Deleting CN Nodes in Batches
Function
After a cluster is created, the number of required CN nodes varies with workloads. You can add or delete CN nodes as needed.
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Other O&M operations cannot be performed during CN addition or deletion.
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Services need to be stopped during CN node addition or deletion. You are advised to perform this operation during off-peak hours or when services are interrupted.
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If a fault occurs during CN node addition or deletion and the rollback fails, you need to log in to the backend to rectify the fault. For details, see "Cluster Usage" > "Failed to Roll Back CN Addition or Deletion" in Troubleshooting.
Calling Method
For details, see Calling APIs.
URI
POST /v1.0/{project_id}/clusters/{cluster_id}/cns/batch-delete
| Parameter | Mandatory | Type | Description |
|---|---|---|---|
| project_id | Yes | String | Definition Project ID. To obtain the value, see Obtaining a Project ID. Constraints N/A Range N/A Default Value N/A |
| cluster_id | Yes | String | Definition Cluster ID. For details about how to obtain the value, see Obtaining the Cluster ID. Constraints N/A Range N/A Default Value N/A |
Request Parameters
| Parameter | Mandatory | Type | Description |
|---|---|---|---|
| instances | No | Array of strings | Definition IDs of the CN nodes to be deleted. Constraints N/A Range The value cannot be left blank. Default Value N/A |
Response Parameters
Status code: 200
| Parameter | Type | Description |
|---|---|---|
| job_id | String | Definition Task ID for deleting CN nodes in batches. Range N/A |
Example Requests
Delete CN nodes whose IDs are " 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 Responses
Status code: 200
The CN nodes are successfully deleted in batches.
{
"job_id" : "2c908185841339ce018414e9944b0020"
} SDK Sample Code
The SDK sample code is as follows.
Delete CN nodes whose IDs are " b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0" in batches.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | 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"); String projectId = "{project_id}"; ICredential auth = new BasicCredentials() .withProjectId(projectId) .withAk(ak) .withSk(sk); DwsClient client = DwsClient.newBuilder() .withCredential(auth) .withRegion(DwsRegion.valueOf("<YOUR REGION>")) .build(); BatchDeleteClusterCnRequest request = new BatchDeleteClusterCnRequest(); request.withClusterId("{cluster_id}"); 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()); } } } |
Delete CN nodes whose IDs are " b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0" in batches.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | # coding: utf-8 import os 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.environ["CLOUD_SDK_AK"] sk = os.environ["CLOUD_SDK_SK"] projectId = "{project_id}" credentials = BasicCredentials(ak, sk, projectId) client = DwsClient.new_builder() \ .with_credentials(credentials) \ .with_region(DwsRegion.value_of("<YOUR REGION>")) \ .build() try: request = BatchDeleteClusterCnRequest() request.cluster_id = "{cluster_id}" 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) |
Delete CN nodes whose IDs are " b6ad3dc3-d2de-4d2c-a5df-fdde58eca8f0" in batches.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | 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") projectId := "{project_id}" auth := basic.NewCredentialsBuilder(). WithAk(ak). WithSk(sk). WithProjectId(projectId). Build() client := dws.NewDwsClient( dws.DwsClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.BatchDeleteClusterCnRequest{} request.ClusterId = "{cluster_id}" 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 SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.
Status Codes
| 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 | Service unavailable. |
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