文档首页/ 弹性负载均衡 ELB/ API参考/ API（V3）/ 后端服务器/ 创建后端服务器

更新时间：2024-09-26 GMT+08:00

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创建后端服务器

功能介绍

创建后端服务器。

接口约束

1.同一个pool下的两个member不能有相同的address和port。

2.若所属LB开启跨VPC特性，创建member时可以不指定的子网，表示创建跨VPC的后端服务器。

此时address必须为ipv4地址，pool的协议必须为TCP/HTTP/HTTPS。

3.创建member时若指定了子网，则该子网必须和负载均衡器所在子网处在同一个VPC下。

4.如果pool是dualstack的，address支持IPv4格式也支持IPv6格式，

如果pool是v4的，address 只支持IPv4。

5.创建member时，若请求参数type为instance，则参数address不允许为任何ELB的私网IP。

调用方法

请参见如何调用API。

URI

POST /v3/{project_id}/elb/pools/{pool_id}/members

表1 路径参数
参数	是否必选	参数类型	描述
pool_id	是	String	参数解释：后端服务器组ID。
project_id	是	String	参数解释：项目ID。

请求参数

表2 请求Header参数
参数	是否必选	参数类型	描述
X-Auth-Token	是	String	参数解释：IAM鉴权Token。

表3 请求Body参数
参数	是否必选	参数类型	描述
member	是	CreateMemberOption object	参数解释：后端服务器对象。

表4 CreateMemberOption
参数	是否必选	参数类型	描述
address	是	String	参数解释：后端服务器对应的IP地址。约束限制：若subnet_cidr_id为空，表示添加跨VPC后端，此时address必须为IPv4地址。若subnet_cidr_id不为空，表示是一个关联到ECS的后端服务器。该IP地址可以是私网IPv4或IPv6。但必须在subnet_cidr_id对应的子网网段中。
admin_state_up	否	Boolean	参数解释：后端服务器的管理状态。约束限制：虽然创建、更新请求支持该字段，但实际取值决定于后端服务器对应的弹性云服务器是否存在。若存在，该值为true，否则，该值为false。取值范围：true、false。
name	否	String	参数解释：后端服务器名称。注意：该名称并非ECS名称，若不传则返回为空。
project_id	否	String	参数解释：后端服务器所在的项目ID。
protocol_port	否	Integer	参数解释：后端服务器业务端口。约束限制：在开启端口透传的pool下创建member传该字段不生效，可不传该字段。
subnet_cidr_id	否	String	参数解释：后端服务器所在的子网，可以是IPv4或IPv6子网。若是IPv4子网，使用对应子网的子网ID（neutron_subnet_id）；若是IPv6子网，使用对应子网的网络ID（neutron_network_id）。 ipv4子网的子网ID可以通过GET https://{VPC_Endpoint}/v1/{project_id}/subnets 响应参数中的neutron_subnet_id得到 ipv6子网的网络ID可以通过GET https://{VPC_Endpoint}/v1/{project_id}/subnets 响应参数中的neutron_network_id得到约束限制：该子网和关联的负载均衡器的子网必须在同一VPC下。若所属LB的跨VPC后端转发已开启（ip_target_enable=true），则该字段可以不传，表示添加跨VPC的后端服务器。此时address必须为IPv4地址，所在的pool的协议必须为UDP/TCP/TLS/HTTP/HTTPS/QUIC/GRPC。若所属LB未开启跨VPC后端转发，该参数必填。
weight	否	Integer	参数解释：后端服务器的权重，请求将根据pool配置的负载均衡算法和后端服务器的权重进行负载分发。权重值越大，分发的请求越多。权重为0的后端不再接受新的请求。约束限制：若所在pool的lb_algorithm取值为SOURCE_IP或QUIC_CID，该字段无效。取值范围：0-100，默认1。

响应参数

状态码： 201

表5 响应Body参数
参数	参数类型	描述
request_id	String	参数解释：请求ID。注：自动生成。
member	Member object	参数解释：后端服务器对象。

