Querying Health Checks

Function

This API is used to query the health checks. Filter query and pagination query are supported. Unless otherwise specified, exact match is applied.

URI

GET /v2.0/lbaas/healthmonitors

Constraints

Parameters marker, limit, and page_reverse are used for pagination query. Parameters marker and page_reverse take effect only when they are used together with parameter limit.

Request

**Table 1** Parameter description
Parameter	Mandatory	Type	Description
marker	No	String	Specifies the ID of the health check from which pagination query starts, that is, the ID of the last health check on the previous page. This parameter must be used together with limit.
limit	No	Integer	Specifies the number of health checks on each page. If this parameter is not set, all health checks are queried by default.
page_reverse	No	Boolean	Specifies the page direction. The value can be true or false, and the default value is false. The last page in the list requested with page_reverse set to false will not contain the "next" link, and the last page in the list requested with page_reverse set to true will not contain the "previous" link. This parameter must be used together with limit.
id	No	String	Specifies the health check ID.
tenant_id	No	String	Specifies the ID of the project where the health check is performed. The value contains a maximum of 255 characters.
name	No	String	Specifies the health check name. The value contains a maximum of 255 characters.
delay	No	Integer	Specifies the maximum time between health checks in the unit of second. The value ranges from 1 to 50.
max_retries	No	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.
max_retries_down	No	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.
admin_state_up	No	Boolean	Specifies the administrative status of the health check. This parameter is reserved, and the default value is true.
timeout	No	Integer	Specifies the health check timeout duration in the unit of second. The value ranges from 1 to 50. NOTE: You are advised to set the value less than that of parameter delay.
type	No	String	Specifies the health check protocol. The value can be TCP, UDP_CONNECT, or HTTP.
monitor_port	No	Integer	Specifies the port used for the health check. The value is left blank by default, indicating that the port of the backend server is used as the health check port.
expected_codes	No	String	Specifies the expected HTTP status code. The following options are available: A single value, such as 200 A list of values, such as 200,202 A value range, such as 200–204 This parameter is valid only when the value of type is set to HTTP. The value contains a maximum of 64 characters. NOTE: This parameter is reserved.
domain_name	No	String	Specifies the domain name of HTTP requests during the health check. This parameter is valid only when the value of type is set to HTTP. The value is left blank by default, indicating that the private IP address of the load balancer is used as the destination address of HTTP requests. The value can contain only digits, letters, hyphens (-), and periods (.) and must start with a digit or letter, for example, www.test.com. The value contains a maximum of 100 characters.
url_path	No	String	Specifies the HTTP request path for the health check. The default value is /, and the value must start with a slash (/). This parameter is valid only when the value of type is set to HTTP. An example value is /test. The value contains a maximum of 255 characters.
http_method	No	String	Specifies the HTTP request method. The default value is GET. The value can be GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, CONNECT, or PATCH. This parameter is valid only when the value of type is set to HTTP. NOTE: This parameter is reserved.

Response

**Table 2** Response parameters
Parameter	Type	Description
healthmonitors	Array	Lists the health checks. For details, see Table 3.
healthmonitors_links	Array	Provides links to the previous or next page during pagination query, respectively. This parameter exists only in the response body of pagination query. For details, see Table 5.

**Table 3** **healthmonitors** parameter description
Parameter	Type	Description
id	String	Specifies the health check ID.
tenant_id	String	Specifies the ID of the project where the health check is performed.
name	String	Specifies the health check name. The value contains a maximum of 255 characters.
delay	Integer	Specifies the maximum time between health checks in the unit of second. The value ranges from 1 to 50.
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.
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.
pools	Array	Lists the IDs of backend server groups associated with the health check.
admin_state_up	Boolean	Specifies the administrative status of the health check. This parameter is reserved. The value can be true or false. true: Enabled false: Disabled
timeout	Integer	Specifies the health check timeout duration in the unit of second. The value ranges from 1 to 50. NOTE: You are advised to set the value less than that of parameter delay.
type	String	Specifies the health check protocol. The value can be TCP, UDP_CONNECT, or HTTP.
monitor_port	Integer	Specifies the health check port. The port number ranges from 1 to 65535. The value is left blank by default, indicating that the port of the backend server is used as the health check port.
expected_codes	String	Specifies the expected HTTP status code. The following options are available: A single value, such as 200 A list of values, such as 200,202 A value range, such as 200–204 This parameter is valid only when the value of type is set to HTTP. The value contains a maximum of 64 characters.
domain_name	String	Specifies the domain name of HTTP requests during the health check. This parameter is valid only when the value of type is set to HTTP. The value is left blank by default, indicating that the private IP address of the load balancer is used as the destination address of HTTP requests. The value can contain only digits, letters, hyphens (-), and periods (.) and must start with a digit or letter, for example, www.test.com. The value contains a maximum of 100 characters.
url_path	String	Specifies the HTTP request path for the health check. The default value is /, and the value must start with a slash (/). This parameter is valid only when the value of type is set to HTTP. An example value is /test. The value contains a maximum of 255 characters.
http_method	String	Specifies the HTTP request method. The default value is GET. The value can be GET, HEAD, POST, PUT, DELETE, TRACE, OPTIONS, CONNECT, or PATCH. This parameter is valid only when the value of type is set to HTTP. NOTE: This parameter is reserved.

**Table 4** **pools** parameter description
Parameter	Type	Description
id	String	Specifies the ID of the associated backend server group.

**Table 5** **healthmonitors_links** parameter description
Parameter	Type	Description
href	String	Provides links to the previous or next page during pagination query, respectively.
rel	String	Specifies the prompt of the previous or next page. The value can be next or previous. The value next indicates the href containing the URL of the next page, and previous indicates the href containing the URL of the previous page.

Example Request

Example request 1: Querying all health checks

GET https://{Endpoint}/v2.0/lbaas/healthmonitors

Example request 2: Querying HTTP health checks

GET https://{Endpoint}/v2.0/lbaas/healthmonitors?type=HTTP

Example Response

Example response 1

{
    "healthmonitors": [
        {
            "monitor_port": null,
            "name": "",
            "admin_state_up": true,
            "tenant_id": "601240b9c5c94059b63d484c92cfe308",
 
            "domain_name": null,
            "delay": 5,
            
            "max_retries": 3,
            "max_retries_down": 5,
            "http_method": "GET",
            "timeout": 10,
            "pools": [
                {
                    "id": "caef8316-6b65-4676-8293-cf41fb63cc2a"
                }
            ],
            "url_path": "/",
            "type": "HTTP",
            "id": "1b587819-d619-49c1-9101-fe72d8b361ef"
        }
    ]
}

Example response 2

{
    "healthmonitors": [
        {
            "monitor_port": null,
            "name": "",
            "admin_state_up": true,
            "tenant_id": "601240b9c5c94059b63d484c92cfe308",
            "domain_name": null,
            "delay": 5,
            "expected_codes": "200-204,300-302,401",
            "max_retries": 3,
            "max_retries_down": 5,
            "http_method": "GET",
            "timeout": 10,
            "pools": [
                {
                    "id": "caef8316-6b65-4676-8293-cf41fb63cc2a"
                }
            ],
            "url_path": "/",
            "type": "HTTP",
            "id": "1b587819-d619-49c1-9101-fe72d8b361ef"
        }
    ]
}