SetBackendServers - Developer Guide| Alibaba Cloud Documentation Center

Description

Set Backend Servers; set weight for the backend ECSs; return to the backend servers list for the Server Load Balancer instance.

Request parameter

Name	Type	Mandatory or not	Description
Action	String	Yes	Name of the operating interface, which is specified in the system. Value：SetBackendServers
LoadBalancerId	String	Yes	The unique ID of an Server Load Balancer instance
BackendServers	String	Yes	The backend servers list which need to be added. Value: a Json string，the structure is a JsonList。the number of backend servers contained in a list must be less than 20. The structure of the list elements is shown in the following table.

Backend server list(BackendServers)

Name	Type	Description
ServerId	String	Backend server ID (ECS instance ID)
Weight	Integer	Backend server Weight. Value: 0-100. Default: 100

Return parameter

Name	Type	Description
Common Parameter		See Common Parameter for details.
LoadBalancerId	String	The unique ID of an Server Load Balancer instance
BackendServers	List	Information of multiple backend servers in the Server Load Balancer instance is returned in the array format. See the following table for details.

Backend server information (BackendServers)

Name	Type	Description
ServerId	String	Backend server ID (ECS instance ID)
Weight	Integer	Backend server Weight. Value: 0-100

Example

Request example

https://slb.aliyuncs.com/
&Action=SetBackendServers
&LoadBalancerId=139a00604ad-cn-east-hangzhou-01
&BackendServers=[{"ServerId":"vm-233","Weight":"0"},{"ServerId":"vm-234","Weight":"0"}]
&<common request parameter>

Return example

XML format

  <?xml version="1.0" encoding="UTF-8"?>
  <AddBackendServersResponse>
  <RequestId>365F4154-92F6-4AE4-92F8-7FF34B540710</RequestId>
  <LoadBalancerId>139a00604ad-cn-east-hangzhou-01</LoadBalancerId>
  <BackendServers>
  <BackendServer>
  <ServerId>vm-233</ServerId>
  <Weight>0</Weight>
  </BackendServer>
  <BackendServer>
  <ServerId>vm-234</ServerId>
  <Weight>0</Weight>
  </BackendServer>
  </BackendServers>
  </AddBackendServersResponse>

JSON format

{
"RequestId":"365F4154-92F6-4AE4-92F8-7FF34B540710",
"LoadBalancerId":"139a00604ad-cn-east-hangzhou-01",
      "BackendServers":{
“BackendServer”: [
  {"ServerId":"vm-233",
      "Weight":0},
  {"ServerId":"vm-234",
      "Weight":0}] }
  }