DescribeLifecycleHooks - Auto Scaling - Alibaba Cloud Documentation Center

Queries information about lifecycle hooks by lifecycle hook ID or scaling group ID, including the default action after the wait state ends, the type of scaling activity associated with the lifecycle hook, the notification object identifier, and the suspension wait time.

Operation description

You can query lifecycle hooks in the following three ways:

Specify a list of lifecycle hook IDs (LifecycleHookId.N). In this case, the scaling group ID (ScalingGroupId) and lifecycle hook name (LifecycleHookName) parameters are ignored.
Specify a scaling group ID (ScalingGroupId).
Specify both a scaling group ID (ScalingGroupId) and a lifecycle hook name (LifecycleHookName).

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Test

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:DescribeLifecycleHooks

get

*ScalingGroup

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

None

Request parameters

Parameter	Type	Required	Description	Example
ScalingGroupId	string	No	The ID of the scaling group.	asg-bp1igpak5ft1flyp****
LifecycleHookName	string	No	The name of the lifecycle hook.	lifecyclehook****
PageNumber	integer	No	The page number of the instance status list. Minimum value: 1. Default value: 1.	1
PageSize	integer	No	The number of entries per page for a paged query. Maximum value: 50. Default value: 50.	50
LifecycleHookId	array	No	The list of lifecycle hook IDs.	ash-bp19d1032y9kij96****
	string	No	The ID of the lifecycle hook.	ash-bp1at9ufhmcf9cmy****
RegionId	string	No	The ID of the region where the scaling group resides.	cn-beijing

Response elements

Element	Type	Description	Example
	object
RequestId	string	The request ID.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E
PageNumber	integer	The page number of the returned page.	1
PageSize	integer	The number of entries returned per page.	50
TotalCount	integer	The total number of lifecycle hooks.	1
LifecycleHooks	object
LifecycleHook	array<object>	The list of lifecycle hook information.
	object	The lifecycle hook information.
DefaultResult	string	The next action to take after the instance wait state ends.	CONTINUE
LifecycleHookId	string	The ID of the lifecycle hook.	ash-bp19d1032y9kij96****
LifecycleHookName	string	The name of the lifecycle hook.	lifecyclehook****
LifecycleTransition	string	The type of scaling activity associated with the lifecycle hook.	SCALE_OUT
NotificationMetadata	string	The fixed string information for the wait state of the scaling activity.	Test Lifecycle Hook.
NotificationArn	string	The notification object identifier of the lifecycle hook. The parameter format is as follows: No notification configured: `acs:ess:{region-id}:{account-id}:null/null`. MNS queue: `acs:mns:{region-id}:{account-id}:queue/{queuename}`. MNS topic: `acs:mns:{region-id}:{account-id}:topic/{topicname}`. OOS template: `acs:oos:{region-id}:{account-id}:template/{templatename}`. EventBridge: `acs:eventbridge:{region-id}:{account-id}:eventbus/default`. The variables in the parameter format have the following meanings: region-id: the ID of the region where the scaling group resides. account-id: the Alibaba Cloud account ID. queuename: the name of the MNS queue. topicname: the name of the MNS topic. templatename: the name of the OOS template.	acs:ess:cn-beijing:161456884340****:null/null
HeartbeatTimeout	integer	The wait time that the lifecycle hook sets for the scaling activity. The next action is performed after the wait time expires.	60
ScalingGroupId	string	The ID of the scaling group.	asg-bp1igpak5ft1flyp****
LifecycleHookStatus	string	The status of the lifecycle hook. Valid values: Active: enabled. InActive: disabled.	Active

Examples

Success response

JSON format

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E",
  "PageNumber": 1,
  "PageSize": 50,
  "TotalCount": 1,
  "LifecycleHooks": {
    "LifecycleHook": [
      {
        "DefaultResult": "CONTINUE",
        "LifecycleHookId": "ash-bp19d1032y9kij96****",
        "LifecycleHookName": "lifecyclehook****",
        "LifecycleTransition": "SCALE_OUT",
        "NotificationMetadata": "Test Lifecycle Hook.",
        "NotificationArn": "acs:ess:cn-beijing:161456884340****:null/null",
        "HeartbeatTimeout": 60,
        "ScalingGroupId": "asg-bp1igpak5ft1flyp****",
        "LifecycleHookStatus": "Active"
      }
    ]
  }
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.