Querying Load Balancers

Updated on 2025-02-25 GMT+08:00

View PDF

Function

This API is used to query load balancers and display them in a list. Filter query and pagination query are supported. Unless otherwise specified, exact match is applied.

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.

URI

GET /v2.0/lbaas/loadbalancers

Request

**Table 1** Parameter description
Parameter	Mandatory	Type	Description
marker	No	String	Specifies the ID of the load balancer from which pagination query starts, that is, the ID of the last load balancer on the previous page. This parameter must be used together with limit.
limit	No	Integer	Specifies the number of load balancers on each page.
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.
tenant_id	No	String	Specifies the ID of the project where the load balancer is used.
project_id	No	String	Specifies the ID of the project to which the load balancer belongs. This parameter has the same meaning as tenant_id.
id	No	String	Specifies the load balancer ID.
description	No	String	Provides supplementary information about the load balancer. The value contains a maximum of 255 characters.
name	No	String	Specifies the load balancer name. The value contains a maximum of 255 characters.
operating_status	No	String	Specifies the operating status of the load balancer. This parameter is reserved, and its value can be ONLINE or FROZEN.
provisioning_status	No	String	This parameter is reserved, and its value can only be ACTIVE. It specifies the provisioning status of the load balancer.
admin_state_up	No	Boolean	This parameter is reserved, and its value can only be true. It specifies the administrative status of the load balancer.
vip_address	No	String	Specifies the private IP address of the load balancer. The value contains a maximum of 64 characters.
vip_port_id	No	String	Specifies the ID of the port bound to the private IP address of the load balancer.
vip_subnet_id	No	String	Specifies the ID of the IPv4 subnet where the load balancer works.
member_address	No	String	Specifies the IP address of the backend server associated with the load balancer.
member_device_id	No	String	Specifies the ID of the cloud server used as the backend server associated with the load balancer.
vpc_id	No	String	Specifies the ID of the VPC where the load balancer works.

Response

**Table 2** Response parameters
Parameter	Type	Description
loadbalancers	Array	Lists the load balancers. For details, see Table 3.
loadbalancers_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 6.

**Table 3** **loadbalancer** parameter description
Parameter	Mandatory	Type	Description
name	No	String	Specifies the load balancer name. The value contains a maximum of 255 characters.
description	No	String	Provides supplementary information about the load balancer. The value contains a maximum of 255 characters.
tenant_id	No	String	Specifies the ID of the project where the load balancer is used. The value contains a maximum of 255 characters. The value must be the same as the value of project_id in the token.
project_id	No	String	Specifies the ID of the project to which the load balancer belongs. This parameter has the same meaning as tenant_id. The value must be the same as the value of project_id in the token.
vip_subnet_id	Yes	String	Specifies the ID of the IPv4 subnet where the load balancer works. You can obtain the value by calling the API for querying subnets ({VPC endpoint}/v2.0/subnets) using the GET method. The private IP address of the load balancer is in this subnet. Only IPv4 subnets are supported. IPv6 subnets are not supported.
provider	No	String	Specifies the provider of the load balancer. The value can only be vlb.
vip_address	No	String	Specifies the private IP address of the load balancer. This IP address must be the one in the subnet specified by vip_subnet_id. If this parameter is not specified, an IP address is automatically assigned to the load balancer from the subnet specified by vip_subnet_id. The value contains a maximum of 64 characters.
admin_state_up	No	Boolean	Specifies the administrative status of the load balancer. This parameter is reserved. The default value is true.

**Table 4** **listeners** parameter description
Parameter	Type	Description
id	String	Specifies the ID of the associated listener.

**Table 5** **pools** parameter description
Parameter	Type	Description
id	String	Specifies the ID of the associated backend server group.

