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

data "aws_autoscaling_group" "asg" {
  name     = var.asg-name
}

resource "aws_cloudwatch_metric_alarm" "asg-CPUUtilization" {
  alarm_name                = "${var.settings.CPUUtilization.ecccode}-ASG_${var.asg-name}-CPUUtilization"
  comparison_operator       = var.settings.CPUUtilization.comparison_operator
  evaluation_periods        = var.settings.CPUUtilization.evaluation_periods
  metric_name               = "CPUUtilization"
  period                    = var.settings.CPUUtilization.period
  statistic                 = var.settings.CPUUtilization.statistic
  threshold                 = var.settings.CPUUtilization.threshold
  alarm_description         = "ASG:CPUUtilization"
  namespace                 = "AWS/EC2"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.settings.CPUUtilization.action]
  ok_actions                = [var.settings.CPUUtilization.action]
  dimensions = {
    AutoScalingGroupName =var.asg-name
  }
}

resource "aws_cloudwatch_metric_alarm" "asg-GroupInServiceCapacity" {
  alarm_name                = "${var.settings.GroupInServiceCapacity.ecccode}-ASG_${var.asg-name}-GroupInServiceCapacity"
  comparison_operator       = "LessThanThreshold"
  evaluation_periods        = var.settings.GroupInServiceCapacity.evaluation_periods
  metric_name               = "GroupInServiceCapacity"
  period                    = var.settings.GroupInServiceCapacity.period
  statistic                 = "Minimum"
  threshold                 = data.aws_autoscaling_group.asg.min_size
  alarm_description         = "ASG:GroupInServiceCapacity"
  namespace                 = "AWS/AutoScaling"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.settings.GroupInServiceCapacity.action]
  ok_actions                = [var.settings.GroupInServiceCapacity.action]
  dimensions = {
    AutoScalingGroupName = var.asg-name
  }
}