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Alibaba Cloud Service Mesh:DescribeNodesInstanceType

Last Updated:Dec 03, 2025

You can call the DescribeNodesInstanceType operation to query the types of data plane nodes and determine whether MultiBuffer performance acceleration is supported.

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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

servicemesh:DescribeNodesInstanceType

get

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

ServiceMeshId

string

Yes

The ID of the ASM instance.

cb8963379255149cb98c8686f274x****

Response elements

Element

Type

Description

Example

object

The response object.

InstanceTypes

array<object>

A list of node type information.

object

The node type information.

NodeType

string

The instance type of the node.

ecs.g7.xlarge

MultiBufferEnabled

boolean

Indicates whether the MultiBuffer acceleration feature is supported. Valid values:

  • true: The MultiBuffer acceleration feature is supported.

  • false: The MultiBuffer acceleration feature is not supported.

true

Key

string

The key of the node label that supports MultiBuffer optimization. If you specify this parameter, MultiBuffer optimization is enabled only when a pod is scheduled to a node that has this label key and a label value that matches the `Value` parameter.

feature.node.kubernetes.io/mb-feature-enable

Value

string

The value of the node label that supports MultiBuffer optimization. If you specify this parameter, MultiBuffer optimization is enabled only when a pod is scheduled to a node that has the specified `Key` and a label value that matches this parameter.

true

RequestId

string

The request ID.

BD65C0AD-D3C6-48D3-8D93-38D2015C****

Examples

Success response

JSON format

{
  "InstanceTypes": [
    {
      "NodeType": "ecs.g7.xlarge",
      "MultiBufferEnabled": true,
      "Key": "feature.node.kubernetes.io/mb-feature-enable",
      "Value": "true"
    }
  ],
  "RequestId": "BD65C0AD-D3C6-48D3-8D93-38D2015C****"
}

Error codes

HTTP status code

Error code

Error message

Description

500 ERR500 An internal server error occurred.

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.