更新时间:2024-03-04 GMT+08:00
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主备切换

功能介绍

切换实例主备节点,只有主备实例支持该操作。

调用方法

请参见如何调用API

URI

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

表1 路径参数

参数

是否必选

参数类型

描述

instance_id

String

实例ID。

project_id

String

项目ID。获取方法请参见获取项目ID

请求参数

响应参数

状态码: 400

表2 响应Body参数

参数

参数类型

描述

error_msg

String

错误信息。

最大长度:1024

error_code

String

错误码。

最大长度:9

error_ext_msg

String

扩展错误信息(暂未使用,赋值为null)。

最大长度:1024

状态码: 401

表3 响应Body参数

参数

参数类型

描述

error_msg

String

错误信息。

最大长度:1024

error_code

String

错误码。

最大长度:9

error_ext_msg

String

扩展错误信息(暂未使用,赋值为null)。

最大长度:1024

状态码: 403

表4 响应Body参数

参数

参数类型

描述

error_msg

String

错误信息。

最大长度:1024

error_code

String

错误码。

最大长度:9

error_ext_msg

String

扩展错误信息(暂未使用,赋值为null)。

最大长度:1024

状态码: 404

表5 响应Body参数

参数

参数类型

描述

error_msg

String

错误信息。

最大长度:1024

error_code

String

错误码。

最大长度:9

error_ext_msg

String

扩展错误信息(暂未使用,赋值为null)。

最大长度:1024

状态码: 500

表6 响应Body参数

参数

参数类型

描述

error_msg

String

错误信息。

最大长度:1024

error_code

String

错误码。

最大长度:9

error_ext_msg

String

扩展错误信息(暂未使用,赋值为null)。

最大长度:1024

请求示例

POST https://{dcs_endpoint}/v2/a4d31cb6-3d72-4fdc-8ec9-6e3a41e47f71/instances/5560df16-cebf-4473-95c4-d1b573c16e79/swap

响应示例

状态码: 400

非法请求。

{
  "error_msg" : "Master standby swap is not supported.",
  "error_code" : "DCS.4855",
  "error_ext_msg" : null
}

SDK代码示例

SDK代码示例如下。

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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.*;


public class ChangeMasterStandbySolution {

    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);

        DcsClient client = DcsClient.newBuilder()
                .withCredential(auth)
                .withRegion(DcsRegion.valueOf("<YOUR REGION>"))
                .build();
        ChangeMasterStandbyRequest request = new ChangeMasterStandbyRequest();
        try {
            ChangeMasterStandbyResponse response = client.changeMasterStandby(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 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 = __import__('os').getenv("CLOUD_SDK_AK")
    sk = __import__('os').getenv("CLOUD_SDK_SK")

    credentials = BasicCredentials(ak, sk) \

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

    try:
        request = ChangeMasterStandbyRequest()
        response = client.change_master_standby(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"
    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")

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

    client := dcs.NewDcsClient(
        dcs.DcsClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.ChangeMasterStandbyRequest{}
	response, err := client.ChangeMasterStandby(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

更多编程语言的SDK代码示例,请参见API Explorer的代码示例页签,可生成自动对应的SDK代码示例。

状态码

状态码

描述

204

主备切换成功。

400

非法请求。

401

认证信息非法。

403

请求被拒绝访问。

404

所请求的资源不存在。

500

内部服务错误。

错误码

请参见错误码

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