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    Auto Scaling:CompleteLifecycleAction

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    Auto Scaling:CompleteLifecycleAction

    Last Updated:Aug 28, 2026

    Ends the timeout period of a lifecycle hook ahead of schedule so that Auto Scaling can proceed to the next action based on your business requirements.

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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:CompleteLifecycleAction

    update

    *ScalingGroup

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

    		 None None

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    LifecycleHookId

    string

    Yes

    The ID of the lifecycle hook.

    ash-bp14g3ee6bt3sc98****
    LifecycleActionToken

    string

    Yes

    The token of the lifecycle action. You can obtain this token from the Simple Message Queue (SMQ, formerly MNS) queue or topic specified for the lifecycle hook.

    aaaa-bbbbb-cccc-ddddd
    LifecycleActionResult

    string

    No

    The action that you want Auto Scaling to perform after the lifecycle hook times out. Valid values:

    • CONTINUE: Auto Scaling continues to respond to a scale-in or scale-out request.

    • ABANDON: Auto Scaling releases Elastic Compute Service (ECS) instances that are created during scale-out activities or removes ECS instances from the scaling group during scale-in activities.

    • ROLLBACK: For scale-in activities, Auto Scaling rejects the requests to release ECS instances but rolls back ECS instances. For scale-out activities, the ROLLBACK setting has the same effect as the ABANDON setting.

    If you do not specify this parameter, Auto Scaling performs the action specified by the DefaultResult parameter when the lifecycle hook times out.

    If multiple lifecycle hooks exist in a scaling group and the lifecycle hooks are triggered at the same time, the following rules apply:

    • For scale-in activities, when lifecycle hooks whose LifecycleActionResult parameter is set to ABANDON or ROLLBACK time out, other lifecycle hooks time out ahead of schedule.

    • For scale-in and scale-out activities, if you set the LifecycleActionResult parameter for all lifecycle hooks to CONTINUE, Auto Scaling performs the next action only after the last lifecycle hook times out. The action that Auto Scaling performs varies based on the value that you specify for the LifecycleActionResult parameter of the lifecycle hook that last times out.

    CONTINUE
    ClientToken

    string

    No

    The client token used to ensure 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-a456-42665544****
    RegionId

    string

    No

    The region ID of the scaling group.

    cn-qingdao

    Response elements

    Element

    Type

    Description

    Example

    object

    RequestId

    string

    The ID of the request.

    473469C7-AA6F-4DC5-B3DB-A3DC0DE****

    Examples

    Success response

    JSON format

    {
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE****"
}

    Error codes

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.