Who watches the watchers?

resource "aws_cloudwatch_metric_alarm" "invocations" {

  count                     = length(local.function_names)

  alarm_actions             = [local.topic_arn]

  actions_enabled           = true

  alarm_name                = "Invocations alarm for ${local.function_names[count.index]}."

  comparison_operator       = "LessThanThreshold"

  evaluation_periods        = "1"

  insufficient_data_actions = [local.topic_arn]

  metric_name               = "Invocations"

  namespace                 = "AWS/Lambda"

  ok_actions                = [local.topic_arn]

  period                    = (var.rate + 1) * 60

  statistic                 = "Sum"

  tags                      = local.common_tags

  threshold                 = 1

  dimensions = {

    FunctionName = local.function_names[count.index]

  }

}

resource "aws_cloudwatch_metric_alarm" "errors" {

  count                     = length(local.function_names)

  alarm_actions             = [local.topic_arn]

  actions_enabled           = true

  alarm_name                = "Errors alarm for ${local.function_names[count.index]}."

  comparison_operator       = "GreaterThanThreshold"

  evaluation_periods        = "1"

  insufficient_data_actions = [local.topic_arn]

  metric_name               = "Errors"

  namespace                 = "AWS/Lambda"

  ok_actions                = [local.topic_arn]

  period                    = (var.rate + 1) * 60

  statistic                 = "Sum"

  tags                      = local.common_tags

  threshold                 = 0

  dimensions = {

    FunctionName = local.function_names[count.index]

  }

}