Help Center/ Elastic Load Balance/ API Reference/ APIs (V3)/ Health Check/ Viewing Details of a Health Check
Updated on 2024-08-19 GMT+08:00

Viewing Details of a Health Check

Function

This API is used to view details of a health check.

Calling Method

For details, see Calling APIs.

URI

GET /v3/{project_id}/elb/healthmonitors/{healthmonitor_id}

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Specifies the project ID.

healthmonitor_id

Yes

String

Specifies the health check ID.

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.

healthmonitor

HealthMonitor object

Specifies the health check.

Table 4 HealthMonitor

Parameter

Type

Description

admin_state_up

Boolean

Specifies the administrative status of the health check.

  • true(default) indicates that the health check is enabled.

  • false indicates that the health check is disabled.

delay

Integer

Specifies the interval between health checks, in seconds. The value ranges from 1 to 50.

Minimum: 1

Maximum: 50

domain_name

String

Specifies the domain name that HTTP requests are sent to during the health check.

The value can contain only digits, letters, hyphens (-), and periods (.) and must start with a digit or letter.

The value is left blank by default, indicating that the virtual IP address of the load balancer is used as the destination address of HTTP requests.

This parameter is available only when type is set to HTTP.

expected_codes

String

Specifies the expected HTTP status code. This parameter will take effect only when type is set to HTTP, HTTPS or gRPC.

The value options are as follows:

  • A specific value, for example, 200

  • A list of values that are separated with commas (,), for example, 200, 202

  • A value range, for example, 200-204

If type is set to gRPC, the default value is 0. If type is set to other protocols, the default value is 200.

http_method

String

Specifies the HTTP method. The value can be GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, CONNECT, or PATCH. The default value is GET.

This parameter is available when type is set to HTTP or HTTPS.

This parameter is unsupported. Please do not use it.

id

String

Specifies the health check ID.

max_retries

Integer

Specifies the number of consecutive health checks when the health check result of a backend server changes from OFFLINE to ONLINE.

The value ranges from 1 to 10

Minimum: 1

Maximum: 10

max_retries_down

Integer

Specifies the number of consecutive health checks when the health check result of a backend server changes from ONLINE to OFFLINE.

The value ranges from 1 to 10, and the default value is 3.

Minimum: 1

Maximum: 10

monitor_port

Integer

Specifies the port used for the health check. This parameter is left blank by default, indicating that a port of the backend server will be used by default. The port number ranges from 1 to 65535. If the backend server group protocol is IP, monitor_port cannot be 0.

Minimum: 1

Maximum: 65535

name

String

Specifies the health check name.

pools

Array of PoolRef objects

Lists the IDs of backend server groups for which the health check is configured. Only one ID will be returned.

project_id

String

Specifies the project ID.

timeout

Integer

Specifies the maximum time required for waiting for a response from the health check, in seconds. It is recommended that you set the value less than that of parameter delay.

Minimum: 1

Maximum: 50

type

String

Specifies the health check protocol. The value can be TCP, UDP_CONNECT, HTTP, HTTPS, gRPC or TLS.

Note:

  • If the protocol of the backend server is QUIC, the value can only be UDP_CONNECT.

  • If the protocol of the backend server is UDP, the value can only be UDP_CONNECT.

  • If the protocol of the backend server is TCP, the value can only be TCP, HTTP or HTTPS.

  • If the protocol of the backend server is IP, the value can only be TCP, HTTP, or HTTPS.

  • If the protocol of the backend server is HTTP, the value can only be TCP, HTTP, HTTPS, gRPC, or TLS.

  • If the protocol of the backend server is HTTPS, the value can only be TCP, HTTP, HTTPS, gRPC, or TLS.

  • If the protocol of the backend server is gRPC, the value can only be TCP, HTTP, HTTPS, gRPC, or TLS.

  • If the protocol of the backend server is TLS, the value can only be TCP, HTTP, HTTPS, gRPC, or TLS.

QUIC protocol is not supported.

url_path

String

Specifies the HTTP request path for the health check. The value must start with a slash (/), and the default value is /. The value can contain letters, digits, hyphens (-), slashes (/), periods (.), percentage signs (%), question marks (?), pound signs (#), ampersand signs (&), and the extended character set _;~!()*[]@$^:',+.

Note: This parameter is available only when type is set to HTTP or HTTPS.

created_at

String

Specifies the time when the health check was configured. The format is yyyy-MM-dd'T'HH:mm:ss'Z' (UTC time).

updated_at

String

Specifies the time when the health check was updated. The format is yyyy-MM-dd'T'HH:mm:ss'Z' (UTC time).

Table 5 PoolRef

Parameter

Type

Description

id

String

Specifies the ID of the backend server group.

Example Requests

Querying details of a health check

GET https://{ELB_Endpoint}/v3/99a3fff0d03c428eac3678da6a7d0f24/elb/healthmonitors/c2b210b2-60c4-449d-91e2-9e9ea1dd7441

Example Responses

Status code: 200

Successful request.

{
  "healthmonitor" : {
    "monitor_port" : null,
    "id" : "c2b210b2-60c4-449d-91e2-9e9ea1dd7441",
    "project_id" : "99a3fff0d03c428eac3678da6a7d0f24",
    "domain_name" : null,
    "name" : "My Healthmonitor update",
    "delay" : 10,
    "max_retries" : 10,
    "pools" : [ {
      "id" : "488acc50-6bcf-423d-8f0a-0f4184f5b8a0"
    } ],
    "admin_state_up" : true,
    "timeout" : 30,
    "type" : "HTTP",
    "expected_codes" : "200",
    "url_path" : "/",
    "http_method" : "GET"
  },
  "request_id" : "3702e8f0-f5f0-4d35-9097-fc7160005fae"
}

Status Codes

Status Code

Description

200

Successful request.

Error Codes

See Error Codes.