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

resource "aws_cloudwatch_metric_alarm" "tgw-PacketDropCountNoRoute" {
  alarm_name                = "${var.cw-alarm-prefix}:TGW:PacketDropCountNoRoute:${var.tgw-id}"
  comparison_operator       = var.settings.PacketDropCountNoRoute.comparison_operator
  evaluation_periods        = var.settings.PacketDropCountNoRoute.evaluation_periods
  metric_name               = "PacketDropCountNoRoute"
  period                    = var.settings.PacketDropCountNoRoute.period
  statistic                 = var.settings.PacketDropCountNoRoute.statistic
  threshold                 = var.settings.PacketDropCountNoRoute.threshold
  alarm_description         = "TGW:PacketDropCountNoRoute"
  namespace                 = "AWS/TransitGateway"
  insufficient_data_actions = []
  actions_enabled           = var.actions-enabled
  alarm_actions             = [var.settings.PacketDropCountNoRoute.action]
  ok_actions                = [var.settings.PacketDropCountNoRoute.action]
  dimensions = {
    TransitGateway = var.tgw-id
  }
  tags = var.default-tags
  lifecycle {
    ignore_changes = [tags]
  }
}