Updated on 2024-11-06 GMT+08:00

Modifying Instance Specifications

Function

This API is used to modify specifications of a DCS instance in the Running state.

Calling Method

For details, see Calling APIs.

URI

POST /v2/{project_id}/instances/{instance_id}/resize

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

instance_id

Yes

String

Instance ID.

project_id

Yes

String

Project ID. For details, see Obtaining a Project ID.

Request Parameters

Table 2 Request body parameters

Parameter

Mandatory

Type

Description

spec_code

Yes

String

Flavor after the modification. The query method is as follows:

new_capacity

Yes

Integer

New memory size of the DCS instance, in GB.

For a single-node or master/standby DCS Redis 4.0 or later instance, the value can be 0.125, 0.25, 0.5, 1, 2, 4, 8, 16, 32, or 64. For a cluster instance, the value can be 4, 8, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 512, 768, or 1024. For a read/write splitting instance, the value can be 8, 16, 32, or 64.

For a single-node or master/standby DCS Memcached instance, the value can be 2, 4, 8, 16, 32, or 64.

Currently, the specifications of a Proxy Cluster DCS Redis 3.0 instance cannot be reduced. In addition to integers, 0.125, 0.25, and 0.5 are also supported.

bss_param

No

BssParamEntity object

This parameter does not need to be set for pay-per-use instances.

reserved_ip

No

Array of strings

IP addresses to retain. Mandatory during cluster scale-in. If this parameter is not set, the system randomly deletes unnecessary shards.

change_type

No

String

Modification type. Mandatory when the number of replicas of a DCS Redis 4.0 or 5.0 instance is modified.

  • createReplication: adding replicas

  • deleteReplication: deleting replicas

  • addSharding: adding shards

  • instanceType: changing the instance type. Currently, you can change a master/standby or read/write splitting DCS Redis 4.0 or 5.0 instance to the Proxy Cluster type, or from Proxy Cluster to master/standby or read/write splitting..

available_zones

No

Array of strings

Code of the AZ where each replica is in. This parameter is mandatory when you add replicas to a DCS Redis 4.0 or 5.0 instance. Before specifying an AZ, ensure that there are available resources in it. This parameter is mandatory when you delete replicas from a cluster instance.

For details, see Querying AZs.

node_list

No

Array of strings

ID of the replica to delete. This parameter is mandatory when you delete replicas of a master/standby or read/write splitting DCS Redis 4.0 or 5.0 instance. Currently, only one replica can be deleted at a time.

For details, see Querying Details of Shards and Replicas.

execute_immediately

No

Boolean

Whether to apply the change immediately. The default value is true.

  • true: Apply the change immediately.

  • false: Apply the change during the maintenance window. Specification changes can be applied during the maintenance window only in some scenarios. For details, see Modifying Specifications.

Table 3 BssParamEntity

Parameter

Mandatory

Type

Description

is_auto_pay

No

String

Indicates whether fees are deducted automatically from the account balance. Non-automatic payment is used by default.

Value range:

  • true: Fees are automatically deducted from the account balance.

  • false: The order must be paid manually. This is the default value.

Note:

If this parameter is set to true, fees will be automatically deleted from the account balance. To use cash coupons, set this parameter to false and go to the Billing Center to make the payment.

If this parameter is set to false, go to Billing Center > Orders to pay for the order after modifying specifications or creating an instance. Otherwise, the order is always pending payment and the instance modification or creation is not considered successful.

Response Parameters

None

Example Requests

Changing instance specifications to 1 GB.

POST https://{dcs_endpoint}/v2/{project_id}/instances/{instance_id}/resize

{
  "spec_code" : "redis.ha.xu1.tiny.r2.1",
  "new_capacity" : 1,
  "reserved_ip" : [ "192.168.0.125" ],
  "change_type" : "createReplication",
  "available_zones" : [ "e7afd64502d64fe3bfb60c2c82ec0ec6", "d90ff6d692954373bf53be49cf3900cb" ],
  "node_list" : [ "ff80808282eee5f90183120188ae093e" ],
  "execute_immediately" : true
}

Example Responses

None

SDK Sample Code

The SDK sample code is as follows.

