terraform.aws-baseline-infra/modules/ManagementGovernance/Monitoring.NLB/main.tf

/*
data "external" "nlb-targetgroups" {
  program = ["bash", "${path.module}/list-nlb-targetgroups.sh"]
  query = {
    parameter = var.load-balancer
  }
}
*/


module "nlb-targetgroups" {
  source        = "../../util/resource-list"
  resource-type = "nlb-targetgroups"
  query-input   = var.load-balancer
}

resource "aws_cloudwatch_metric_alarm" "nlb-HealthyHostCount" {
  for_each                  = module.nlb-targetgroups.result-set
  alarm_name                = "NLBTG:HealthyHostCount:${split(":", each.value)[5]}"
  comparison_operator       = "LessThanThreshold"
  evaluation_periods        = "1"
  metric_name               = "HealthyHostCount"
  period                    = "300"
  statistic                 = "Minimum"
  threshold                 = var.threshold-HealthHostCountMin
  alarm_description         = "NLBTG:HealthyHostCount"
  namespace                 = "AWS/NetworkELB"
  insufficient_data_actions = []
  actions_enabled           = "true"
  alarm_actions             = [var.alarm-actions-emergency]
  ok_actions                = [var.alarm-actions-emergency]
  dimensions = {
    TargetGroup  = split(":", each.value)[5]
    LoadBalancer = "net/${split("/", var.load-balancer)[2]}/${split("/", var.load-balancer)[3]}"
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}