Fragmentos de plantillas de Amazon DynamoDB
Application Auto Scaling con una tabla de Amazon DynamoDB
En este ejemplo se configura Application Auto Scaling para un recurso de AWS::DynamoDB::Table. La plantilla define una política de escalado de TargetTrackingScaling que escala el desempeño de WriteCapacityUnits para la tabla.
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
Véase también
Para obtener más información, consulte How to use AWS CloudFormation to configure auto scaling for DynamoDB tables and indexes
Para obtener más información sobre recursos de DynamoDB, consulte AWS::DynamoDB::Table.
