Frammenti di modello Amazon DynamoDB - AWS CloudFormation

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Frammenti di modello Amazon DynamoDB

Application Auto Scaling con una tabella Amazon DynamoDB

In questo esempio Application Auto Scaling viene configurato per una risorsa AWS::DynamoDB::Table. Il modello definisce una policy di dimensionamento TargetTrackingScaling che aumenta il throughput WriteCapacityUnits della tabella.

JSON

{ "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, "ScaleInCooldown": 60, "ScaleOutCooldown": 60, "PredefinedMetricSpecification": { "PredefinedMetricType": "DynamoDBWriteCapacityUtilization" } } } } } }

YAML

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

Consulta anche

Per ulteriori informazioni, consulta il post del blog How to use AWS CloudFormation to configure auto scaling for DynamoDB table and index on the Database Blog. AWS

Per ulteriori informazioni sulle risorse DynamoDB, AWSvedere: :DynamoDB: :Table.