表6 Member
参数	参数类型	描述
id	String	参数解释：后端服务器ID。说明：说明：此处并非ECS服务器的ID，而是ELB为绑定的后端服务器自动生成的member ID。
name	String	参数解释：后端服务器名称。注意：该名称并非ECS名称。
project_id	String	参数解释：后端服务器所在的项目ID。
admin_state_up	Boolean	参数解释：后端服务器的管理状态。约束限制：虽然创建、更新请求支持该字段，但实际取值决定于后端服务器对应的弹性云服务器是否存在。若存在，该值为true，否则，该值为false。取值范围：true、false。
subnet_cidr_id	String	参数解释：后端服务器所在的子网，可以是IPv4或IPv6子网。若是IPv4子网，使用对应子网的子网ID（neutron_subnet_id）；若是IPv6子网，使用对应子网的网络ID（neutron_network_id）。 ipv4子网的子网ID可以通过GET https://{VPC_Endpoint}/v1/{project_id}/subnets 响应参数中的neutron_subnet_id得到 ipv6子网的网络ID可以通过GET https://{VPC_Endpoint}/v1/{project_id}/subnets 响应参数中的neutron_network_id得到约束限制：该子网和关联的负载均衡器的子网必须在同一VPC下。若所属LB的跨VPC后端转发特性已开启，则该字段可以不传，表示添加跨VPC的后端服务器。此时address必须为IPv4地址，所在的pool的协议必须为UDP/TCP/TLS/HTTP/HTTPS/QUIC/GRPC。
protocol_port	Integer	参数解释：后端服务器业务端口。说明：在开启端口透传的pool下创建member传该字段不生效，可不传该字段。
weight	Integer	参数解释：后端服务器的权重，请求将根据pool配置的负载均衡算法和后端服务器的权重进行负载分发。权重值越大，分发的请求越多。权重为0的后端不再接受新的请求。约束限制：若所在pool的lb_algorithm取值为SOURCE_IP或QUIC_CID，该字段无效。取值范围：0-100 默认取值：1。
address	String	参数解释：后端服务器对应的IP地址。约束限制：若subnet_cidr_id为空，表示添加跨VPC后端，此时address必须为IPv4地址。若subnet_cidr_id不为空，表示是一个关联到ECS的后端服务器。该IP地址可以是私网IPv4或IPv6。但必须在subnet_cidr_id对应的子网网段中。
ip_version	String	参数解释：当前后端服务器的IP地址版本，由后端系统自动根据传入的address字段确定。取值范围：v4、v6。
operating_status	String	参数解释：后端服务器的健康状态。当status非空时，以status字段中监听器粒度的健康检查状态优先。取值范围： ONLINE：后端服务器正常。 NO_MONITOR：后端服务器所在的服务器组没有健康检查器。 OFFLINE：后端服务器关联的ECS服务器不存在或已关机。
status	Array of MemberStatus objects	参数解释：后端服务器监听器粒度的的健康状态。约束限制：若绑定的监听器在该字段中，则以该字段中监听器对应的operating_stauts为准。若绑定的监听器不在该字段中，则以外层的operating_status为准。
created_at	String	参数解释：创建时间。格式：yyyy-MM-dd'T'HH:mm:ss'Z'，UTC时区。注意：独享型实例的历史数据以及共享型实例下的资源，不返回该字段。
updated_at	String	参数解释：更新时间。格式：yyyy-MM-dd'T'HH:mm:ss'Z'，UTC时区。注意：独享型实例的历史数据以及共享型实例下的资源，不返回该字段。
member_type	String	参数解释：后端服务器的类型。取值范围： ip：跨VPC的member。 instance：关联到ECS的member。
instance_id	String	参数解释：member关联的实例ID。空表示member关联的实例为非真实设备（如：跨VPC场景）

表7 MemberStatus
参数	参数类型	描述
listener_id	String	参数解释：监听器ID
operating_status	String	参数解释：后端服务器的健康状态。取值范围： ONLINE：后端服务器正常。 NO_MONITOR：后端服务器所在的服务器组没有健康检查器。 OFFLINE：后端服务器关联的ECS服务器不存在或已关机。

请求示例

示例1：创建后端服务器

POST https://{ELB_Endpoint}/v3/99a3fff0d03c428eac3678da6a7d0f24/elb/pools/36ce7086-a496-4666-9064-5ba0e6840c75/members

{
  "member" : {
    "subnet_cidr_id" : "c09f620e-3492-4429-ac15-445d5dd9ca74",
    "protocol_port" : 89,
    "name" : "My member",
    "address" : "120.10.10.16"
  }
}

示例2：创建开启跨VPC的后端服务器

POST https://{ELB_Endpoint}/v3/99a3fff0d03c428eac3678da6a7d0f24/elb/pools/36ce7086-a496-4666-9064-5ba0e6840c75/members

{
  "member" : {
    "protocol_port" : 89,
    "name" : "My member",
    "address" : "120.10.10.16"
  }
}

响应示例

状态码： 201

POST操作正常返回。

{
  "member" : {
    "name" : "My member",
    "weight" : 1,
    "admin_state_up" : false,
    "subnet_cidr_id" : "c09f620e-3492-4429-ac15-445d5dd9ca74",
    "project_id" : "99a3fff0d03c428eac3678da6a7d0f24",
    "address" : "120.10.10.16",
    "protocol_port" : 89,
    "id" : "1923923e-fe8a-484f-bdbc-e11559b1f48f",
    "operating_status" : "NO_MONITOR",
    "status" : [ {
      "listener_id" : "427eee03-b569-4d6c-b1f1-712032f7ec2d",
      "operating_status" : "NO_MONITOR"
    } ],
    "ip_version" : "v4"
  },
  "request_id" : "f354090d-41db-41e0-89c6-7a943ec50792"
}

