Auto Scaling:DescribeScalingRules

The predefined metric of the scaling rule. If you set ScalingRuleType to TargetTrackingScalingRule or PredictiveScalingRule, you must specify this parameter.

Valid values if ScalingRuleType is set to TargetTrackingScalingRule:

• CpuUtilization: the average CPU utilization
• ClassicInternetRx: the average inbound Internet traffic over the classic network
• ClassicInternetTx: the average outbound Internet traffic over the classic network
• VpcInternetRx: the average inbound Internet traffic over a virtual private cloud (VPC)
• VpcInternetTx: the average outbound Internet traffic over a VPC
• IntranetRx: the average inbound traffic over the internal network

• IntranetTx: the average outbound traffic over the internal network

  Valid values if ScalingRuleType is set to PredictiveScalingRule:

• CpuUtilization: the average CPU utilization
• IntranetRx: the average inbound traffic over the internal network
• IntranetTx: the average outbound traffic over the internal network

The adjustment method of the scaling rule. Valid values:

• QuantityChangeInCapacity: adds the specified number of ECS instances to or removes the specified number of ECS instances from the scaling group.
• PercentChangeInCapacity: adds the specified percentage of ECS instances to or removes the specified percentage of ECS instances from the scaling group.
• TotalCapacity: adjusts the number of ECS instances in the scaling group to a specified number.

The maximum number of ECS instances that can be added to the scaling group. If you specify InitialMaxSize, you must also specify PredictiveValueBehavior.

The warmup period of an ECS instance.

The number of consecutive times that the event-triggered task created for scale-outs must meet the threshold conditions before an alert is triggered. After a target tracking scaling rule is created, an event-triggered task is automatically created and associated with the target tracking scaling rule.

The mode of the predictive scaling rule. Valid values:

• PredictAndScale: provides predictions and creates prediction tasks.
• PredictOnly: provides predictions but does not create prediction tasks.

The minimum number of instances that must be scaled. This parameter takes effect only if you set ScalingRuleType to SimpleScalingRule or StepScalingRule, and AdjustmentType to PercentChangeInCapacity.

The unique identifier of the scaling rule.

The amount of buffer time before the prediction task runs. By default, all prediction tasks that are automatically created by a predictive scaling rule run on the hour. You can specify a buffer time to run prediction tasks and prepare resources in advance. Valid values: 0 to 60. Unit: minutes.

The minimum number of ECS instances that the scaling group must contain.

The ID of the scaling group whose scaling rules are queried.

The action on the predicted maximum value. Valid values:

• MaxOverridePredictiveValue: uses the initial maximum capacity as the maximum value for prediction tasks if the predicted value is greater than the initial maximum capacity.
• PredictiveValueOverrideMax: uses the predicted value as the maximum value for prediction tasks if the predicted value is greater than the initial maximum capacity.
• PredictiveValueOverrideMaxWithBuffer: increases the predicted value by a ratio that is specified by PredictiveValueBuffer, and uses the increased value as the maximum value for prediction tasks if the predicted value increased by the ratio is greater than the initial maximum capacity.

The target value.

The cooldown period of the scaling rule. This parameter is available only if you set ScalingRuleType to SimpleScalingRule. Valid values: 0 to 86400. Unit: seconds.

The maximum number of ECS instances that the scaling group can contain.

The ratio based on which the predicted value is increased if you set PredictiveValueBehavior to PredictiveValueOverrideMaxWithBuffer. If the predicted value that is increased by this ratio is greater than the initial maximum capacity, the increased value is used as the maximum value for prediction tasks. Valid values: 0 to 100.

The type of the scaling rule. Valid values:

• SimpleScalingRule: adjusts the number of ECS instances based on the values of AdjustmentType and AdjustmentValue.
• TargetTrackingScalingRule: calculates the number of ECS instances that must be scaled and maintains the value of a predefined metric close to the value of TargetValue.
• StepScalingRule: scales ECS instances in steps based on the specified thresholds and metric values.
• PredictiveScalingRule: uses machine learning to analyze historical monitoring data of the scaling group and predicts the future values of metrics. In addition, Auto Scaling creates scheduled tasks to adjust the minimum and maximum numbers of instances for the scaling group.

The number of instances that need to be scaled based on the scaling rule.

The number of consecutive times that the event-triggered task created for scale-ins must meet the threshold conditions before an alert is triggered. After a target tracking scaling rule is created, an event-triggered task is automatically created and associated with the target tracking scaling rule.

Indicates whether to disable scale-in. This parameter takes effect only if you set ScalingRuleType to TargetTrackingScalingRule. Valid values:

• true
• false

The name of the scaling rule.

The ID of the scaling rule.