Removing a Load Balancer from AZs

Function

This API is used to remove a load balancer from one or more AZs where it is working.

Removing a load balancer from an AZ may disconnect existing connections.

Constraints

This API is only available for dedicated load balancers.
You cannot remove a load balancer from all AZs where it is working.

Calling Method

For details, see Calling APIs.

URI

POST /v3/{project_id}/elb/loadbalancers/{loadbalancer_id}/availability-zone/batch-remove

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Definition: Specifies the project ID. For details about how to obtain a project ID, see Obtaining a Project ID. Constraints: N/A Range: The value can contain a maximum of 32 characters, including digits and lowercase letters. Default value: N/A
loadbalancer_id	Yes	String	Definition: Specifies the load balancer ID. Constraints: N/A Range: N/A Default value: N/A

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	No	String	Definition: Specifies the token used for IAM authentication. Constraints: N/A Range: N/A Default value: N/A

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
availability_zone_list	Yes	Array of strings	Definition: Specifies the AZs where the load balancer will be removed. Constraints: N/A Range: N/A Default value: N/A

Response Parameters

Status code: 200

**Table 4** Response body parameters
Parameter	Type	Description
loadbalancer	LoadBalancer object	Definition: Specifies the load balancer.
request_id	String	Definition: Specifies the request ID. Range: The value is automatically generated, and can contain characters including digits, lowercase letters, and hyphens (-).

