Ты бы не стал. Вместо этого вы должны передать темы aws_sfn_activity и sns arn.
variable "sfn_arn" { }
variable "sns_topic_arn" { }
resource "aws_cloudwatch_metric_alarm" "checkQueueLength" {
alarm_name = "MonitorQueueLength"
comparison_operator = "GreaterThanThreshold"
evaluation_periods = "1"
metric_name = "ExecutionsStarted"
namespace = "AWS/States"
period = "2"
statistic = "Sum"
threshold = "1"
dimensions {
StateMachineArn = "${var.sfn_arn}"
alarm_description = "checkStatesQueueLength"
actions_enabled = "true"
}
alarm_actions = ["${var.sns_topic_arn}"]
}