This API is used to query the supported features of a gateway.

For details, see Calling APIs.

GET /v2/{project_id}/apigw/instances/{instance_id}/instance-features

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. For details about how to obtain it, see Obtaining a Project ID.
instance_id	Yes	String	Gateway ID, which can be obtained from the gateway information on the APIG console.

**Table 2** Query Parameters
Parameter	Mandatory	Type	Description
offset	No	Long	Offset from which the query starts. If the value is less than 0, it is automatically converted to 0. Default: 0
limit	No	Integer	Number of items displayed on each page. A value less than or equal to 0 will be automatically converted to 20, and a value greater than 500 will be automatically converted to 500. Minimum: 1 Maximum: 500 Default: 20

**Table 3** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is a token.

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.
features	Array of strings	Supported features: "resize_huge_flavor" "health_check_in_instance_etcd" "shubao_support_add_node" "upgrade_uninterrupted" "shubao_support_pp2" "shubao_support_full_pp2" "etcd_cert_update" "scc_material_update" Features not displayed in the list are not supported by the gateway.

Status code: 401

**Table 5** Response body parameters
Parameter	Type	Description
error_code	String	Error code.
error_msg	String	Error message.

Status code: 403

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

Status code: 500

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

None

Status code: 200

OK

{
  "total" : 3,
  "size" : 3,
  "features" : [ "health_check_in_instance_etcd", "shubao_support_add_node", "resize_huge_flavor" ]
}

Status code: 401

Unauthorized

{
  "error_code" : "APIC.7102",
  "error_msg" : "Incorrect token or token resolution failed"
}

Status code: 403

Forbidden

{
  "error_code" : "APIC.7106",
  "error_msg" : "No permissions to request for the method"
}

Status code: 500

Internal Server Error

{
  "error_code" : "APIC.9000",
  "error_msg" : "Failed to request internal service"
}

Querying the Supported Features of a Gateway