cloudwatch-alarms.tf

resource "aws_cloudwatch_metric_alarm" "high_memory" {
  count = length(var.alarm_sns_topics) > 0 ? 1 : 0

  alarm_name          = "${try(data.aws_iam_account_alias.current[0].account_alias, var.alarm_prefix)}-ecs-${var.cluster_name}-${var.name}-high-memory"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = "3"
  metric_name         = "MemoryUtilization"
  namespace           = "AWS/ECS"
  period              = "300"
  statistic           = "Maximum"
  threshold           = "80"
  alarm_description   = "Cluster node memory above threshold"
  alarm_actions       = var.alarm_sns_topics
  ok_actions          = var.alarm_sns_topics

  dimensions = {
    ClusterName = var.cluster_name
    ServiceName = aws_ecs_service.default.name
  }
}

resource "aws_cloudwatch_metric_alarm" "high_cpu" {
  count = length(var.alarm_sns_topics) > 0 ? 1 : 0

  alarm_name          = "${try(data.aws_iam_account_alias.current[0].account_alias, var.alarm_prefix)}-ecs-${var.cluster_name}-${var.name}-high-cpu"
  comparison_operator = "GreaterThanOrEqualToThreshold"
  evaluation_periods  = "3"
  metric_name         = "CPUUtilization"
  namespace           = "AWS/ECS"
  period              = "300"
  statistic           = "Maximum"
  threshold           = "80"
  alarm_description   = "ECS service CPU utilization above threshold"
  alarm_actions       = var.alarm_sns_topics
  ok_actions          = var.alarm_sns_topics

  dimensions = {
    ClusterName = var.cluster_name
    ServiceName = aws_ecs_service.default.name
  }
}