CloudWatch alarm actions should be enabled

How to fix it

• Affects another check: An alarm with no action for the ALARM state passes here once actions are on and still does nothing when it fires; CloudWatch.15 fails it until one is added.
• Interrupts service: An Auto Scaling action on an alarm already in ALARM is invoked once a minute while it stays there, so it can scale as soon as actions are on.

In the console

CloudWatch → Alarms → the alarm → Actions

Enable actions

On, once you know what each of the alarm's actions does

With the AWS CLI

aws cloudwatch enable-alarm-actions --alarm-names <alarm-name> --region <region>

With Terraform

resource "aws_cloudwatch_metric_alarm" "this" {
  alarm_name          = var.alarm_name
  comparison_operator = var.comparison_operator
  evaluation_periods  = var.evaluation_periods
  metric_name         = var.metric_name
  actions_enabled     = true
}