DocumentDB logs export should be enabled

Explanation

Document DB does not have auditing by default. To ensure that you are able to accurately audit the usage of your DocumentDB cluster you should enable export logs.

Possible Impact

Limited visibility of audit trail for changes to the DocumentDB

Suggested Resolution

Enable export logs

Insecure Example

The following example will fail the AVD-AWS-0020 check.

---
 Resources:
  BadExample:
    Type: "AWS::DocDB::DBCluster"
    Properties:
      BackupRetentionPeriod: 8
      DBClusterIdentifier: sample-cluster
      DBClusterParameterGroupName: default.docdb3.6
  BadInstanceExample:
    Type: "AWS::DocDB::DBInstance"
    Properties:
      AutoMinorVersionUpgrade: true
      AvailabilityZone: us-east-1c
      DBClusterIdentifier: sample-cluster
      DBInstanceClass: db.r5.large
      DBInstanceIdentifier: sample-cluster-instance-0
      PreferredMaintenanceWindow: 'sat:06:54-sat:07:24'

Secure Example

The following example will pass the AVD-AWS-0020 check.

---
Resources:
  GoodExample:
    Type: "AWS::DocDB::DBCluster"
    Properties:
      BackupRetentionPeriod : 8
      DBClusterIdentifier : "sample-cluster"
      DBClusterParameterGroupName : "default.docdb3.6"
      KmsKeyId : "your-kms-key-id"
      EnableCloudwatchLogsExports:
      - audit
      - profiler
  InstanceInstanceExample:
    Type: "AWS::DocDB::DBInstance"
    Properties:
      AutoMinorVersionUpgrade: true
      AvailabilityZone: "us-east-1c"
      DBClusterIdentifier: "sample-cluster"
      DBInstanceClass: "db.r5.large"
      DBInstanceIdentifier: "sample-cluster-instance-0"
      PreferredMaintenanceWindow: "sat:06:54-sat:07:24"


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