Help Center/ ROMA Connect/ API Reference/ Service Integration APIs/ VPC Channel Management/ Querying Backend Servers of a VPC Channel

Updated on 2025-07-18 GMT+08:00

Querying Backend Servers of a VPC Channel

Function

This API is used to query the backend servers of a VPC channel.

URI

GET /v2/{project_id}/apic/instances/{instance_id}/vpc-channels/{vpc_channel_id}/members

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. For details about how to obtain the project ID, see Appendix > Obtaining a Project ID in the ROMA Connect API Reference.
instance_id	Yes	String	Instance ID.
vpc_channel_id	Yes	String	VPC channel ID.

**Table 2** Query Parameters
Parameter	Mandatory	Type	Description
offset	No	Long	Offset from which the query starts. If the offset is less than 0, the value is automatically converted to 0.
limit	No	Integer	Number of items displayed on each page.
name	No	String	Cloud server name.
member_group_name	No	String	Name of the backend server group.
member_group_id	No	String	ID of the backend server group.
precise_search	No	String	Parameter name for exact matching. If multiple parameters need to support exact match, separate them with commas (,). Currently, name and member_group_name are supported.

Request Parameters

**Table 3** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token, which can be obtained by calling the IAM API (value of X-Subject-Token in the response header).

Response Parameters

Status code: 200

**Table 4** Response body parameters
Parameter	Type	Description
size	Integer	Length of the returned resource list.
total	Long	Number of resources that match the query conditions.
members	Array of VpcMemberInfo objects	Backend server group ID.

**Table 5** VpcMemberInfo
Parameter	Type	Description
host	String	Backend server address. This parameter is valid when the member type is IP address.
weight	Integer	Backend server weight. The higher the weight is, the more requests a cloud server will receive. It is valid only when the VPC channel type is set to 2.
is_backup	Boolean	Indicates whether it is a standby node. After this parameter is enabled, the corresponding backend service functions as the standby node and works only when all non-standby nodes are faulty. The instance must be upgraded to the corresponding version to support this function. If the instance does not support this function, contact technical support.
member_group_name	String	Name of the backend server group. Select a server group for the backend service address so that the backend addresses of the corresponding server group can be changed in a unified manner.
status	Integer	Backend server status. 1: available 2: unavailable
port	Integer	Backend server port.
ecs_id	String	Backend ECS ID This parameter is mandatory when the backend instance type is ECS. It can include letters, digits, hyphens (-), and underscores (_) (max. 64 characters).
ecs_name	String	Backend ECS name This parameter is mandatory when the backend instance type is ECS. It can include letters, digits, hyphens (-), underscores (_), and periods (.) (max. 64 characters).
id	String	VPC channel list.
vpc_channel_id	String	Backend instance ID.
create_time	String	VPC channel ID.
member_group_id	String	Time when the backend server is added to the VPC channel.
health_status	String	Health status of the backend instance of the load balance channel. The value can be unknown, healthy, or unhealthy, indicating that no health check is performed, healthy, or unhealthy, respectively.

Status code: 400

**Table 6** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error description.

Status code: 401

**Table 7** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error description.

Status code: 403

**Table 8** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error description.

Status code: 404

**Table 9** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error description.

Status code: 500

**Table 10** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error description.

Example Requests

None

Example Responses

Status code: 200

{
  "total" : 2,
  "size" : 2,
  "members" : [ {
    "host" : "192.168.0.5",
    "weight" : 1,
    "is_backup" : false,
    "member_group_name" : "",
    "status" : 1,
    "port" : 22,
    "ecs_id" : "192.168.0.5",
    "ecs_name" : "192.168.0.5",
    "id" : "be63c6260a1043888187f84af39c9f0e",
    "vpc_channel_id" : "56a7d7358e1b42459c9d730d65b14e59",
    "create_time" : "2020-07-23T07:11:57Z",
    "health_status" : "unhealthy",
    "member_group_id" : ""
  }, {
    "host" : "192.168.1.124",
    "weight" : 2,
    "is_backup" : false,
    "member_group_name" : "",
    "status" : 1,
    "port" : 22,
    "ecs_id" : "192.168.1.124",
    "ecs_name" : "192.168.1.124",
    "id" : "a57b13f1b89b417ca8acd76909e6df67",
    "vpc_channel_id" : "56a7d7358e1b42459c9d730d65b14e59",
    "create_time" : "2020-07-23T07:11:57Z",
    "member_group_id" : "",
    "health_status" : "unhealthy"
  } ]
}

Status code: 400

Bad Request

{
  "error_code" : "APIG.2012",
  "error_msg" : "Invalid parameter value,parameterName:name. Please refer to the support documentation"
}

Status code: 401

Unauthorized

{
  "error_code" : "APIG.1002",
  "error_msg" : "Incorrect token or token resolution failed"
}

Status code: 403

Forbidden

{
  "error_code" : "APIG.1005",
  "error_msg" : "No permissions to request this method"
}

Status code: 404

Not Found

{
  "error_code" : "APIG.3023",
  "error_msg" : "The VPC channel does not exist,id:56a7d7358e1b42459c9d730d65b14e59"
}

Status code: 500

Internal Server Error

{
  "error_code" : "APIG.9999",
  "error_msg" : "System error"
}

Status Codes

Status Code	Description
200	OK
400	Bad Request
401	Unauthorized
403	Forbidden
404	Not Found
500	Internal Server Error

Error Codes

See Error Codes.

Parent topic: VPC Channel Management

Previous topic: Adding or Updating Backend Instances

Next topic: Updating Backend Instances

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