CloudWatch Alarm
An Amazon CloudWatch Alarm watches a single CloudWatch metric (or a maths expression based on one or more metrics) and performs one or more actions when the metric breaches a threshold for a specified number of evaluation periods. Typical actions include sending an SNS notification, invoking an Auto Scaling policy or stopping, terminating, rebooting or recovering an EC2 instance. Alarms are therefore often a critical part of operational resilience and cost-control strategies, and mis-configuration can lead to missed incidents or unwanted automated actions.
Official documentation: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html
Terraform Mappings:
aws_cloudwatch_metric_alarm.alarm_name
Supported Methods​
GET: Get an alarm by nameLIST: List all alarmsSEARCH: Search for alarms. This accepts JSON in the format ofcloudwatch.DescribeAlarmsForMetricInput