Scale Down ENS Clusters by Removing Nodes via API - ENS - Alibaba Cloud - ENS

You can call this operation to remove one or more nodes from a cluster. The ReleaseNode parameter controls whether to release the underlying ENS compute instance, and its default value is false. If a node being removed is in the failed state, this parameter is ignored and the corresponding compute instance is released by default. For an ENS compute instance attached via a script from the DescribeAttachScript operation, this parameter is also ignored, and the instance is not released by default.

Operation description

If you set the ReleaseNode parameter to false, you must manually stop the kubelet process on the node before calling this operation. Otherwise, the node may automatically rejoin the cluster.

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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

ens:DeleteClusterNodes

delete

*All Resource

*

None

Request parameters

Parameter	Type	Required	Description	Example
ClusterId	string	Yes	The cluster ID.	eck-xxxxxxxx
Body	object	Yes	The request body.
Nodes	array	Yes	A list of nodes to remove.
	string	Yes	The node ID.	["i-5xxxxxxxxxxx"]
ReleaseNode	boolean	No	Specifies whether to release the underlying ENS instance for the node. Default value: `true`.

Response elements

Element	Type	Description	Example
	object	The response object.
RequestId	string	The request ID.	CEF72CEB-54B6-4AE8-B225-F876FF7BA984

Examples

Success response

JSON format

{
  "RequestId": "CEF72CEB-54B6-4AE8-B225-F876FF7BA984"
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.