Updated on 2024-04-18 GMT+08:00

Deleting CN Nodes in Batches

Function

This API is used to delete CNs from a specified cluster.

After a cluster is created, the number of required CNs varies with service requirements. The CN management function enables you to adjust the number of CNs in the cluster.

  • Do not perform other O&M operations when adding or deleting a CN.

  • Stop services when adding or deleting a CN.

Call Method

For details, see Calling APIs.

URI

1
POST /v1.0/{project_id}/clusters/{cluster_id}/cns/batch-delete
Table 1 URI parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID. For details about how to obtain the ID, see Obtaining Project ID.

cluster_id

Yes

String

Cluster ID. For details about how to obtain the ID, see Obtaining the Cluster ID.

Request Parameters

Table 2 Request body parameters

Parameter

Mandatory

Type

Description

instances

No

Array of strings

IDs of the CNs to be deleted

Response Parameters

Status code: 200

Table 3 Response body parameters

Parameter

Type

Description

job_id

String

ID of the task for deleting CN nodes in batches.

Example Request

Remove CN nodes (CN Node ID = b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0) in batches:

POST https://{Endpoint}/v1.0/89cd04f168b84af6be287f71730fdb4b/clusters/b5c45780-1006-49e3-b2d5-b3229975bbc7/cns/batch-delete

{
  "instances" : [ "b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0" ]
}

Example Response

Status code: 200

The CN nodes are successfully deleted in batches.

{
  "job_id" : "2c908185841339ce018414e9944b0020"
}

SDK Sample Code

The sample code is as follows:

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.dws.v2.region.DwsRegion;
import com.huaweicloud.sdk.dws.v2.*;
import com.huaweicloud.sdk.dws.v2.model.*;

import java.util.List;
import java.util.ArrayList;

public class BatchDeleteClusterCnSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        DwsClient client = DwsClient.newBuilder()
                .withCredential(auth)
                .withRegion(DwsRegion.valueOf("<YOUR REGION>"))
                .build();
        BatchDeleteClusterCnRequest request = new BatchDeleteClusterCnRequest();
        BatchDeleteCn body = new BatchDeleteCn();
        List<String> listbodyInstances = new ArrayList<>();
        listbodyInstances.add("b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0");
        body.withInstances(listbodyInstances);
        request.withBody(body);
        try {
            BatchDeleteClusterCnResponse response = client.batchDeleteClusterCn(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}
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# coding: utf-8

from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkdws.v2.region.dws_region import DwsRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkdws.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.getenv("CLOUD_SDK_AK")
    sk = os.getenv("CLOUD_SDK_SK")

    credentials = BasicCredentials(ak, sk) \

    client = DwsClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(DwsRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = BatchDeleteClusterCnRequest()
        listInstancesbody = [
            "b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0"
        ]
        request.body = BatchDeleteCn(
            instances=listInstancesbody
        )
        response = client.batch_delete_cluster_cn(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)
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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    dws "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dws/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := dws.NewDwsClient(
        dws.DwsClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.BatchDeleteClusterCnRequest{}
	var listInstancesbody = []string{
        "b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0",
    }
	request.Body = &model.BatchDeleteCn{
		Instances: &listInstancesbody,
	}
	response, err := client.BatchDeleteClusterCn(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For more SDK sample codes of programming languages, visit API Explorer and click the Sample Code tab. Example codes can be automatically generated.

Status Code

Status Code

Description

200

The CN nodes are successfully deleted in batches.

400

Request error.

401

Authentication failed.

403

You do not have required permissions.

404

No resources found.

500

Internal server error.

503

The service was unavailable.