用 AWS CloudFormation 于 Auto Scaling 策略 - 亚马逊 ElastiCache

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用 AWS CloudFormation 于 Auto Scaling 策略

此片段展示了如何使用AWS:::: ElastiCache ReplicationGroup 资源创建目标跟踪策略并将其应用于AWS::ApplicationAutoScaling: ScalableTarget 资源。此示例利用 Fn::Join 和 Ref 内置函数，使用在同一模板中指定的 AWS::ElastiCache::ReplicationGroup 资源的逻辑名称来构建 ResourceId 属性。

ScalingTarget:
   Type: 'AWS::ApplicationAutoScaling::ScalableTarget'
   Properties:
     MaxCapacity: 3
     MinCapacity: 1
     ResourceId: !Sub replication-group/${logicalName}
     ScalableDimension: 'elasticache:replication-group:NodeGroups'
     ServiceNamespace: elasticache
     RoleARN: !Sub "arn:aws:iam::${AWS::AccountId}:role/aws-service-role/elasticache.application-autoscaling.amazonaws.com/AWSServiceRoleForApplicationAutoScaling_ElastiCacheRG"

  ScalingPolicy:
    Type: "AWS::ApplicationAutoScaling::ScalingPolicy"
    Properties:
      ScalingTargetId: !Ref ScalingTarget
      ServiceNamespace: elasticache
      PolicyName: testpolicy
      PolicyType: TargetTrackingScaling
      ScalableDimension: 'elasticache:replication-group:NodeGroups'
      TargetTrackingScalingPolicyConfiguration:
        PredefinedMetricSpecification:
          PredefinedMetricType: ElastiCachePrimaryEngineCPUUtilization
        TargetValue: 40