cloud_watch_alarm.tf

# Restart dead or hung instance

locals {
  action = "arn:aws:swf:${local.region}:${data.aws_caller_identity.default.account_id}:${var.default_alarm_action}"
}

resource "aws_cloudwatch_metric_alarm" "default" {
  count               = local.instance_count
  alarm_name          = "${module.label.id}-${count.index}"
  comparison_operator = var.comparison_operator
  evaluation_periods  = var.evaluation_periods
  metric_name         = var.metric_name
  namespace           = var.metric_namespace
  period              = var.applying_period
  statistic           = var.statistic_level
  threshold           = var.metric_threshold

  dimensions = {
    InstanceId = sort(aws_instance.default[*].id)[count.index]
  }

  alarm_actions = [
    local.action
  ]
}