**Table 5** LoadBalancer
Parameter	Type	Description
id	String	Definition: Specifies the load balancer ID. Range: N/A
description	String	Definition: Provides supplementary information about the load balancer. Range: N/A
provisioning_status	String	Definition: Specifies the provisioning status of the load balancer. Range: ACTIVE: in use PENDING_DELETE: deleting
admin_state_up	Boolean	Definition: Specifies whether the load balancer is enabled. Range: true: enabled false: disabled
provider	String	Definition: Specifies the provider of the load balancer. The value is fixed to vlb. Range: N/A
pools	Array of PoolRef objects	Definition: Lists the IDs of backend server groups associated with the load balancer.
listeners	Array of ListenerRef objects	Definition: Lists the IDs of listeners associated with the load balancer.
operating_status	String	Definition: Specifies the operating status of the load balancer. Range: ONLINE: The load balancer is online. FROZEN: The load balancer is frozen.
name	String	Definition: Specifies the load balancer name. Range: N/A
project_id	String	Definition: Specifies the ID of the project where the load balancer is used. Range: N/A
vip_subnet_cidr_id	String	Definition: Specifies the ID of the IPv4 subnet where the load balancer is located. This subnet is also called the frontend subnet. Range: N/A
vip_address	String	Definition: Specifies the private IPv4 address of the load balancer. Range: N/A
vip_port_id	String	Definition: Specifies the ID of the port bound to the private IPv4 address of the load balancer. Range: N/A
tags	Array of Tag objects	Definition: Specifies the tags added to the load balancer.
created_at	String	Definition: Specifies the time when the load balancer was created. Range: The value must be in the format of yyyy-MM-dd'T'HH:mm:ss'Z'.
updated_at	String	Definition: Specifies the time when the load balancer was updated. Range: The value must be in the format of yyyy-MM-dd'T'HH:mm:ss'Z'.
guaranteed	Boolean	Definition: Specifies whether the load balancer is a dedicated load balancer. Range: false: The load balancer is a shared load balancer. true: The load balancer is a dedicated load balancer.
vpc_id	String	Definition: Specifies the ID of the VPC where the load balancer is located. Range: N/A
eips	Array of EipInfo objects	Definition: Specifies the EIP bound to the load balancer. NOTE: This parameter has the same meaning as publicips.
ipv6_vip_address	String	Definition: Specifies the IPv6 address of the load balancer. Range: N/A
ipv6_vip_virsubnet_id	String	Definition: Specifies the ID of the IPv6 subnet where the load balancer is located. This subnet is also called the frontend subnet. Range: N/A
ipv6_vip_port_id	String	Definition: Specifies the ID of the port bound to the IPv6 address of the load balancer. Range: N/A
availability_zone_list	Array of strings	Definition: Specifies the list of AZs where the load balancers are created. Range: N/A
enterprise_project_id	String	Definition: Specifies the ID of the enterprise project. Range: 0: The resource belongs to the default enterprise project. A string in UUID format indicates a non-default enterprise project.
billing_info	String	Definition: Provides resource billing information. Range: If the value is left blank, the resource is billed on a pay-per-use basis. This parameter is unsupported. Please do not use it.
l4_flavor_id	String	Definition: Specifies the ID of a flavor at Layer 4. If the current load balancer is an elastic flavor instance, this parameter defines the maximum elastic flavor at Layer 4. Range: N/A
l4_scale_flavor_id	String	Definition: Specifies the ID of an elastic flavor at Layer 4. Range: N/A NOTE: This parameter has been discarded. Do not use it.
l7_flavor_id	String	Definition: Specifies the ID of a flavor at Layer 7. If the current load balancer is an elastic flavor instance, this parameter defines the maximum elastic flavor at Layer 7. Range: N/A
l7_scale_flavor_id	String	Definition: Specifies the ID of an elastic flavor at Layer 7. Range: N/A NOTE: This parameter has been discarded. Do not use it.
gw_flavor_id	String	Definition: Specifies the flavor ID of the gateway load balancer. Range: N/A This parameter is unsupported. Please do not use it.
loadbalancer_type	String	Definition: Specifies the load balancer type. Range: gateway: gateway load balancers null: other types of load balancers This parameter is unsupported. Please do not use it.
publicips	Array of PublicIpInfo objects	Definition: Specifies the EIP bound to the load balancer. NOTE: This parameter has the same meaning as eips.
global_eips	Array of GlobalEipInfo objects	Definition: Specifies the global EIP bound to the load balancer.
elb_virsubnet_ids	Array of strings	Definition: Specifies the network IDs of subnets on the downstream plane. Range: N/A
elb_virsubnet_type	String	Definition: Specifies the type of the subnet on the downstream plane. Range: ipv4: IPv4 subnets dualstack: subnets that support IPv4/IPv6 dual stack
ip_target_enable	Boolean	Definition: Specifies whether to add backend servers that are not in the load balancer's VPC. If you set it to true, you can associate servers in a VPC connected through a VPC peering connection, in a VPC connected through a cloud connection, or in an on-premises data center at the other end of a Direct Connect or VPN connection, by using server IP addresses. Range: true: This option will be enabled. false: This option will be disabled.
frozen_scene	String	Definition: Specifies the scenario where the load balancer is frozen. If there are multiple scenarios, separate them with commas (,). Range: POLICE: The load balancer is frozen due to security reasons. ILLEGAL: The load balancer is frozen due to violation of laws and regulations. VERIFY: Your account has not completed real-name authentication. PARTNER: The load balancer is frozen by the partner. AREAR: The load balancer is frozen due to arrears.
deletion_protection_enable	Boolean	Definition: Specifies whether to enable deletion protection. This parameter is returned only when the deletion protection is enabled in the current region. Range: false: This option will be disabled. true: This option will be enabled.
autoscaling	AutoscalingRef object	Definition: Specifies information about elastic scaling. If elastic scaling is enabled, the load balancer flavors can be automatically adjusted based on incoming traffic. NOTE: This parameter has been deprecated, but is retained for compatibility purposes. Using this parameter is not recommended. If this parameter is specified, the load balancer with minimum flavors will be created and you will be billed for the minimum flavors.
public_border_group	String	Definition: Specifies the public border group. Range: center: public border group of the central site Edge site name: public border group of an edge site
charge_mode	String	Definition: Specifies the charge mode of the load balancer. Range: flavor: billed by the fixed flavor you select. lcu: billed by how many LCUs you have used. Null: If it is a shared load balancer, it is free. If it is a dedicated load balancer, it will be billed by the fixed flavor you select. This parameter is unsupported. Please do not use it.
service_lb_mode	String	Definition: Specifies load balancer mode. Range: lb: Cross-tenant access is not supported. ep: Cross-tenant access is supported. This parameter is unsupported. Please do not use it.
instance_type	String	Definition: Specifies the internal service to which the load balancer belongs. Range: N/A This parameter is unsupported. Please do not use it.
instance_id	String	Definition: Specifies the ID of the instance with which the load balancer is associated. Range: N/A This parameter is unsupported. Please do not use it.
proxy_protocol_extensions	Array of ProxyProtocolExtension objects	Definition: Specifies the proxy protocol extension. This parameter is unsupported. Please do not use it.
waf_failure_action	String	Definition: Specifies traffic distributing policies when the WAF is faulty. Range: discard indicates traffic will not be distributed. forward indicates traffic will be distributed to the default backend servers.
protection_status	String	Definition: Specifies the protection status. Range: nonProtection: The resource is not protected. consoleProtection: Modification is not allowed on the console.
protection_reason	String	Definition: Specifies why modification protection is enabled. Range: The value can contain a maximum of 255 Unicode characters, excluding angle brackets (<>).
log_group_id	String	Definition: Specifies the ID of the log group that is associated with the load balancer. Range: N/A
log_topic_id	String	Definition: Specifies the ID of the log topic that is associated with the load balancer. Range: N/A
custom_qos_limit	CustomQosLimit object	Definition: Specifies the rate limit information of the ELB flavors. Range: N/A This parameter is unsupported. Please do not use it.

