Auto Scaling：ModifyScalingRule

Action

String

Yes

ModifyScalingRule

The operation that you want to perform. Set the value to ModifyScalingRule.

ScalingRuleId

String

Yes

asr-bp1dvirgwkoowxk7****

The ID of the scaling rule that you want to modify.

ScalingRuleName

String

No

scalingrule****

The name of the scaling rule. The name must be 2 to 64 characters in length, and can contain letters, digits, underscores (_), hyphens (-), and periods (.). The name must start with a letter or a digit.

Cooldown

Integer

No

60

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.

MinAdjustmentMagnitude

Integer

No

1

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

AdjustmentType

String

No

QuantityChangeInCapacity

The adjustment method of the scaling rule. If you set ScalingRuleType to SimpleScalingRule or StepScalingRule, you must specify this parameter. 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.

AdjustmentValue

Integer

No

100

The number of instances that must be scaled based on the scaling rule. If you set ScalingRuleType to SimpleScalingRule or StepScalingRule, you must specify this parameter. Regardless of the scenario, the maximum number of ECS instances that can be added or removed in a single scaling operation is 1000. The value range of this parameter varies based on the value of AdjustmentType.

• Valid values if you set AdjustmentType to QuantityChangeInCapacity: -1000 to 1000.

• Valid values if you set AdjustmentType to PercentChangeInCapacity: -100 to 10000.

• Valid values if you set AdjustmentType to TotalCapacity: 0 to 2000.

EstimatedInstanceWarmup

Integer

No

60

The warmup period of instances to scale. You can specify this parameter only for simple scaling rules and step scaling rules. Auto Scaling adds ECS instances that are in the Warmup state to a scaling group but does not report monitoring data of the ECS instances to CloudMonitor during the warmup period.

Valid values: 0 to 86400. Unit: seconds.

MetricName

String

No

CpuUtilization

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

Valid values if you set ScalingRuleType to TargetTrackingScalingRule:

• CpuUtilization: the average CPU utilization.

• IntranetTx: the average outbound traffic over an internal network.

• IntranetRx: the average inbound traffic over an internal network.

• VpcInternetTx: the average outbound traffic from a virtual private cloud (VPC) to the Internet.

• VpcInternetRx: the average inbound traffic from the Internet to a VPC.

• MemoryUtilization: the memory usage.

• LoadBalancerRealServerAverageQps: the queries per second (QPS) per Application Load Balancer (ALB) server group.

Valid values if you set ScalingRuleType to PredictiveScalingRule:

• CpuUtilization: the average CPU utilization.

• IntranetRx: the average inbound traffic over an internal network.

• IntranetTx: the average outbound traffic over an internal network.

TargetValue

Float

No

0.125

The target value. This parameter is available only if you set ScalingRuleType to TargetTrackingScalingRule or PredictiveScalingRule. The value must be greater than 0 and can have a maximum of three decimal places.

DisableScaleIn

Boolean

No

true

Specifies whether to disable scale-in. This parameter is available if you set ScalingRuleType to TargetTrackingScalingRule.

ScaleInEvaluationCount

Integer

No

15

The number of consecutive times that the event-triggered task for scale-in purposes 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.

ScaleOutEvaluationCount

Integer

No

3

The number of consecutive times that the event-triggered task created for scale-out purposes 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.

PredictiveScalingMode

String

No

PredictAndScale

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.

PredictiveValueBehavior

String

No

MaxOverridePredictiveValue

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.

PredictiveValueBuffer

Integer

No

50

The ratio based on which the predicted value is increased when you set PredictiveValueBehavior to PredictiveValueOverrideMaxWithBuffer. If the predicted value 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.

PredictiveTaskBufferTime

Integer

No

30

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

InitialMaxSize

Integer

No

100

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

StepAdjustment.N.MetricIntervalUpperBound

Float

No

5.0

The upper limit of a step adjustment. This parameter takes effect only if you set ScalingRuleType to StepScalingRule. Valid values: -9.999999E18 to 9.999999E18.

StepAdjustment.N.ScalingAdjustment

Integer

No

1

The number of ECS instances that you want to scale in each step adjustment. This parameter is available only if you set ScalingRuleType to StepScalingRule.

StepAdjustment.N.MetricIntervalLowerBound

Float

No

1.0

The lower limit in a step adjustment. This parameter is available only if you set ScalingRuleType to StepScalingRule. Valid values: -9.999999E18 to 9.999999E18.

AlarmDimension.N.DimensionKey

String

No

rulePool

The dimension key of the metric.

AlarmDimension.N.DimensionValue

String

No

sgp-l1cbirz451yxu2****

The dimension value of the metric.

RequestId

String

473469C7-AA6F-4DC5-B3DB-A3DC0DE3****

The request ID.