gistfile1.txt

metric {
  provider = "cloudwatch"
  max = 10
  query = <<EOS
[
    {
        "Id": "e1",
        "Expression": "m1",
        "Label": "ErrorCount"
    },
    {
        "Id": "m1",
        "MetricStat": {
            "Metric": {
                "MetricName": "HTTPCode_Target_5XX_Count",
                "Dimensions": [
                    {
                        "Name": "TargetGroup",
                        "Value": "${.TargetGroupARN}"
                    },
                    {
                        "Name": "LoadBalancer",
                        "Value": "${.LoadBalancerARN}"
                    }
                ]
            },
            "Period": 300,
            "Stat": "Sum",
            "Unit": "Count"
        },
        "ReturnData": false
    }
]
EOS
}