**Table 6** PoolRef
Parameter	Type	Description
id	String	Definition: Specifies the backend server group ID. Range: N/A

**Table 7** ListenerRef
Parameter	Type	Description
id	String	Definition: Specifies the listener ID. Range: N/A

**Table 8** Tag
Parameter	Type	Description
key	String	Definition: Specifies the tag key. Range: N/A
value	String	Definition: Specifies the tag value. Range: N/A

**Table 9** EipInfo
Parameter	Type	Description
eip_id	String	Definition: Specifies the EIP ID. Range: N/A
eip_address	String	Definition: Specifies the EIP. Range: N/A
ip_version	Integer	Definition: Specifies the IP address version. Range: 4: IPv4 addresses 6: IPv6 addresses

**Table 10** PublicIpInfo
Parameter	Type	Description
publicip_id	String	Definition: Specifies the EIP ID. Range: N/A
publicip_address	String	Definition: Specifies the EIP. Range: N/A
ip_version	Integer	Definition: Specifies the IP address version. Range: 4: IPv4 address 6: IPv6 address

**Table 11** GlobalEipInfo
Parameter	Type	Description
global_eip_id	String	Definition: Specifies the ID of the global EIP. Range: N/A
global_eip_address	String	Definition: Specifies the global EIP. Range: N/A
ip_version	Integer	Definition: Specifies the IP address version. Range: 4: IPv4 addresses 6: IPv6 addresses

**Table 12** AutoscalingRef
Parameter	Type	Description
enable	Boolean	Definition: Specifies whether to enable elastic scaling for the load balancer. Range: true: This option will be enabled. false: This option will be disabled.
min_l7_flavor_id	String	Definition: Specifies the ID of the minimum elastic flavor at Layer 7. Range: N/A

**Table 13** ProxyProtocolExtension
Parameter	Type	Description
vip_address	String	Definition: Specifies the IPv4 address. Constraints: N/A Range: N/A Default value: N/A
ipv6_vip_address	String	Definition: Specifies the IPv6 address. Constraints: N/A Range: N/A Default value: N/A
extension	Extension object	Definition: Specifies the proxy protocol extension. Constraints: N/A

**Table 14** Extension
Parameter	Type	Description
ep_id	String	Definition: Specifies the VPC endpoint ID. Constraints: N/A Range: N/A Default value: N/A
ep_service_id	String	Definition: Specifies the VPC endpoint service ID. Constraints: N/A Range: N/A Default value: N/A

**Table 15** CustomQosLimit
Parameter	Type	Description
l4	L4Limit object	Definition: Specifies the rate limit information of the ELB flavors at Layer 4.
l7	L7Limit object	Definition: Specifies the rate limit information of the ELB flavors at Layer 7.

**Table 16** L4Limit
Parameter	Type	Description
connection	Integer	Definition: Specifies the maximum number of concurrent connections at Layer 4. Range: N/A
cps	Integer	Definition: Specifies the maximum number of new connections at Layer 4. Range: N/A

**Table 17** L7Limit
Parameter	Type	Description
connection	Integer	Definition: Specifies the maximum number of concurrent connections at Layer 7. Range: N/A
cps	Integer	Definition: Specifies the maximum number of new connections at Layer 7. Range: N/A

Example Requests

Removing a load balancer from AZs

POST https://{ELB_Endpoint}/v3/060576782980d5762f9ec014dd2f1148/elb/loadbalancers/9b663cd9-61e4-483d-b91f-92fc337fecec/availability-zone/batch-remove

{
  "availability_zone_list" : [ "az2", "az3" ]
}

Example Responses

Status code: 200

Successful request.

