Scale ECS Instances On-Demand via Auto Scaling API - Auto Scaling - Alibaba Cloud - Auto Scaling

Manually executes a simple scaling rule or step scaling rule to adjust the number of Elastic Compute Service (ECS) instances or elastic container instances in a scaling group. Target tracking scaling rules and predictive scaling rules are automatically executed by Auto Scaling.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.
API: The API that you can call to perform the action.
Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.
Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.
- For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.
- For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.
Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.
Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

ess:ExecuteScalingRule

update

*ScalingGroup

acs:ess:{#regionId}:{#accountId}:scalinggroup/{#ScalingGroupId}

None

Request parameters

Parameter	Type	Required	Description	Example
ScalingRuleAri	string	Yes	The unique identifier of the scaling rule. Note This operation supports simple scaling rules and step scaling rules. To execute a step scaling rule, you must specify `BreachThreshold` and `MetricValue`.	ari:acs:ess:cn-hangzhou:140692647406**:scalingrule/asr-bp1dvirgwkoowxk7**
ClientToken	string	No	The client token that ensures the idempotence of the request. You can use the client to generate the token, but the token must be unique across requests. The token can contain only ASCII characters and cannot exceed 64 characters in length. For more information, see Ensure idempotence.	123e4567-e89b-12d3-a456-426655440000
BreachThreshold	number	No	The threshold for executing the step scaling rule. Valid values: -9.999999E18 to 9.999999E18.	1.0
MetricValue	number	No	The metric value for executing the step scaling rule. Valid values: -9.999999E18 to 9.999999E18.	1.0
RegionId	string	No	The region ID of the scaling group.	cn-qingdao

Response elements

Element	Type	Description	Example
	object
ScalingActivityId	string	The ID of the scaling activity.	asa-bp13o672yeautiil****
RequestId	string	The request ID.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E

Examples

Success response

JSON format

{
  "ScalingActivityId": "asa-bp13o672yeautiil****",
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E"
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.