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ENS:AttachEnsInstances

Last Updated:Apr 14, 2026

Add ENS instances to Container Service for Kubernetes.

Operation description

  • Maximum request rate per user: 10 requests per second.

  • After the command script runs successfully, the instance restarts and loads automatically.

  • Instance requirements: minimum size of 2C4G and CentOS 7.4 or later image.

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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

ens:AttachEnsInstances

update

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

InstanceId

string

Yes

The instance ID. Only one ID is supported.

testInstacneId

Scripts

string

Yes

The command to run on the instance, encoded in Base64 using UTF-8.

wget d2dldCBodHRwOi8vYWxpYWNzLWs4cy1jbxxxx

Response elements

Element

Type

Description

Example

object

RequestId

string

The request ID.

C0003E8B-B930-4F59-ADC0-0E209A9012A8

Examples

Success response

JSON format

{
  "RequestId": "C0003E8B-B930-4F59-ADC0-0E209A9012A8"
}

Error codes

HTTP status code

Error code

Error message

Description

400 MissingParameter The input parameter domainName that is mandatory for processing this request is not supplied.
400 InstanceIdNotFound The input parameter instancdId that is not found. The specified instance ID does not exist.
400 ServiceConfigInvalid The specified InstanceType is not support.
400 NoPermission Permission denied.
400 CallInterface Call Interface Happen Error. An error occurred when you call the operation.
400 StockNotEnough The specified configuration is unavailable. Reconfigure and try again.
400 IllegalInsatanceSpec The specified Instance Spec is illegal. The current operation does not support this instance type.
400 InvalidParameter.%s The specified field %s invalid. Please check it again.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.