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DocumentDB logs export should be enabled

Default Severity: medium

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 aws-documentdb-enable-log-export check. 

 resource "aws_docdb_cluster" "bad_example" {
   cluster_identifier      = "my-docdb-cluster"
   engine                  = "docdb"
   master_username         = "foo"
   master_password         = "mustbeeightchars"
   backup_retention_period = 5
   preferred_backup_window = "07:00-09:00"
   skip_final_snapshot     = true
   enabled_cloudwatch_logs_exports = "something"
 }

Secure Example

The following example will pass the aws-documentdb-enable-log-export check. 

 resource "aws_docdb_cluster" "good_example" {
   cluster_identifier      = "my-docdb-cluster"
   engine                  = "docdb"
   master_username         = "foo"
   master_password         = "mustbeeightchars"
   backup_retention_period = 5
   preferred_backup_window = "07:00-09:00"
   skip_final_snapshot     = true
   enabled_cloudwatch_logs_exports = "audit"
 }