{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Metadata": {
        "License": "MIT No Attribution"
    },
    "Description": "AWS CloudFormation Sample Template to demonstrate DynamoDB auto scaling. **WARNING** This template creates an Amazon DynamoDB table. You will be billed for the AWS resources used if you create a stack from this template.",
    "Parameters": {
        "userTableName": {
            "Type": "String",
            "Default": "myapp.User",
            "Description": "Name of the user table"
        },
        "userIndexName": {
            "Type": "String",
            "Default": "user-city-index",
            "Description": "Name of the user index"
        }
    },
    "Resources": {
        "tableMyAppUser": {
            "Type": "AWS::DynamoDB::Table",
            "Properties": {
                "TableName": { "Ref": "userTableName" },
                "AttributeDefinitions": [{
                        "AttributeName": "userId",
                        "AttributeType": "S"
                    },
                    {
                        "AttributeName": "city",
                        "AttributeType": "S"
                    },
                    {
                        "AttributeName": "signupDate",
                        "AttributeType": "S"
                    }
                ],

                "KeySchema": [{
                    "AttributeName": "userId",
                    "KeyType": "HASH"
                }],
                "ProvisionedThroughput": {
                    "ReadCapacityUnits": "5",
                    "WriteCapacityUnits": "5"
                },

                "GlobalSecondaryIndexes": [{
                    "IndexName": { "Ref": "userIndexName" },
                    "KeySchema": [{
                        "AttributeName": "city",
                        "KeyType": "HASH"
                    }, {
                        "AttributeName": "signupDate",
                        "KeyType": "RANGE"
                    }],
                    "Projection": {
                        "ProjectionType": "ALL"
                    },
                    "ProvisionedThroughput": {
                        "ReadCapacityUnits": "5",
                        "WriteCapacityUnits": "5"
                    }
                }]
            }
        },
        "UserTableWriteCapacityScalableTarget": {
            "Type": "AWS::ApplicationAutoScaling::ScalableTarget",
            "Properties": {
                "MaxCapacity": 100,
                "MinCapacity": 5,
                "ResourceId": {
                    "Fn::Join": [
                        "/", [
                            "table",
                            { "Ref": "tableMyAppUser" }
                        ]
                    ]
                },
                "RoleARN": {
                    "Fn::Sub": "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/dynamodb.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_DynamoDBTable"
                },
                "ScalableDimension": "dynamodb:table:WriteCapacityUnits",
                "ServiceNamespace": "dynamodb"
            }, 
            "DependsOn": "tableMyAppUser"
        },
        "UserTableWriteScalingPolicy": {
            "Type": "AWS::ApplicationAutoScaling::ScalingPolicy",
            "Properties": {
                "PolicyName": "WriteAutoScalingPolicy",
                "PolicyType": "TargetTrackingScaling",
                "ScalingTargetId": {
                    "Ref": "UserTableWriteCapacityScalableTarget"
                },
                "TargetTrackingScalingPolicyConfiguration": {
                    "TargetValue": 70.0,
                    "ScaleInCooldown": 60,
                    "ScaleOutCooldown": 60,
                    "PredefinedMetricSpecification": {
                        "PredefinedMetricType": "DynamoDBWriteCapacityUtilization"
                    }
                }
            }
        },
        "UserIndexWriteCapacityScalableTarget": {
            "Type": "AWS::ApplicationAutoScaling::ScalableTarget",
            "Properties": {
                "MaxCapacity": 100,
                "MinCapacity": 5,
                "ResourceId": {
                    "Fn::Join": [
                        "/", [
                            "table",
                            { "Ref": "tableMyAppUser" },
                            "index",
                            { "Ref": "userIndexName" }
                        ]
                    ]
                },
                "RoleARN": {
                    "Fn::Sub": "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/dynamodb.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_DynamoDBTable"
                },
                "ScalableDimension": "dynamodb:index:WriteCapacityUnits",
                "ServiceNamespace": "dynamodb"
            }, 
            "DependsOn": "tableMyAppUser"
        },
        "UserIndexWriteScalingPolicy": {
            "Type": "AWS::ApplicationAutoScaling::ScalingPolicy",
            "Properties": {
                "PolicyName": "WriteAutoScalingPolicy",
                "PolicyType": "TargetTrackingScaling",
                "ScalingTargetId": {
                    "Ref": "UserIndexWriteCapacityScalableTarget"
                },
                "TargetTrackingScalingPolicyConfiguration": {
                    "TargetValue": 70.0,
                    "ScaleInCooldown": 60,
                    "ScaleOutCooldown": 60,
                    "PredefinedMetricSpecification": {
                        "PredefinedMetricType": "DynamoDBWriteCapacityUtilization"
                    }
                }
            }
        },

        "UserTableReadCapacityScalableTarget": {
            "Type": "AWS::ApplicationAutoScaling::ScalableTarget",
            "Properties": {
                "MaxCapacity": 100,
                "MinCapacity": 5,
                "ResourceId": {
                    "Fn::Join": [
                        "/", [
                            "table",
                            { "Ref": "tableMyAppUser" }
                        ]
                    ]
                },
                "RoleARN": {
                    "Fn::Sub": "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/dynamodb.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_DynamoDBTable"
                },
                "ScalableDimension": "dynamodb:table:ReadCapacityUnits",
                "ServiceNamespace": "dynamodb"
            }, 
            "DependsOn": "tableMyAppUser"
        },
        "UserTableReadScalingPolicy": {
            "Type": "AWS::ApplicationAutoScaling::ScalingPolicy",
            "Properties": {
                "PolicyName": "ReadAutoScalingPolicy",
                "PolicyType": "TargetTrackingScaling",
                "ScalingTargetId": {
                    "Ref": "UserTableReadCapacityScalableTarget"
                },
                "TargetTrackingScalingPolicyConfiguration": {
                    "TargetValue": 70.0,
                    "ScaleInCooldown": 60,
                    "ScaleOutCooldown": 60,
                    "PredefinedMetricSpecification": {
                        "PredefinedMetricType": "DynamoDBReadCapacityUtilization"
                    }
                }
            }
        },
        "UserIndexReadCapacityScalableTarget": {
            "Type": "AWS::ApplicationAutoScaling::ScalableTarget",
            "Properties": {
                "MaxCapacity": 100,
                "MinCapacity": 5,
                "ResourceId": {
                    "Fn::Join": [
                        "/", [
                            "table",
                            { "Ref": "tableMyAppUser" },
                            "index",
                            { "Ref": "userIndexName" }
                        ]
                    ]
                },
                "RoleARN": {
                    "Fn::Sub": "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/dynamodb.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_DynamoDBTable"
                },
                "ScalableDimension": "dynamodb:index:ReadCapacityUnits",
                "ServiceNamespace": "dynamodb"
            }, 
            "DependsOn": "tableMyAppUser"
        },
        "UserIndexReadScalingPolicy": {
            "Type": "AWS::ApplicationAutoScaling::ScalingPolicy",
            "Properties": {
                "PolicyName": "ReadAutoScalingPolicy",
                "PolicyType": "TargetTrackingScaling",
                "ScalingTargetId": {
                    "Ref": "UserIndexReadCapacityScalableTarget"
                },
                "TargetTrackingScalingPolicyConfiguration": {
                    "TargetValue": 70.0,
                    "ScaleInCooldown": 60,
                    "ScaleOutCooldown": 60,
                    "PredefinedMetricSpecification": {
                        "PredefinedMetricType": "DynamoDBReadCapacityUtilization"
                    }
                }
            }
        }
    }
}