alerts.tf

resource "aws_cloudwatch_metric_alarm" "CPUUtilization_alarm" {
  alarm_name                = "${var.app}-cpu-${var.environment}"
  comparison_operator       = "GreaterThanOrEqualToThreshold"
  evaluation_periods        = "2"
  metric_name               = "CPUUtilization"
  namespace                 = "AWS/ECS"
  period                    = "120"
  statistic                 = "Average"
  threshold                 = var.cpu_alert_threshold
  alarm_description         = "This metric monitors ECS CPU utilization for ${var.app}"
  alarm_actions             = var.alert_actions
  ok_actions                = var.alert_actions
  insufficient_data_actions = []
  treat_missing_data        = "notBreaching"
  dimensions = {
    ServiceName = "${aws_ecs_cluster.app.name}"
    ClusterName = "${aws_ecs_service.app.name}"
  }
}

resource "aws_cloudwatch_metric_alarm" "MemoryUtilization_alarm" {
  alarm_name                = "${var.app}-memory-${var.environment}"
  comparison_operator       = "GreaterThanOrEqualToThreshold"
  evaluation_periods        = "2"
  metric_name               = "MemoryUtilization"
  namespace                 = "AWS/ECS"
  period                    = "120"
  statistic                 = "Average"
  threshold                 = var.memory_alert_threshold
  alarm_description         = "This metric monitors ECS memory utilization for ${var.app}"
  alarm_actions             = var.alert_actions
  ok_actions                = var.alert_actions
  insufficient_data_actions = []
  treat_missing_data        = "notBreaching"
  dimensions = {
    ServiceName = "${aws_ecs_cluster.app.name}"
    ClusterName = "${aws_ecs_service.app.name}"
  }
}

resource "aws_cloudwatch_metric_alarm" "HTTPCode_ELB_5XX_Count_alarm" {
  alarm_name                = "${var.app}-http5xx-${var.environment}"
  comparison_operator       = "GreaterThanThreshold"
  evaluation_periods        = "1"
  metric_name               = "HTTPCode_Target_5XX_Count"
  namespace                 = "AWS/ApplicationELB"
  period                    = "300"
  statistic                 = "Sum"
  threshold                 = var.HTTPCode_ELB_5XX_threshold
  alarm_description         = "HTTP 5XX alarm for over 25 counts within 5 minutes for ${var.app}"
  alarm_actions             = var.alert_actions
  ok_actions                = var.alert_actions
  insufficient_data_actions = []
  treat_missing_data        = "notBreaching"
  dimensions = {
    LoadBalancer = "${aws_alb.main[0].arn_suffix}"
  }
}