Viewing Details of a Backend Server Group¶

Function¶

This API is used to view details of a backend server group.

URI¶

GET /v3/{project_id}/elb/pools/{pool_id}

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

Request Parameters¶

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

Response Parameters¶

Status code: 200

**Table 3** Response body parameters¶
Parameter	Type	Description
request_id	String	Specifies the request ID. The value is automatically generated.
pool	Pool object	Specifies the backend server group.

**Table 4** Pool¶
Parameter	Type	Description
admin_state_up	Boolean	Specifies the administrative status of the backend server group. The value can only be updated to true. This parameter is unsupported. Please do not use it. Default: true
description	String	Provides supplementary information about the backend server group.
healthmonitor_id	String	Specifies the ID of the health check configured for the backend server group.
id	String	Specifies the backend server group ID.
lb_algorithm	String	Specifies the load balancing algorithm used by the load balancer to route requests to backend servers in the backend server group. The value can be ROUND_ROBIN (weighted round robin), LEAST_CONNECTIONS (weighted least connections), or SOURCE_IP (source IP hash). When the value is SOURCE_IP, the weight parameter is invalid.
listeners	Array of ListenerRef objects	Lists the listeners associated with the backend server group.
loadbalancers	Array of LoadBalancerRef objects	Lists the IDs of load balancers associated with the backend server group. If only listener_id is specified during the creation of the backend server group, the ID of the loadbalancers parameter in the response is the ID of the load balancer to which the listener is added.
members	Array of MemberRef objects	Lists the backend servers in the backend server group.
name	String	Specifies the backend server group name.
project_id	String	Specifies the project ID.
protocol	String	Specifies the protocol used by the backend server group to receive requests. The protocol can be TCP, UDP, or HTTP. For UDP listeners, the protocol of the backend server group must be UDP. For TCP listeners, the protocol of the backend server group must be TCP. For HTTP or HTTPS listeners, the protocol of the backend server group must be HTTP.
session_persistence	SessionPersistence object	Specifies the sticky session.
ip_version	String	Specifies the IP version supported by the backend server group. The value can be dualstack, v4, or v6. When the protocol of the backend server group is TCP or UDP, ip_version is set to dualstack, indicating that both IPv4 and IPv6 are supported. When the protocol of the backend server group is HTTP, ip_version is set to v4. Default: dualstack
slow_start	SlowStart object	Specifies whether to enable slow start. After you enable slow start, new backend servers added to the backend server group are warmed up, and the number of requests they can receive increases linearly during the configured slow start duration. This parameter can be used when the protocol of the backend server group is HTTP or HTTPS. An error will be returned if the protocol is not HTTP or HTTPS. This parameter is unsupported. Please do not use it.

**Table 5** ListenerRef¶
Parameter	Type	Description
id	String	Specifies the listener ID.

**Table 6** LoadBalancerRef¶
Parameter	Type	Description
id	String	Specifies the load balancer ID.

**Table 7** MemberRef¶
Parameter	Type	Description
id	String	Specifies the backend server ID.

**Table 8** SessionPersistence¶
Parameter	Type	Description
cookie_name	String	Specifies the cookie name. This parameter is unsupported. Please do not use it. Minimum: 0 Maximum: 1024
type	String	Specifies the sticky session type. The value can be SOURCE_IP, HTTP_COOKIE, or APP_COOKIE. If the protocol of the backend server group is TCP or UDP, only SOURCE_IP takes effect. If the value is not SOURCE_IP, sticky sessions will not take effect. If the protocol of the backend server group is HTTP or HTTPS, the value can only be HTTP_COOKIE. APP_COOKIE is unsupported. Please do not use it.
persistence_timeout	Integer	Specifies the stickiness duration, in minutes. If the protocol of the backend server group is TCP or UDP, the value ranges from 1 to 60, and the default value is 1. If the protocol of the backend server group is HTTP or HTTPS, the value ranges from 1 to 1440, and the default value is 1440.

**Table 9** SlowStart¶
Parameter	Type	Description
enable	Boolean	Specifies whether to enable slow start. true indicates that this function is enabled, and false indicates this function is disabled. Default: false
duration	Integer	Specifies the slow start duration, in seconds. The value ranges from 30 to 1200, and the default value is 30. Minimum: 30 Maximum: 1200 Default: 30

Example Requests¶

GET

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

Example Responses¶

Status code: 200

Successful request.

{
  "pool" : {
    "lb_algorithm" : "LEAST_CONNECTIONS",
    "protocol" : "TCP",
    "description" : "My pool",
    "admin_state_up" : true,
    "loadbalancers" : [ {
      "id" : "098b2f68-af1c-41a9-8efd-69958722af62"
    } ],
    "project_id" : "99a3fff0d03c428eac3678da6a7d0f24",
    "session_persistence" : "",
    "healthmonitor_id" : "",
    "listeners" : [ {
      "id" : "0b11747a-b139-492f-9692-2df0b1c87193"
    }, {
      "id" : "61942790-2367-482a-8b0e-93840ea2a1c6"
    }, {
      "id" : "fd8f954c-f0f8-4d39-bb1d-41637cd6b1be"
    } ],
    "members" : [ ],
    "id" : "36ce7086-a496-4666-9064-5ba0e6840c75",
    "name" : "My pool.",
    "ip_version" : "dualstack"
  },
  "request_id" : "c1a60da2-1ec7-4a1c-b4cc-73e1a57b368e"
}

Status Codes¶

Status Code	Description
200	Successful request.

Error Codes¶

See Error Codes.

last updated: 2024-09-09 13:15 UTC - commit: d90fbcb73b5938b11dd6501ad717159984fc08ee