ModifyInstanceAttribute - Auto Scaling - Alibaba Cloud Documentation Center

Modifies partial information of an ECS instance in a scaling group by calling the ModifyInstanceAttribute API. Currently, only the lifecycle management property of instances manually added to a scaling group can be modified, allowing Auto Scaling to manage ECS instances in the scaling group more flexibly.

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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:ModifyInstanceAttribute

update

*ScalingGroup

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

None

Request parameters

Parameter	Type	Required	Description	Example
ScalingGroupId	string	Yes	The ID of the ECS instance in the scaling group.	asg-bp18p2yfxow2dloq****
InstanceId	string	No	The ID of the scaling group.	i-bp109k5j3dum1ce6****
Entrusted	boolean	Yes	Specifies whether to entrust the lifecycle of a manually added ECS instance to the scaling group. Valid values: true: Entrusted. The lifecycle of the instance is managed by Auto Scaling, the same as instances of automatic creation in the scaling group. The instance is subject to automatic release when removed from the scaling group (excluding instances removed by invoking the DetachInstances operation). false: Not entrusted. The instance is not released when removed from the scaling group. Note This parameter is supported only for instances manually added to the scaling group, not for instances created within the scaling group.	true
RegionId	string	Yes	The region ID of the scaling group.	cn-hangzhou
InstanceIds	array	No
	string	No	The instance ID.	i-bp109k5j3dum1ce6****

Response elements

Element	Type	Description	Example
	object
RequestId	string	The request ID.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3****

Examples

Success response

JSON format

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3****"
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.