使用Cloudformation进行DynamoDB自动扩展

Question

AWS发布了DynamoDB的自动扩展功能.我想知道如何通过Cloudformation自动缩放创建表.

Answer 1

以下是DynamoDB表的ClodFormation自动扩展策略.希望它能让您了解如何构建策略脚本.

{
  "Type" : "AWS::ApplicationAutoScaling::ScalingPolicy",
  "Properties" : {
    "PolicyName" : "MyScalingPolicy",
    "PolicyType" : "TargetTrackingScaling",
    "ResourceId" : "arn:aws:dynamodb:us-east-1:123456789012:table/books_table",
    "ScalableDimension" : "dynamodb:table:WriteCapacityUnits",
    "ServiceNamespace" : "dynamodb",
    "TargetTrackingScalingPolicyConfiguration" : {
    "PredefinedMetricSpecification": {
            "PredefinedMetricType": "DynamoDBWriteCapacityUtilization"
        },
        "ScaleOutCooldown": 60,
        "ScaleInCooldown": 60,
        "TargetValue": 50.0
    }    
  }
}

参考文献: -

CloudFormaction自动扩展策略

用于自动扩展的AWS CLI命令

AWS CLI命令: -

aws application-autoscaling put-scaling-policy \
    --service-namespace dynamodb \
    --resource-id "table/TestTable" \
    --scalable-dimension "dynamodb:table:WriteCapacityUnits" \
    --policy-name "MyScalingPolicy" \
    --policy-type "TargetTrackingScaling" \
    --target-tracking-scaling-policy-configuration file://scaling-policy.json

扩大规模policy.json: -

{
    "PredefinedMetricSpecification": {
        "PredefinedMetricType": "DynamoDBWriteCapacityUtilization"
    },
    "ScaleOutCooldown": 60,
    "ScaleInCooldown": 60,
    "TargetValue": 50.0
}