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CloudWatch alarm on a critical metric treats missing data as missing

AWS_OPS_012 MEDIUM Observability

What it checks

CloudWatch alarm on a critical metric treats missing data as missing

Where it applies

Terraform: aws_cloudwatch_metric_alarm

CloudFormation: AWS::CloudWatch::Alarm

How to fix it

  1. Review metric publication and active actions. Keep missing for EC2 lifecycle actions; otherwise select missing, ignore, breaching or notBreaching according to the objective and route appropriate notifications.

Frameworks

These mappings are advisory, not an attestation of compliance.

Vendor documentation

All rules