Scaling In Nodes of a Specific Type
Function
This API is used to remove instances of specific types and reduce instance storage capacity in a cluster. Yearly/Monthly clusters do not support the removal of specified node types by calling this API.

Calling Method
For details, see Calling APIs.
URI
POST /v1.0/extend/{project_id}/clusters/{cluster_id}/role/shrink
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
project_id |
Yes |
String |
Definition: Project ID. For details about how to obtain the project ID and name, see Obtaining the Project ID and Name. Constraints: N/A Value range: Project ID of the account. Default value: N/A |
cluster_id |
Yes |
String |
Definition: ID of the cluster you want to scale in. For details about how to obtain the cluster ID, see Obtaining the Cluster ID. Constraints: N/A Value range: Cluster ID. Default value: N/A |
Request Parameters
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
shrink |
Yes |
Array of ShrinkNodeReq objects |
Parameter description: Type and quantity of nodes you want to scale in. |
agency_name |
No |
String |
Definition: Agency name. You can create an agency to allow CSS to call other cloud services. Constraints: VPC permissions required by the agency: "vpc:subnets:get","vpc:ports:*". This parameter is mandatory when the new IAM plane is connected. This parameter is optional when the old IAM plane is connected. Value range: N/A Default value: N/A |
operation_type |
No |
String |
Definition: Operation type. The value can be vm or volume. The default value is vm. Constraints: N/A Value range: vm: Reduce nodes. volume: Reduce the disk size. Default value: vm |
cluster_load_check |
No |
Boolean |
Definition: Whether to check the cluster load. The value can be true or false. The default value is true. Constraints: N/A Value range: true: enable cluster load check. true: skip cluster load check. Default value: true |
Parameter |
Mandatory |
Type |
Description |
---|---|---|---|
reducedNodeNum |
Yes |
Integer |
Definition: Number of nodes you want to reduce.
For a cluster with master nodes, the number of removed master nodes in a scale-in must be fewer than half of the number of the original master nodes. After scale-in, there has to be an odd number of master nodes, and there has to be at least three of them. |
type |
Yes |
String |
Parameter description: Node type. Options:
|
new_disk_size |
No |
Integer |
Definition: New disk size. Constraints: N/A Value range:
|
Response Parameters
Status code: 200
Request succeeded.
None
Example Requests
Scale in a cluster by scaling in specified type of nodes.
POST https://{Endpoint}/v1.0/extend/{project_id}/clusters/4f3deec3-efa8-4598-bf91-560aad1377a3/role/shrink { "shrink" : [ { "type" : "ess", "reducedNodeNum" : 1 } ] }
Example Responses
None
SDK Sample Code
The SDK sample code is as follows.
Java
Scale in a cluster by scaling in specified type of nodes.
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 56 57 58 59 |
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.css.v1.region.CssRegion; import com.huaweicloud.sdk.css.v1.*; import com.huaweicloud.sdk.css.v1.model.*; import java.util.List; import java.util.ArrayList; public class UpdateShrinkClusterSolution { 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); CssClient client = CssClient.newBuilder() .withCredential(auth) .withRegion(CssRegion.valueOf("<YOUR REGION>")) .build(); UpdateShrinkClusterRequest request = new UpdateShrinkClusterRequest(); request.withClusterId("{cluster_id}"); ShrinkClusterReq body = new ShrinkClusterReq(); List<ShrinkNodeReq> listbodyShrink = new ArrayList<>(); listbodyShrink.add( new ShrinkNodeReq() .withReducedNodeNum(1) .withType("ess") ); body.withShrink(listbodyShrink); request.withBody(body); try { UpdateShrinkClusterResponse response = client.updateShrinkCluster(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()); } } } |
Python
Scale in a cluster by scaling in specified type of nodes.
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 |
# coding: utf-8 import os from huaweicloudsdkcore.auth.credentials import BasicCredentials from huaweicloudsdkcss.v1.region.css_region import CssRegion from huaweicloudsdkcore.exceptions import exceptions from huaweicloudsdkcss.v1 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 = CssClient.new_builder() \ .with_credentials(credentials) \ .with_region(CssRegion.value_of("<YOUR REGION>")) \ .build() try: request = UpdateShrinkClusterRequest() request.cluster_id = "{cluster_id}" listShrinkbody = [ ShrinkNodeReq( reduced_node_num=1, type="ess" ) ] request.body = ShrinkClusterReq( shrink=listShrinkbody ) response = client.update_shrink_cluster(request) print(response) except exceptions.ClientRequestException as e: print(e.status_code) print(e.request_id) print(e.error_code) print(e.error_msg) |
Go
Scale in a cluster by scaling in specified type of nodes.
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 |
package main import ( "fmt" "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic" css "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/css/v1" "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/css/v1/model" region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/css/v1/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 := css.NewCssClient( css.CssClientBuilder(). WithRegion(region.ValueOf("<YOUR REGION>")). WithCredential(auth). Build()) request := &model.UpdateShrinkClusterRequest{} request.ClusterId = "{cluster_id}" var listShrinkbody = []model.ShrinkNodeReq{ { ReducedNodeNum: int32(1), Type: "ess", }, } request.Body = &model.ShrinkClusterReq{ Shrink: listShrinkbody, } response, err := client.UpdateShrinkCluster(request) if err == nil { fmt.Printf("%+v\n", response) } else { fmt.Println(err) } } |
More
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 |
Request succeeded. |
400 |
Invalid request. Modify the request before retry. |
409 |
The request could not be completed due to a conflict with the current state of the resource. The resource that the client attempts to create already exists, or the update request fails to be processed because of a conflict. |
412 |
The server did not meet one of the preconditions contained in the request. |
Error Codes
See Error Codes.
Feedback
Was this page helpful?
Provide feedbackThank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.
For any further questions, feel free to contact us through the chatbot.
Chatbot