SDK代码示例

SDK代码示例如下。

示例1：创建后端服务器

        
         
           
           
             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.elb.v3.region.ElbRegion;
import com.huaweicloud.sdk.elb.v3.*;
import com.huaweicloud.sdk.elb.v3.model.*;


public class CreateMemberSolution {

    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);

        ElbClient client = ElbClient.newBuilder()
                .withCredential(auth)
                .withRegion(ElbRegion.valueOf("<YOUR REGION>"))
                .build();
        CreateMemberRequest request = new CreateMemberRequest();
        request.withPoolId("{pool_id}");
        CreateMemberRequestBody body = new CreateMemberRequestBody();
        CreateMemberOption memberbody = new CreateMemberOption();
        memberbody.withAddress("120.10.10.16")
            .withName("My member")
            .withProtocolPort(89)
            .withSubnetCidrId("c09f620e-3492-4429-ac15-445d5dd9ca74");
        body.withMember(memberbody);
        request.withBody(body);
        try {
            CreateMemberResponse response = client.createMember(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());
        }
    }
}

            

          

        
       

示例2：创建开启跨VPC的后端服务器

        
         
           
           
             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.elb.v3.region.ElbRegion;
import com.huaweicloud.sdk.elb.v3.*;
import com.huaweicloud.sdk.elb.v3.model.*;


public class CreateMemberSolution {

    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);

        ElbClient client = ElbClient.newBuilder()
                .withCredential(auth)
                .withRegion(ElbRegion.valueOf("<YOUR REGION>"))
                .build();
        CreateMemberRequest request = new CreateMemberRequest();
        request.withPoolId("{pool_id}");
        CreateMemberRequestBody body = new CreateMemberRequestBody();
        CreateMemberOption memberbody = new CreateMemberOption();
        memberbody.withAddress("120.10.10.16")
            .withName("My member")
            .withProtocolPort(89);
        body.withMember(memberbody);
        request.withBody(body);
        try {
            CreateMemberResponse response = client.createMember(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());
        }
    }
}

            

          

        
       

示例1：创建后端服务器

        
         
           
           
             # coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkelb.v3.region.elb_region import ElbRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkelb.v3 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 = ElbClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(ElbRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CreateMemberRequest()
        request.pool_id = "{pool_id}"
        memberbody = CreateMemberOption(
            address="120.10.10.16",
            name="My member",
            protocol_port=89,
            subnet_cidr_id="c09f620e-3492-4429-ac15-445d5dd9ca74"
        )
        request.body = CreateMemberRequestBody(
            member=memberbody
        )
        response = client.create_member(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

            

          

        
       

示例2：创建开启跨VPC的后端服务器

        
         
           
           
             # coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkelb.v3.region.elb_region import ElbRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkelb.v3 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 = ElbClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(ElbRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CreateMemberRequest()
        request.pool_id = "{pool_id}"
        memberbody = CreateMemberOption(
            address="120.10.10.16",
            name="My member",
            protocol_port=89
        )
        request.body = CreateMemberRequestBody(
            member=memberbody
        )
        response = client.create_member(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

            

          

        
       

示例1：创建后端服务器

        
         
           
           
             package main

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

    request := &model.CreateMemberRequest{}
	request.PoolId = "{pool_id}"
	nameMember:= "My member"
	protocolPortMember:= int32(89)
	subnetCidrIdMember:= "c09f620e-3492-4429-ac15-445d5dd9ca74"
	memberbody := &model.CreateMemberOption{
		Address: "120.10.10.16",
		Name: &nameMember,
		ProtocolPort: &protocolPortMember,
		SubnetCidrId: &subnetCidrIdMember,
	}
	request.Body = &model.CreateMemberRequestBody{
		Member: memberbody,
	}
	response, err := client.CreateMember(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

            

          

        
       

示例2：创建开启跨VPC的后端服务器

        
         
           
           
             package main

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

    request := &model.CreateMemberRequest{}
	request.PoolId = "{pool_id}"
	nameMember:= "My member"
	protocolPortMember:= int32(89)
	memberbody := &model.CreateMemberOption{
		Address: "120.10.10.16",
		Name: &nameMember,
		ProtocolPort: &protocolPortMember,
	}
	request.Body = &model.CreateMemberRequestBody{
		Member: memberbody,
	}
	response, err := client.CreateMember(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
201	POST操作正常返回。

错误码

请参见错误码。

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