Terraform Module for AWS EFS Cloudwatch Alarms

This Terraform module manages Cloudwatch Alarms for an Elastic File System. It does NOT create or manage EFS, only Metric Alarms.

Requires:

• AWS Provider
• Terraform 0.12

Alarms Created

Alarms Always Created:

• Disk burst balance less than 100 GB
• IO Percentage above 90%
• Anomalous client connection count
• Anomalous IO pattern (bytes)

Estimated Operating Cost: $ 0.80 / month

• $ 0.10 / month for Metric Alarms (2x)
• $ 0.30 / month for Anomaly Alarm (2x)

Example

resource "aws_efs_file_system" "default" {
  creation_token = "my-filesystem"
}

module "aws-efs-alarms" {
  source            = "lorenzoaiello/efs-alarms/aws"
  version           = "x.y.z"
  efs_id            = aws_efs_file_system.default.id
}

Variables

Name	Description	Type	Default	Required
actions_alarm	A list of actions to take when alarms are triggered. Will likely be an SNS topic for event distribution.	list	[]	no
actions_ok	A list of actions to take when alarms are cleared. Will likely be an SNS topic for event distribution.	list	[]	no
anomaly_period	The number of seconds that make each evaluation period for anomaly detection.	string	"600"	no
efs_id	EFS ID	string	n/a	yes
evaluation_period	The evaluation period over which to use when triggering alarms.	string	"5"	no
prefix	Alarm Name Prefix	string	""	no
statistic_period	The number of seconds that make each statistic period.	string	"60"	no

Outputs

Name	Description
alarm_anomalous_client_connections	The CloudWatch Metric Alarm resource block for anomalous Client Connection Count
alarm_anomalous_io_bytes	The CloudWatch Metric Alarm resource block for anomalous IO Bytes
alarm_burst_balance_too_low	The CloudWatch Metric Alarm resource block for low Disk Burst Balance
alarm_io_percentage_too_high	The CloudWatch Metric Alarm resource block for high IO Percentage