使用 Cloudformation 进行 DynamoDB 自动扩展

AWS发布自动缩放 https://aws.amazon.com/pt/about-aws/whats-new/2017/06/announcing-amazon-dynamodb-auto-scaling/对于 DynamoDB。我想知道如何通过 Cloudformation 创建具有自动缩放功能的表。

这里是CloudFormation 自动扩展策略对于 DynamoDB 表。希望它能让您了解如何制定策略脚本。

{
  "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：-

CloudFormaction 自动扩展策略 http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-applicationautoscaling-scalingpolicy.html

用于自动扩展的 AWS CLI 命令 http://docs.aws.amazon.com/amazondynamodb/latest/developerguide/AutoScaling.CLI.html#AutoScaling.CLI.CreateScalingPolicy

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

缩放策略.json：-

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