Updating a Backend Server¶

Function¶

The backend server can be updated only when the provisioning status of the associated load balancer is ACTIVE.

URI¶

PUT /v3/{project_id}/elb/pools/{pool_id}/members/{member_id}

**Table 1** Path Parameters¶
Parameter	Mandatory	Type	Description
member_id	Yes	String	Specifies the backend server ID.
pool_id	Yes	String	Specifies the ID of the backend server group.
project_id	Yes	String	Specifies the project ID.

Request Parameters¶

**Table 2** Request header parameters¶
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	Specifies the token used for IAM authentication.

**Table 3** Request body parameters¶
Parameter	Mandatory	Type	Description
member	Yes	UpdateMemberOption object	Specifies request parameters for updating a backend server.

**Table 4** UpdateMemberOption¶
Parameter	Mandatory	Type	Description
admin_state_up	No	Boolean	Specifies the administrative status of the backend server. Although this parameter can be used in the APIs for creating and updating backend servers, its actual value depends on whether cloud servers exist. If cloud servers exist, the value is true. Otherwise, the value is false.
name	No	String	Specifies the backend server name. Minimum: 0 Maximum: 255
weight	No	Integer	Specifies the weight of the backend server. Requests are routed to backend servers in the same backend server group based on their weights. If the weight is 0, the backend server will not accept new requests. This parameter is invalid when lb_algorithm is set to SOURCE_IP for the backend server group that contains the backend server. Minimum: 0 Maximum: 100 Default: 1

Response Parameters¶

Status code: 200

**Table 5** Response body parameters¶
Parameter	Type	Description
request_id	String	Specifies the request ID. The value is automatically generated.
member	Member object	Specifies the backend server.

**Table 6** Member¶
Parameter	Type	Description
address	String	Specifies the IP address of the backend server. The IP address must be in the subnet specified by subnet_cidr_id, for example, 192.168.3.11. The IP address can only be the IP address of the primary NIC.
admin_state_up	Boolean	Specifies the administrative status of the backend server. Although this parameter can be used in the APIs for creating and updating backend servers, its actual value depends on whether cloud servers exist. If cloud servers exist, the value is true. Otherwise, the value is false. Default: true
id	String	Specifies the backend server ID.
name	String	Specifies the backend server name.
operating_status	String	Specifies the operating status of the backend server. The value can be one of the following: ONLINE: The backend server is running normally. NO_MONITOR: No health check is configured for the backend server group to which the backend server belongs. OFFLINE: The cloud server used as the backend server is stopped or does not exist.
project_id	String	Specifies the project ID.
protocol_port	Integer	Specifies the port used by the backend server to receive requests. Minimum: 1 Maximum: 65535
subnet_cidr_id	String	Specifies the ID of the subnet where the backend server works. This subnet must be in the VPC as the subnet of the load balancer associated with the backend server. Only IPv4 subnets are supported. If the value is left blank, the backend server is not in the load balancer's VPC.
weight	Integer	Specifies the weight of the backend server. Requests are routed to backend servers in the same backend server group based on their weights. If the weight is 0, the backend server will not accept new requests. This parameter is invalid when lb_algorithm is set to SOURCE_IP for the backend server group that contains the backend server. Minimum: 0 Maximum: 100 Default: 1
ip_version	String	This is a read-only attribute, which is automatically generated based on the address parameter. The value can be v4 or v6. Default: v4

Example Requests¶

PUT

https://{elb_endpoint}/v3/9a3fff0d03c428eac3678da6a7d0f24/elb/pools/36ce7086-a496-4666-9064-5ba0e6840c75/members/1923923e-fe8a-484f-bdbc-e11559b1f48f

{
  "member" : {
    "name" : "My member",
    "weight" : 10
  }
}

Example Responses¶

Status code: 200

Successful request.

{
  "member" : {
    "name" : "My member",
    "weight" : 10,
    "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",
    "ip_version" : "v4"
  },
  "request_id" : "e7b569d4-15ad-494d-9dd9-8cd740eef8f6"
}

Status Codes¶

Status Code	Description
200	Successful request.

Error Codes¶

See Error Codes.

last updated: 2023-03-02 13:42