AWS CloudFormation
User Guide (API Version 2010-05-15)
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Amazon DynamoDB 模板代码段

带 Amazon DynamoDB 表的 Application Auto Scaling

此示例为 AWS::DynamoDB::Table 资源设置 Application Auto Scaling。此模板定义扩展表的 WriteCapacityUnits 吞吐量的 TargetTrackingScaling 扩展策略。

JSON

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{ "Resources": { "DDBTable": { "Type": "AWS::DynamoDB::Table", "Properties": { "AttributeDefinitions": [ { "AttributeName": "ArtistId", "AttributeType": "S" }, { "AttributeName": "Concert", "AttributeType": "S" }, { "AttributeName": "TicketSales", "AttributeType": "S" } ], "KeySchema": [ { "AttributeName": "ArtistId", "KeyType": "HASH" }, { "AttributeName": "Concert", "KeyType": "RANGE" } ], "GlobalSecondaryIndexes": [ { "IndexName": "GSI", "KeySchema": [ { "AttributeName": "TicketSales", "KeyType": "HASH" } ], "Projection": { "ProjectionType": "KEYS_ONLY" }, "ProvisionedThroughput": { "ReadCapacityUnits": 5, "WriteCapacityUnits": 5 } } ], "ProvisionedThroughput": { "ReadCapacityUnits": 5, "WriteCapacityUnits": 5 } } }, "WriteCapacityScalableTarget": { "Type": "AWS::ApplicationAutoScaling::ScalableTarget", "Properties": { "MaxCapacity": 15, "MinCapacity": 5, "ResourceId": { "Fn::Join": [ "/", [ "table", { "Ref": "DDBTable" } ] ] }, "RoleARN": { "Fn::GetAtt": ["ScalingRole", "Arn"] }, "ScalableDimension": "dynamodb:table:WriteCapacityUnits", "ServiceNamespace": "dynamodb" } }, "ScalingRole": { "Type": "AWS::IAM::Role", "Properties": { "AssumeRolePolicyDocument": { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "Service": [ "application-autoscaling.amazonaws.com" ] }, "Action": [ "sts:AssumeRole" ] } ] }, "Path": "/", "Policies": [ { "PolicyName": "root", "PolicyDocument": { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "dynamodb:DescribeTable", "dynamodb:UpdateTable", "cloudwatch:PutMetricAlarm", "cloudwatch:DescribeAlarms", "cloudwatch:GetMetricStatistics", "cloudwatch:SetAlarmState", "cloudwatch:DeleteAlarms" ], "Resource": "*" } ] } } ] } }, "WriteScalingPolicy": { "Type": "AWS::ApplicationAutoScaling::ScalingPolicy", "Properties": { "PolicyName": "WriteAutoScalingPolicy", "PolicyType": "TargetTrackingScaling", "ScalingTargetId": { "Ref": "WriteCapacityScalableTarget" }, "TargetTrackingScalingPolicyConfiguration": { "TargetValue": 50.0, "ScaleInCooldown": 60, "ScaleOutCooldown": 60, "PredefinedMetricSpecification": { "PredefinedMetricType": "DynamoDBWriteCapacityUtilization" } } } } } }

YAML

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Resources: DDBTable: Type: "AWS::DynamoDB::Table" Properties: AttributeDefinitions: - AttributeName: "ArtistId" AttributeType: "S" - AttributeName: "Concert" AttributeType: "S" - AttributeName: "TicketSales" AttributeType: "S" KeySchema: - AttributeName: "ArtistId" KeyType: "HASH" - AttributeName: "Concert" KeyType: "RANGE" GlobalSecondaryIndexes: - IndexName: "GSI" KeySchema: - AttributeName: "TicketSales" KeyType: "HASH" Projection: ProjectionType: "KEYS_ONLY" ProvisionedThroughput: ReadCapacityUnits: 5 WriteCapacityUnits: 5 ProvisionedThroughput: ReadCapacityUnits: 5 WriteCapacityUnits: 5 WriteCapacityScalableTarget: Type: "AWS::ApplicationAutoScaling::ScalableTarget" Properties: MaxCapacity: 15 MinCapacity: 5 ResourceId: !Join - / - - table - !Ref DDBTable RoleARN: !GetAtt ScalingRole.Arn ScalableDimension: dynamodb:table:WriteCapacityUnits ServiceNamespace: dynamodb ScalingRole: Type: "AWS::IAM::Role" Properties: AssumeRolePolicyDocument: Version: "2012-10-17" Statement: - Effect: "Allow" Principal: Service: - application-autoscaling.amazonaws.com Action: - "sts:AssumeRole" Path: "/" Policies: - PolicyName: "root" PolicyDocument: Version: "2012-10-17" Statement: - Effect: "Allow" Action: - "dynamodb:DescribeTable" - "dynamodb:UpdateTable" - "cloudwatch:PutMetricAlarm" - "cloudwatch:DescribeAlarms" - "cloudwatch:GetMetricStatistics" - "cloudwatch:SetAlarmState" - "cloudwatch:DeleteAlarms" Resource: "*" WriteScalingPolicy: Type: "AWS::ApplicationAutoScaling::ScalingPolicy" Properties: PolicyName: WriteAutoScalingPolicy PolicyType: TargetTrackingScaling ScalingTargetId: !Ref WriteCapacityScalableTarget TargetTrackingScalingPolicyConfiguration: TargetValue: 50.0 ScaleInCooldown: 60 ScaleOutCooldown: 60 PredefinedMetricSpecification: PredefinedMetricType: DynamoDBWriteCapacityUtilization

另请参阅

有关 DynamoDB 资源的更多信息,请参阅 AWS::DynamoDB::Table