alarm-template.json

{
  "AWSTemplateFormatVersion" : "2010-09-09",

  "Description" : "Cloudwatch Alarm Creation Stack",
  "Parameters" : {
    "ServiceName" : {
      "Description" : "Name of the service to attach alarms to",
      "Type" : "String",
      "Default" : ""
    },
    "AlarmCpuUtilization" : {
      "Description" : "Threshold for CPU",
      "Type" : "String",
      "Default" : "80"
    },
    "AlarmMemoryUtilization" : {
      "Description" : "Threshold for Memory",
      "Type" : "String",
      "Default" : "80"
    },
    "SNSSubscription" : {
      "Description" : "The SNS Topic to subscribe to",
      "Type" : "String",
      "Default" : "Dev",
      "AllowedValues" : [ "General", "Dev", "Prod", "Stage" ]
    },
    "ECSClusterName" : {
      "Description" : "Name of the service's cluster",
      "Type" : "String",
      "Default" : ""
    }
  },
  "Mappings" : {
    "SNSMap" : {
      "General" : {
        "endpoint" : "general-alerts@company.com"
      },
      "Dev" : {
        "endpoint" : "dev-alerts@company.com"
      },
      "Prod" : {
        "endpoint" : "prod-alerts@company.com"
      },
      "Stage" : {
        "endpoint" : "stage-alerts@company.com"
      }
    }
  },
  "Resources" : {

    "SNSTopic" : {
    "Type" : "AWS::SNS::Topic",
      "Properties" : {
        "TopicName" : { "Fn::Join" : ["-", ["ECS", "Monitoring", { "Ref" : "ServiceName"}]]} ,
        "Subscription" : [ {
          "Endpoint" : { "Fn::FindInMap" : [ "SNSMap", { "Ref" : "SNSSubscription" }, "endpoint"]},
          "Protocol" : "email"
         } ]
      }
    },
    "CPUAlarmLoad" : {
    "Type" : "AWS::CloudWatch::Alarm",
      "Properties" : {
        "AlarmDescription" : { "Fn::Join" : [ "", ["Service CPU utilization higher than ", { "Ref" : "AlarmCpuUtilization" } ]] },
        "AlarmName" : { "Fn::Join" : [ " ", ["Service CPU Load", { "Ref" : "ServiceName" } ]] },
        "AlarmActions" : [ { "Ref" : "SNSTopic" } ],
        "ComparisonOperator" : "GreaterThanThreshold",
        "Dimensions" : [ { 
          "Name" : "ClusterName", 
          "Value" : { "Ref" : "ECSClusterName" } 
          },{
            "Name" : "ServiceName",
            "Value" : { "Ref" : "ServiceName" }
          } ],
        "EvaluationPeriods" : "4",
        "MetricName" : "CPUUtilization",
        "Namespace" : "AWS/ECS",
        "Period" : "300",
        "Statistic" : "Average",
        "Threshold" : { "Ref" : "AlarmCpuUtilization" },
        "Unit" : "Percent"
   }
},
    "CPUAlarmResources" : {
    "Type" : "AWS::CloudWatch::Alarm",
      "Properties" : {
        "AlarmDescription" : "Service CPU utilization constantly higher than 200%",
        "AlarmName" : { "Fn::Join" : [ " ", ["Service CPU Resource", { "Ref" : "ServiceName" } ]] },
        "AlarmActions" : [ { "Ref" : "SNSTopic" } ],
        "ComparisonOperator" : "GreaterThanThreshold",
        "Dimensions" : [ { 
          "Name" : "ClusterName", 
          "Value" : { "Ref" : "ECSClusterName" } 
          },{
            "Name" : "ServiceName",
            "Value" : { "Ref" : "ServiceName" }
          } ],
        "EvaluationPeriods" : "5",
        "MetricName" : "CPUUtilization",
        "Namespace" : "AWS/ECS",
        "Period" : "300",
        "Statistic" : "Average",
        "Threshold" : "200",
        "Unit" : "Percent"
   }
},
    "MemoryAlarm" : {
      "Type" : "AWS::CloudWatch::Alarm",
      "Properties" : {
        "AlarmDescription" : { "Fn::Join" : [ "", ["Service Memory utilization higher than ", { "Ref" : "AlarmMemoryUtilization" } ]] },
        "AlarmName" : { "Fn::Join" : [ " ", ["Service Memory Load", { "Ref" : "ServiceName" } ]] },
        "AlarmActions" : [ { "Ref" : "SNSTopic" } ],
        "ComparisonOperator" : "GreaterThanThreshold",
        "Dimensions" : [ { 
          "Name" : "ClusterName", 
          "Value" : { "Ref" : "ECSClusterName" } 
          },{
          "Name" : "ServiceName",
          "Value" : { "Ref" : "ServiceName" }
          } ],
        "EvaluationPeriods" : "3",
        "MetricName" : "MemoryUtilization",
        "Namespace" : "AWS/ECS",
        "Period" : "300",
        "Statistic" : "Average",
        "Threshold" : { "Ref" : "AlarmMemoryUtilization" },
        "Unit" : "Percent"
      }
    }
  }
}