Terraform Module for AWS ALB Cloudwatch Alarms
This Terraform module manages Cloudwatch Alarms for an ALB in the region. It does NOT create or manage Load Balancers, only Metric Alarms.
Requires:
- AWS Provider
- Terraform 0.12
Alarms Created
Alarms Always Created:
- Any 5xx errors from the target group
- Any 5xx errors from the load balancer
- Unacceptably high average response times
Estimated Operating Cost: $ 0.30 / month
- $ 0.10 / month for Metric Alarms (3x)
Example
module "aws-alb-alarms" {
source = "lorenzoaiello/alb-alarms/aws"
version = "x.y.z"
}
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 |
| evaluation_period | The evaluation period over which to use when triggering alarms. | string |
"5" |
no |
| load_balancer_id | ALB ID | string |
n/a | yes |
| prefix | Alarm Name Prefix | string |
"" |
no |
| response_time_threshold | The average number of milliseconds that requests should complete within. | string |
"50" |
no |
| statistic_period | The number of seconds that make each statistic period. | string |
"60" |
no |
| target_group_id | Target Group ID | string |
n/a | yes |
Outputs
| Name | Description |
|---|---|
| alarm_httpcode_lb_5xx_count | The CloudWatch Metric Alarm resource block for 5xx errors on the load balancer |
| alarm_httpcode_target_5xx_counts | The CloudWatch Metric Alarm resource block for 5xx errors on the target group |
| alarm_target_response_time_average | The CloudWatch Metric Alarm resource block for unacceptably high response time averages |