CloudWatch alarm message example

example.json

{
  "AlarmName": "cpuUtilTest",
  "AlarmDescription": "testing alarms for cpu utilization",
  "AWSAccountId": "08931xxxxxx",
  "NewStateValue": "ALARM",
  "OldStateValue": "OK",
  "NewStateReason": "Threshold Crossed: 1 datapoint (5.199) was greater than or equal to the threshold (5.0).",
  "StateChangeTime": "2012-08-05T22:31:25.524+0000",
  "Region": "US - N. Virginia",
  "Trigger": {
    "MetricName": "CPUUtilization",
    "Namespace": "AWS/EC2",
    "Statistic": "AVERAGE",
    "Unit": null,
    "Dimensions": [
      {
        "name": "InstanceId",
        "value": "i-39e64c5f"
      }
    ],
    "Period": 900,
    "EvaluationPeriods": 1,
    "ComparisonOperator": "GreaterThanOrEqualToThreshold",
    "Threshold": 5.0
  }
}