Changing instance specifications to 1 GB.

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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.dcs.v2.region.DcsRegion;
import com.huaweicloud.sdk.dcs.v2.*;
import com.huaweicloud.sdk.dcs.v2.model.*;

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

public class ResizeInstanceSolution {

    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);

        DcsClient client = DcsClient.newBuilder()
                .withCredential(auth)
                .withRegion(DcsRegion.valueOf("<YOUR REGION>"))
                .build();
        ResizeInstanceRequest request = new ResizeInstanceRequest();
        request.withInstanceId("{instance_id}");
        ResizeInstanceBody body = new ResizeInstanceBody();
        List<String> listbodyNodeList = new ArrayList<>();
        listbodyNodeList.add("ff80808282eee5f90183120188ae093e");
        List<String> listbodyAvailableZones = new ArrayList<>();
        listbodyAvailableZones.add("e7afd64502d64fe3bfb60c2c82ec0ec6");
        listbodyAvailableZones.add("d90ff6d692954373bf53be49cf3900cb");
        List<String> listbodyReservedIp = new ArrayList<>();
        listbodyReservedIp.add("192.168.0.125");
        body.withExecuteImmediately(true);
        body.withNodeList(listbodyNodeList);
        body.withAvailableZones(listbodyAvailableZones);
        body.withChangeType(ResizeInstanceBody.ChangeTypeEnum.fromValue("createReplication"));
        body.withReservedIp(listbodyReservedIp);
        body.withNewCapacity(1);
        body.withSpecCode("redis.ha.xu1.tiny.r2.1");
        request.withBody(body);
        try {
            ResizeInstanceResponse response = client.resizeInstance(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());
        }
    }
}

Changing instance specifications to 1 GB.

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkdcs.v2.region.dcs_region import DcsRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkdcs.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 = DcsClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(DcsRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = ResizeInstanceRequest()
        request.instance_id = "{instance_id}"
        listNodeListbody = [
            "ff80808282eee5f90183120188ae093e"
        ]
        listAvailableZonesbody = [
            "e7afd64502d64fe3bfb60c2c82ec0ec6",
            "d90ff6d692954373bf53be49cf3900cb"
        ]
        listReservedIpbody = [
            "192.168.0.125"
        ]
        request.body = ResizeInstanceBody(
            execute_immediately=True,
            node_list=listNodeListbody,
            available_zones=listAvailableZonesbody,
            change_type="createReplication",
            reserved_ip=listReservedIpbody,
            new_capacity=1,
            spec_code="redis.ha.xu1.tiny.r2.1"
        )
        response = client.resize_instance(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Changing instance specifications to 1 GB.

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    dcs "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dcs/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dcs/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dcs/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 := dcs.NewDcsClient(
        dcs.DcsClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.ResizeInstanceRequest{}
	request.InstanceId = "{instance_id}"
	var listNodeListbody = []string{
        "ff80808282eee5f90183120188ae093e",
    }
	var listAvailableZonesbody = []string{
        "e7afd64502d64fe3bfb60c2c82ec0ec6",
	    "d90ff6d692954373bf53be49cf3900cb",
    }
	var listReservedIpbody = []string{
        "192.168.0.125",
    }
	executeImmediatelyResizeInstanceBody:= true
	changeTypeResizeInstanceBody:= model.GetResizeInstanceBodyChangeTypeEnum().CREATE_REPLICATION
	request.Body = &model.ResizeInstanceBody{
		ExecuteImmediately: &executeImmediatelyResizeInstanceBody,
		NodeList: &listNodeListbody,
		AvailableZones: &listAvailableZonesbody,
		ChangeType: &changeTypeResizeInstanceBody,
		ReservedIp: &listReservedIpbody,
		NewCapacity: int32(1),
		SpecCode: "redis.ha.xu1.tiny.r2.1",
	}
	response, err := client.ResizeInstance(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

204

DCS instance specifications modified successfully.

Error Codes

See Error Codes.