Terraform AWS CloudTrail

This module creates AWS CloudTrail and configures it so that logs go to cloudwatch.

Usage

module "aws_cloudtrail" {
    source             = "trussworks/cloudtrail/aws"
    s3_bucket_name     = "my-company-cloudtrail-logs"
    log_retention_days = 90
}

Upgrade Instructions for v2 -> v3

Starting in v3, encryption is not optional and will be on for both logs delivered to S3 and Cloudwatch Logs. The KMS key resource created this module will be used to encrypt both S3 and Cloudwatch-based logs.

Because of this change, remove the encrypt_cloudtrail parameter from previous invocations of the module prior to upgrading the version.

Requirements

Name	Version
terraform	>= 1.0
aws	>= 3.0

Providers

Name	Version
aws	>= 3.0

Modules

No modules.

Resources

Name	Type
aws_cloudtrail.main	resource
aws_cloudwatch_log_group.cloudtrail	resource
aws_iam_policy.cloudtrail_cloudwatch_logs	resource
aws_iam_policy_attachment.main	resource
aws_iam_role.cloudtrail_cloudwatch_role	resource
aws_kms_alias.cloudtrail	resource
aws_kms_key.cloudtrail	resource
aws_caller_identity.current	data source
aws_iam_policy_document.cloudtrail_assume_role	data source
aws_iam_policy_document.cloudtrail_cloudwatch_logs	data source
aws_iam_policy_document.cloudtrail_kms_policy_doc	data source
aws_partition.current	data source
aws_region.current	data source

Inputs

Name	Description	Type	Default	Required
api_call_rate_insight	A measurement of write-only management API calls that occur per minute against a baseline API call volume.	`bool`	`false`	no
api_error_rate_insight	A measurement of management API calls that result in error codes. The error is shown if the API call is unsuccessful.	`bool`	`false`	no
cloudwatch_log_group_name	The name of the CloudWatch Log Group that receives CloudTrail events.	`string`	`"cloudtrail-events"`	no
enabled	Enables logging for the trail. Defaults to true. Setting this to false will pause logging.	`bool`	`true`	no
iam_policy_name	Name for the CloudTrail IAM policy	`string`	`"cloudtrail-cloudwatch-logs-policy"`	no
iam_role_name	Name for the CloudTrail IAM role	`string`	`"cloudtrail-cloudwatch-logs-role"`	no
key_deletion_window_in_days	Duration in days after which the key is deleted after destruction of the resource, must be 7-30 days. Default 30 days.	`string`	`30`	no
log_retention_days	Number of days to keep AWS logs around in specific log group.	`string`	`90`	no
org_trail	Whether or not this is an organization trail. Only valid in master account.	`string`	`"false"`	no
s3_bucket_name	The name of the AWS S3 bucket.	`string`	n/a	yes
s3_key_prefix	S3 key prefix for CloudTrail logs	`string`	`"cloudtrail"`	no
sns_topic_arn	ARN of the SNS topic for notification of log file delivery.	`string`	`""`	no
tags	A mapping of tags to CloudTrail resources.	`map(string)`	`{}`	no
trail_name	Name for the Cloudtrail	`string`	`"cloudtrail"`	no

Outputs

Name	Description
cloudtrail_arn	CloudTrail ARN
cloudtrail_home_region	CloudTrail Home Region
cloudtrail_id	CloudTrail ID

Developer Setup

Install dependencies (macOS)

brew install pre-commit go terraform terraform-docs

License

terraform-contrib/terraform-aws-cloudtrail

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