**Table 6** **loadbalancers_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 Hypertext Reference (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 load balancers

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

Example request 2: Querying load balancers by page (Each page contains one load balancer. The ID of the start load balancer is 165b6a38-5278-4569-b747-b2ee65ea84a4. The load balancer after 165b6a38-5278-4569-b747-b2ee65ea84a4 is the queried load balancer.)
```
GET https://{Endpoint}/v2.0/lbaas/loadbalancers?limit=1&marker=165b6a38-5278-4569-b747-b2ee65ea84a4
```
Example request 3: Querying the load balancer using the IP address of a backend server (192.168.0.191)
```
GET https://{Endpoint}/v2.0/lbaas/loadbalancers?member_address=192.168.0.181
```

Example Response

Example response 1

{
    "loadbalancers": [
        {
            "description": "simple lb",
            "admin_state_up": true,
            "tenant_id": "1a3e005cf9ce40308c900bcb08e5320c",
            "project_id": "1a3e005cf9ce40308c900bcb08e5320c",
            "provisioning_status": "ACTIVE",
            "vip_subnet_id": "5328f1e6-ce29-44f1-9493-b128a5653350",
            "listeners": [
                {
                    "id": "45196943-2907-4369-87b1-c009b1d7ac35"
                }
            ],
            "vip_address": "10.0.0.2",
            "vip_port_id": "cbced4fe-6f6f-4fd6-9348-0c3d1219d6ca",
            "provider": "vlb",
            "pools": [
                {
                    "id": "21d49cf7-4fd3-4cb6-8c48-b7fc6c259aab"
            }
            ],
            "id": "a9729389-6147-41a3-ab22-a24aed8692b2",
            "operating_status": "ONLINE",
            "tags": [],
            "name": "loadbalancer1",
            "created_at": "2018-07-25T01:54:13", 
            "updated_at": "2018-07-25T01:54:14"
        }
    ]
}

Example response 2

{
    "loadbalancers": [
        {
            "description": "",
            "provisioning_status": "ACTIVE",
            "tenant_id": "601240b9c5c94059b63d484c92cfe308",
            "project_id": "601240b9c5c94059b63d484c92cfe308",
            "admin_state_up": true,
            "provider": "vlb",
            "pools": [
                {
                    "id": "b13dba4c-a44c-4c40-8f6e-ce7a162b9f22"
                },
                {
                    "id": "4b9e765f-82ee-4128-911b-0a2d9ebc74c7"
                }
            ],
            "listeners": [
                {
                    "id": "21c41336-d0d3-4349-8641-6e82b4a4d097"
                }
            ],
            "vip_port_id": "44ac5d9b-b0c0-4810-9a9d-c4dbf541e47e",
            "operating_status": "ONLINE",
            "vip_address": "192.168.0.234",
            "vip_subnet_id": "9d60827e-0e5c-490a-8183-0b6ebf9084ca",
            "id": "e79a7dd6-3a38-429a-95f9-c7f78b346cbe",
            "tags": [],
            "name": "elb-robot",
            "created_at": "2018-07-25T01:54:13", 
            "updated_at": "2018-07-25T01:54:14"
        }
    ],
    "loadbalancers_links": [
        {
            "href": "https://network.Region.dc1.domainname.com/v2.0/lbaas/loadbalancers?limit=10&marker=e79a7dd6-3a38-429a-95f9-c7f78b346cbe&page_reverse=True",
              "rel": "previous"
        }
    ]
}

Example response 3

{
    "loadbalancers": [
        {
            "description": "",
            "provisioning_status": "ACTIVE",
            "tenant_id": "601240b9c5c94059b63d484c92cfe308",
            "project_id": "601240b9c5c94059b63d484c92cfe308",
            "created_at": "2018-11-29T13:55:20",
            "admin_state_up": true,
            "update_at": "2018-11-29T13:55:21",
            "id": "c1127125-64a9-4394-a08a-ef3be8f7ef9c",
            "pools": [
                {
                    "id": "2f6895be-019b-4c82-9b53-c4a2ac009e20"
                }
            ],
            "listeners": [
                {
                    "id": "5c63d176-444f-4c75-9cfe-bcb8a05a845c"
                }
            ],
            "vip_port_id": "434ac600-b779-4428-b7a7-830e047511f1",
            "operating_status": "ONLINE",
            "vip_address": "192.168.0.181",
            "vip_subnet_id": "9a303536-417c-45dc-a6db-1234b9e1c2b2",
            "provider": "vlb",
            "tags": [],
            "name": "elb-ftci"

        }
    ]
}