Last updated: 2021-05-12 10:27:37

1. API Description

Domain name for API request:

This API is used to add one or more existing instances to a cluster.

A maximum of 20 requests can be initiated per second for this API.

Note: This API supports Finance regions. If the common parameter Region is a Finance region, a domain name with the Finance region needs to be specified, for example:

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2. Input Parameters

The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.

Parameter Name Required Type Description
Action Yes String Common parameter. The value used for this API: AddExistedInstances.
Version Yes String Common parameter. The value used for this API: 2018-05-25.
Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
ClusterId Yes String Cluster ID
InstanceIds.N Yes Array of String Instance list. Spot instance is not supported.
InstanceAdvancedSettings No InstanceAdvancedSettings Detailed information of the instance
EnhancedService No EnhancedService Enhanced services. This parameter is used to specify whether to enable Cloud Security, Cloud Monitoring and other services. If this parameter is not specified, Cloud Monitor and Cloud Security are enabled by default.
LoginSettings No LoginSettings Node login information (currently only supports using Password or single KeyIds)
HostName No String When reinstalling the system, you can specify the HostName of the modified instance (when the cluster is in HostName mode, this parameter is required, and the rule name is the same as the Create CVM Instance API HostName except for uppercase letters not being supported.
SecurityGroupIds.N No Array of String Security group to which the instance belongs. This parameter can be obtained from the sgId field returned by DescribeSecurityGroups. If this parameter is not specified, the default security group is bound. (Currently, you can only set a single sgId)
NodePool No NodePoolOption Node pool options
SkipValidateOptions.N No Array of String Skips the specified verification. Valid values: GlobalRouteCIDRCheck, VpcCniCIDRCheck

3. Output Parameters

Parameter Name Type Description
FailedInstanceIds Array of String IDs of failed nodes
Note: This field may return null, indicating that no valid value was found.
SuccInstanceIds Array of String IDs of successful nodes
Note: This field may return null, indicating that no valid value was found.
TimeoutInstanceIds Array of String IDs of (successful or failed) nodes that timed out
Note: This field may return null, indicating that no valid value was found.
FailedReasons Array of String Causes of the failure to add a node to a cluster
Note: this field may return null, indicating that no valid value is obtained.
RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

4. Example

Example1 Adding existing instances to a cluster

This example shows you how to add existing instances to a cluster.

Input Example
&<Common request parameters>

Output Example

  "Response": {
    "TimeoutInstanceIds": [
    "SuccInstanceIds": [
    "FailedInstanceIds": [
    "RequestId": "eac6b301-a322-493a-8e36-83b295459397",
    "FailedReasons": [
      "InstanceId ins-lqdahrp5 ServiceResetCvmV3 failed ..."

5. Developer Resources


TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

Command Line Interface

6. Error Code

The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

Error Code Description
InternalError Internal error.
InternalError.ClusterNotFound Cluster not found.
InternalError.ClusterState Cluster status error.
InternalError.CvmCommon Error in node creation.
InternalError.Db DB error.
InternalError.DbAffectivedRows Database error.
InternalError.Param Parameter error.
InternalError.UnexceptedInternal Internal error.
InternalError.UnexpectedInternal Unknown internal error.
InvalidParameter Parameter error.
LimitExceeded Quota limit is exceeded.