucket.
CfnTrail.AdvancedEventSelectorProperty	Advanced event selectors let you create fine-grained selectors for AWS CloudTrail management, data, and network activity events.
CfnTrail.AdvancedFieldSelectorProperty	A single selector statement in an advanced event selector.
CfnTrail.DataResourceProperty	You can configure the `DataResource` in an `EventSelector` to log data events for the following three resource types:.
CfnTrail.EventSelectorProperty	Use event selectors to further specify the management and data event settings for your trail.
CfnTrail.InsightSelectorProperty	A JSON string that contains a list of Insights types that are logged on a trail.
CfnTrailProps	Properties for defining a `CfnTrail`.
DataResourceType	Resource type for a data event.
InsightType	Util element for InsightSelector.
ManagementEventSources	Types of management event sources that can be excluded.
ReadWriteType	Types of events that CloudTrail can log.
S3EventSelector	Selecting an S3 bucket and an optional prefix to be logged for data events.
Trail	Cloud trail allows you to log events that happen in your AWS account For example:.
TrailProps	Properties for an AWS CloudTrail trail.

Interfaces

CfnChannel.IDestinationProperty	Contains information about the destination receiving events.
CfnEventDataStore.IAdvancedEventSelectorProperty	Advanced event selectors let you create fine-grained selectors for AWS CloudTrail management, data, and network activity events.
CfnEventDataStore.IAdvancedFieldSelectorProperty	A single selector statement in an advanced event selector.
CfnEventDataStore.IInsightSelectorProperty	A JSON string that contains a list of Insights types that are logged on an event data store.
CfnTrail.IAdvancedEventSelectorProperty	Advanced event selectors let you create fine-grained selectors for AWS CloudTrail management, data, and network activity events.
CfnTrail.IAdvancedFieldSelectorProperty	A single selector statement in an advanced event selector.
CfnTrail.IDataResourceProperty	You can configure the `DataResource` in an `EventSelector` to log data events for the following three resource types:.
CfnTrail.IEventSelectorProperty	Use event selectors to further specify the management and data event settings for your trail.
CfnTrail.IInsightSelectorProperty	A JSON string that contains a list of Insights types that are logged on a trail.
IAddEventSelectorOptions	Options for adding an event selector.
ICfnChannelProps	Properties for defining a `CfnChannel`.
ICfnEventDataStoreProps	Properties for defining a `CfnEventDataStore`.
ICfnResourcePolicyProps	Properties for defining a `CfnResourcePolicy`.
ICfnTrailProps	Properties for defining a `CfnTrail`.
IS3EventSelector	Selecting an S3 bucket and an optional prefix to be logged for data events.
ITrailProps	Properties for an AWS CloudTrail trail.