{
  "AWSTemplateFormatVersion" : "2010-09-09",
 
  "Description" : "AWS CloudFormation Sample Template SQS_With_CloudWatch_Alarms: Sample template showing how to create an SQS queue with AWS CloudWatch alarms on queue depth. **WARNING** This template creates an Amazon SQS Queue and one or more Amazon CloudWatch alarms. You will be billed for the AWS resources used if you create a stack from this template.",
 
  "Parameters" : {
    "AlarmEMail": {
      "Description": "EMail address to notify if there are any operational issues",
      "Type": "String",
      "AllowedPattern": "([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)",
      "ConstraintDescription": "must be a valid email address."
    }
  },
 
  "Resources" : {
    "MyQueue" : {
      "Type" : "AWS::SQS::Queue",
      "Properties" : {
      }
    },

    "AlarmTopic": {
      "Type": "AWS::SNS::Topic",
      "Properties": {
        "Subscription": [{
          "Endpoint": { "Ref": "AlarmEMail" },
          "Protocol": "email"
        }]
      }
    },

    "QueueDepthAlarm": {
      "Type": "AWS::CloudWatch::Alarm",
      "Properties": {
        "AlarmDescription": "Alarm if queue depth grows beyond 10 messages",
        "Namespace": "AWS/SQS",
        "MetricName": "ApproximateNumberOfMessagesVisible",
        "Dimensions": [{
          "Name": "QueueName",
          "Value" : { "Fn::GetAtt" : ["MyQueue", "QueueName"] }
        }],
        "Statistic": "Sum",
        "Period": "300",
        "EvaluationPeriods": "1",
        "Threshold": "10",
        "ComparisonOperator": "GreaterThanThreshold",
        "AlarmActions": [{ "Ref": "AlarmTopic" }],
        "InsufficientDataActions": [{ "Ref": "AlarmTopic" }]
      }
    }
  },
  "Outputs" : {
    "QueueURL" : {
      "Description" : "URL of newly created SQS Queue",
      "Value" : { "Ref" : "MyQueue" }
    },
    "QueueARN" : {
      "Description" : "ARN of newly created SQS Queue",
      "Value" : { "Fn::GetAtt" : ["MyQueue", "Arn"]}
    },
    "QueueName" : {
      "Description" : "Name newly created SQS Queue",
      "Value" : { "Fn::GetAtt" : ["MyQueue", "QueueName"]}
    }
  }
}