policyDocument

Specify the policy, in JSON.

Data protection policy

A data protection policy must include two JSON blocks:

• The first block must include both a DataIdentifer array and an Operation property with an Audit action. The DataIdentifer array lists the types of sensitive data that you want to mask. For more information about the available options, see Types of data that you can mask.The Operation property with an Audit action is required to find the sensitive data terms. This Audit action must contain a FindingsDestination object. You can optionally use that FindingsDestination object to list one or more destinations to send audit findings to. If you specify destinations such as log groups, Kinesis Data Firehose streams, and S3 buckets, they must already exist.

• The second block must include both a DataIdentifer array and an Operation property with an Deidentify action. The DataIdentifer array must exactly match the DataIdentifer array in the first block of the policy.The Operation property with the Deidentify action is what actually masks the data, and it must contain the "MaskConfig": {} object. The "MaskConfig": {} object must be empty.

For an example data protection policy, see the Examples section on this page.

The contents of the two DataIdentifer arrays must match exactly.

In addition to the two JSON blocks, the policyDocument can also include Name, Description, and Version fields. The Name is different than the operation's policyName parameter, and is used as a dimension when CloudWatch Logs reports audit findings metrics to CloudWatch.

The JSON specified in policyDocument can be up to 30,720 characters long.

Subscription filter policy

A subscription filter policy can include the following attributes in a JSON block:

• DestinationArn The ARN of the destination to deliver log events to. Supported destinations are:

• An Kinesis Data Streams data stream in the same account as the subscription policy, for same-account delivery.

• An Kinesis Data Firehose data stream in the same account as the subscription policy, for same-account delivery.

• A Lambda function in the same account as the subscription policy, for same-account delivery.

• A logical destination in a different account created with PutDestination, for cross-account delivery. Kinesis Data Streams and Kinesis Data Firehose are supported as logical destinations.

• RoleArn The ARN of an IAM role that grants CloudWatch Logs permissions to deliver ingested log events to the destination stream. You don't need to provide the ARN when you are working with a logical destination for cross-account delivery.

• FilterPattern A filter pattern for subscribing to a filtered stream of log events.

• DistributionThe method used to distribute log data to the destination. By default, log data is grouped by log stream, but the grouping can be set to Random for a more even distribution. This property is only applicable when the destination is an Kinesis Data Streams data stream.