You can call AttachInstances to add existing Elastic Compute Service (ECS) instances to a cluster.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameter types

This operation uses only common request parameters. For more information, see Common parameters.

Request syntax

post /clusters/{ClusterId}/attach http|https

Request parameters

Parameter Type Required Example Description
ClusterId String Yes c106f377e16f34eb1808d6b9362c9****

The ID of the cluster.

body Object No

The request body.

cpu_policy String No none

The CPU management policy.

format_disk Boolean No false

Specifies whether to format data disks.

image_id String No aliyun_2_1903_x64_20G_alibase_20200529.vhd

The ID of the custom image.

instances Array of String No i-2zed0sswuau6o89b****

The IDs of the ECS instances.

is_edge_worker Boolean No false

Specifies whether the node that you want to add is an Edge Node Service (ENS) instance.

keep_instance_name Boolean No true

Specifies whether to retain the names of the ECS instances.

key_pair String No ***

The name of the key pair. You must set key_pair or password.

nodepool_id String No np615c0e0966124216a0412e10afe0****

The ID of the node pool.

password String No Hello1234

The SSH logon password. You must set password or key_pair.

rds_instances Array of String No rds-xxx

The IDs of the RDS instances.

runtime Object No

The configuration of the container runtime.

name String No docker

The name of the container runtime.

version String No 19.03.5

The version of the container runtime.

tags Array No

The tags of the cluster.

key String No k-aa

The key of the tag.

value String No v-aa

The value of the tag.

user_data String No ***

The user data of the node.

Response parameters

Parameter Type Example Description
list Array of list

A list of the ECS instances.

code String "200"

The HTTP status code.

instanceId String "i-2ze0lgm3y6iylcbt****"

The IDs of the nodes.

message String "successful"

Indicates whether the ECS instance is added to the cluster.

task_id String "T-5a544aff80282e39ea000039"

The ID of the task.


Sample requests

POST /clusters/[ClusterId]/attach HTTP/1.1
Common request parameters
    "ClusterId": "c106f377e16f34eb1808d6b9362c9****",

Sample success responses

XML format


JSON format

    "task_id": "T-5a544aff80282e39ea000039",
    "list": [
            "code": "200",
            "instanceId": "i-2ze0lgm3y6iylcbt****",
            "message": "successful"

Error codes

For a list of error codes, visit the API Error Center.