You can call this operation to remove backend servers.

<note>If the backend servers are not included in the server list of the specified SLB instance, they cannot be deleted and no error is returned. </note>

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes RemoveBackendServers

The operation that you want to perform.

Set the value to RemoveBackendServers.

BackendServers String Yes [{"ServerId":"i-2zej4lxhjoq***", "Type": "ecs","Weight":"100"}]

The backend servers to be removed. Valid values:

  • ServerId: The instance ID of a backend server that is an ECS instance ID. This parameter is required and must be set to a string.
  • Weight: The weight of the backend server. This parameter must be set to an integer. Valid values: 0 to 100.
  • Type: The type of the backend server. Valid values:
    • ecs: ECS instance. This is the default value.
    • eni: Elastic Network Interface (ENI).
Note You can add up to 20 backend servers in each call.

Examples:

  • Remove an ECS instance: [{"ServerId":"i-2zej4lxhjoq***", "Type": "ecs","Weight":"100"}].
  • Remove an ENI: [{"ServerId":"eni-2ze1sdp5***","Type": "eni","Weight":"100"}].
LoadBalancerId String Yes lb-bp1qjwo61pqz3ahl*****

The ID of the SLB instance.
RegionId String Yes cn-hangzhou

The region ID of the SLB instance.

Response parameters

Parameter Type Example Description
LoadBalancerId String lb-bp1vjkb671z53*******

The ID of the SLB instance.
BackendServers Array

The list of backend servers.

BackendServer
Description String Backend servers

The description of the backend server group.
ServerId String i-jjgjgjgggd******

The instance ID of the backend server.
Type String ecs

The type of the backend server. Valid values:

  • ecs: ECS instance. This is the default value.
  • eni: Elastic Network Interface (ENI).
Weight Integer 100

The weight of the backend server. Valid values: 0 to 100.

RequestId String 365F4154-92F6-4AE4-92F8-7FF34B540710

The ID of the request.

Examples

Sample requests

http(s)://[Endpoint]/? Action=RemoveBackendServers
&BackendServers=[{"ServerId":"i-2zej4lxhjoq***", "Type": "ecs","Weight":"100"}]
&LoadBalancerId=lb-bp1qjwo61pqz3ahl*****
&<Common request parameters>

Sample success responses

XML format 

<RemoveBackendServers>
  <RequestId>365F4154-92F6-4AE4-92F8-7FF34B540710</RequestId>
  <LoadBalancerId>lb-bp1vjkb671z53cy******</LoadBalancerId>
  <BackendServers>
        <BackendServer>
              <ServerId>i-jjgjgjg*****</ServerId>
              <Weight>100</Weight>
        </BackendServer>
        <BackendServer>
              <ServerId>i-jjgjgituitu****</ServerId>
              <Weight>100</Weight>
        </BackendServer>
  </BackendServers>
</RemoveBackendServers>

JSON format 

{
    "RequestId": "365F4154-92F6-4AE4-92F8-7FF34B540710", 
    "LoadBalancerId": "lb-bp1vjkb671z53cy******", 
    "BackendServers": {
        "BackendServer": [
            {
                "ServerId": "i-jjgjgjg*****", 
                "Weight": 100
            }, 
            {
                "ServerId": "i-jjgjgituitu****", 
                "Weight": 100
            }
        ]
    }
}

Error code

For a list of error codes, visit the API Error Center.