Updated on 2025-09-26 GMT+08:00

Querying the Number of Resource Instances by Tag

Function

This API is used to query the number of resource instances by tag.

Constraints

None.

Calling Method

For details, see Calling APIs.

URI

POST /v2/{project_id}/{resource_type}/resource-instances/count

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID.

resource_type

Yes

String

Resource type. The supported resource type is instances.

Request Parameters

Table 2 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 the user token.

Table 3 Request body parameters

Parameter

Mandatory

Type

Description

tags

No

Array of TagsFilter objects

The resources to be queried contain tags listed in tags. Each instance to be queried contains a maximum of 50 keys. Each tag key has a maximum of 10 tag values. The tag value corresponding to each tag key can be an empty array but the structure cannot be missing. Each tag key and each value of the same tag key must be unique. The response returns resources containing all the specified tags. Keys are in the AND relationship and values in each key-value structure are in the OR relationship. If this parameter is not specified, all resources will be returned.

Table 4 TagsFilter

Parameter

Mandatory

Type

Description

key

Yes

String

Tag key. The key can contain a maximum of 128 Unicode characters. The tag key cannot be left empty.

values

Yes

Array of strings

Tag value list. Each value can contain a maximum of 255 Unicode characters. Before verification and usage, delete SBC spaces before and after the value. The value can be an empty array but cannot be left empty. If values is left empty, it indicates any value. All values of a tag key are in the OR relationship.

Response Parameters

Status code: 200

Table 5 Response body parameters

Parameter

Type

Description

total_count

Integer

Number of resource instances.

Status code: 400

Table 6 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

encoded_authorization_message

String

Detailed rejection reason after encryption. You can call the API decode-authorization-message of STS to decrypt the reason.

Status code: 401

Table 7 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

encoded_authorization_message

String

Detailed rejection reason after encryption. You can call the API decode-authorization-message of STS to decrypt the reason.

Status code: 403

Table 8 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

encoded_authorization_message

String

Detailed rejection reason after encryption. You can call the API decode-authorization-message of STS to decrypt the reason.

Status code: 404

Table 9 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

encoded_authorization_message

String

Detailed rejection reason after encryption. You can call the API decode-authorization-message of STS to decrypt the reason.

Status code: 500

Table 10 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

encoded_authorization_message

String

Detailed rejection reason after encryption. You can call the API decode-authorization-message of STS to decrypt the reason.

Example Requests

POST https://{endpoint}/v2/{project_id}/{resource_type}/resource-instances/count

{
  "tags" : [ {
    "key" : "key1",
    "values" : [ "*value1", "value2" ]
  } ]
}

Example Responses

Status code: 200

The number of resource instances is queried successfully.

{
  "total_count" : 1
}

SDK Sample Code

The SDK sample code is as follows.

Java

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.swr.v2.region.SwrRegion;
import com.huaweicloud.sdk.swr.v2.*;
import com.huaweicloud.sdk.swr.v2.model.*;

import java.util.List;
import java.util.ArrayList;

public class ShowInstanceResourceInstancesCountSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        SwrClient client = SwrClient.newBuilder()
                .withCredential(auth)
                .withRegion(SwrRegion.valueOf("<YOUR REGION>"))
                .build();
        ShowInstanceResourceInstancesCountRequest request = new ShowInstanceResourceInstancesCountRequest();
        request.withResourceType(ShowInstanceResourceInstancesCountRequest.ResourceTypeEnum.fromValue("{resource_type}"));
        ListResourceInstancesRequestBody body = new ListResourceInstancesRequestBody();
        List<String> listTagsValues = new ArrayList<>();
        listTagsValues.add("*value1");
        listTagsValues.add("value2");
        List<TagsFilter> listbodyTags = new ArrayList<>();
        listbodyTags.add(
            new TagsFilter()
                .withKey("key1")
                .withValues(listTagsValues)
        );
        body.withTags(listbodyTags);
        request.withBody(body);
        try {
            ShowInstanceResourceInstancesCountResponse response = client.showInstanceResourceInstancesCount(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

Python

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkswr.v2.region.swr_region import SwrRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkswr.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = SwrClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(SwrRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = ShowInstanceResourceInstancesCountRequest()
        request.resource_type = "{resource_type}"
        listValuesTags = [
            "*value1",
            "value2"
        ]
        listTagsbody = [
            TagsFilter(
                key="key1",
                values=listValuesTags
            )
        ]
        request.body = ListResourceInstancesRequestBody(
            tags=listTagsbody
        )
        response = client.show_instance_resource_instances_count(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Go

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    swr "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/swr/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/swr/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/swr/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        Build()

    client := swr.NewSwrClient(
        swr.SwrClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.ShowInstanceResourceInstancesCountRequest{}
	request.ResourceType = model.GetShowInstanceResourceInstancesCountRequestResourceTypeEnum().RESOURCE_TYPE
	var listValuesTags = []string{
        "*value1",
	    "value2",
    }
	var listTagsbody = []model.TagsFilter{
        {
            Key: "key1",
            Values: listValuesTags,
        },
    }
	request.Body = &model.ListResourceInstancesRequestBody{
		Tags: &listTagsbody,
	}
	response, err := client.ShowInstanceResourceInstancesCount(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

More

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

200

The number of resource instances is queried successfully.

400

Request error.

401

Authentication failed.

403

Access denied.

404

Resource not found.

500

Internal error.

Error Codes

See Error Codes.