{
  "request_id" : "6c63d0ac-7beb-451d-a3e0-a066beaea316",
  "loadbalancer" : {
    "id" : "9b663cd9-61e4-483d-b91f-92fc337fecec",
    "project_id" : "060576782980d5762f9ec014dd2f1148",
    "name" : "elb-reset",
    "description" : "",
    "vip_port_id" : null,
    "vip_address" : null,
    "admin_state_up" : true,
    "provisioning_status" : "ACTIVE",
    "operating_status" : "ONLINE",
    "listeners" : [ ],
    "pools" : [ ],
    "tags" : [ ],
    "provider" : "vlb",
    "created_at" : "2021-07-26T02:46:31Z",
    "updated_at" : "2021-07-26T02:46:59Z",
    "vpc_id" : "59cb11ef-f185-49ba-92af-0539e8ff9734",
    "enterprise_project_id" : "0",
    "availability_zone_list" : [ "az1" ],
    "ipv6_vip_address" : null,
    "ipv6_vip_virsubnet_id" : null,
    "ipv6_vip_port_id" : null,
    "publicips" : [ {
      "publicip_id" : "0c07e04d-e2f9-41ad-b934-f58a65b6734d",
      "publicip_address" : "97.97.2.171",
      "ip_version" : 4
    } ],
    "elb_virsubnet_ids" : [ "7f817f9c-8731-4002-9e47-18cb8d431787" ],
    "elb_virsubnet_type" : "dualstack",
    "ip_target_enable" : false,
    "autoscaling" : {
      "enable" : false,
      "min_l7_flavor_id" : ""
    },
    "frozen_scene" : null,
    "eips" : [ {
      "eip_id" : "0c07e04d-e2f9-41ad-b934-f58a65b6734d",
      "eip_address" : "97.97.2.171",
      "ip_version" : 4
    } ],
    "guaranteed" : true,
    "billing_info" : null,
    "l4_flavor_id" : "636ba721-935a-4ca5-a685-8076ce0e4148",
    "l4_scale_flavor_id" : null,
    "l7_flavor_id" : null,
    "l7_scale_flavor_id" : null,
    "vip_subnet_cidr_id" : null,
    "public_border_group" : "center",
    "protection_status" : "nonProtection",
    "protection_reason" : ""
  }
}

SDK Sample Code

The SDK sample code is as follows.

Removing a load balancer from AZs

      
       
         
         
           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.*;

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

public class BatchRemoveAvailableZonesSolution {

    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();
        BatchRemoveAvailableZonesRequest request = new BatchRemoveAvailableZonesRequest();
        request.withLoadbalancerId("{loadbalancer_id}");
        BatchRemoveAvailableZonesRequestBody body = new BatchRemoveAvailableZonesRequestBody();
        List<String> listbodyAvailabilityZoneList = new ArrayList<>();
        listbodyAvailabilityZoneList.add("az2");
        listbodyAvailabilityZoneList.add("az3");
        body.withAvailabilityZoneList(listbodyAvailabilityZoneList);
        request.withBody(body);
        try {
            BatchRemoveAvailableZonesResponse response = client.batchRemoveAvailableZones(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());
        }
    }
}

          

        

      
     

Removing a load balancer from AZs

      
       
         
         
           # 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 = BatchRemoveAvailableZonesRequest()
        request.loadbalancer_id = "{loadbalancer_id}"
        listAvailabilityZoneListbody = [
            "az2",
            "az3"
        ]
        request.body = BatchRemoveAvailableZonesRequestBody(
            availability_zone_list=listAvailabilityZoneListbody
        )
        response = client.batch_remove_available_zones(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

          

        

      
     

Removing a load balancer from AZs

      
       
         
         
           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.BatchRemoveAvailableZonesRequest{}
	request.LoadbalancerId = "{loadbalancer_id}"
	var listAvailabilityZoneListbody = []string{
        "az2",
	    "az3",
    }
	request.Body = &model.BatchRemoveAvailableZonesRequestBody{
		AvailabilityZoneList: listAvailabilityZoneListbody,
	}
	response, err := client.BatchRemoveAvailableZones(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

          

        

      
     