AWS ELB Cloudwatch

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
• Number of unhealthy hosts
• Number of healthy hosts

Estimated Operating Cost: $ 0.50 / month

• $ 0.10 / month for Metric Alarms (5x)

Example

module "aws-alb-alarms" {
  source            = "lorenzoaiello/alb-alarms/aws"
  version           = "x.y.z"
}

Pro Support

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• Email support
• Zoom Calls
• Implementation Guidance

Providers

Name	Version
aws	n/a

Inputs

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(string)	[]	no
actions_ok	A list of actions to take when alarms are cleared. Will likely be an SNS topic for event distribution.	list(string)	[]	no
evaluation_period	The evaluation period over which to use when triggering alarms.	string	"5"	no
healthy_hosts_threshold	The number of healthy hosts.	string	"0"	no
load_balancer_arn	ELB ARN	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_arn	Target Group ARN	string	n/a	yes
unhealthy_hosts_threshold	The number of unhealthy hosts.	string	"0"	no

Resources

Name	Type
aws_cloudwatch_metric_alarm.healthy_hosts	resource
aws_cloudwatch_metric_alarm.httpcode_lb_5xx_count	resource
aws_cloudwatch_metric_alarm.httpcode_target_5xx_count	resource
aws_cloudwatch_metric_alarm.target_response_time_average	resource
aws_cloudwatch_metric_alarm.unhealthy_hosts	resource

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