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

Listing Namespaces

Function

This API is used to list the namespaces.

Constraints

None.

Calling Method

For details, see Calling APIs.

URI

GET /v2/{project_id}/instances/{instance_id}/namespaces

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID.

instance_id

Yes

String

ID of an SWR Enterprise Edition instance.

Table 2 Query Parameters

Parameter

Mandatory

Type

Description

offset

No

Integer

Start index. The default value is 0. Note: The offset and limit parameters must be used together. The offset value must be 0 or a multiple of the limit value.

limit

No

Integer

Number of returned records. The default value is 10, and the maximum value is 100. Note: The offset and limit parameters must be used together. The offset value must be 0 or a multiple of the limit value.

order_column

No

String

Sorting by column. You can set the value to updated_at (sorting by update time).

order_type

No

String

Sorting type. The value can be desc (descending order) or asc (ascending order). This parameter is used together with order_column.

name

No

String

Namespace name. The value can contain 1 to 64 characters, starting and ending with a lowercase letter or digit. Only lowercase letters, digits, periods (.), underscores (_), and hyphens (-) are allowed. Periods, underscores, and hyphens cannot be placed next to each other.

public

No

String

Whether the namespace is public. If this parameter is not left empty and is not set to true, false is returned by default.

Request Parameters

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 the user token.

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

namespaces

Array of Namespace objects

Namespace list.

total

Integer

Total number of namespaces.

Table 5 Namespace

Parameter

Type

Description

name

String

Namespace name.

metadata

NamespaceMetadata object

Metadata.

namespace_id

Integer

Namespace ID.

created_at

String

Creation time.

updated_at

String

Update time.

repo_count

Integer

Number of images.

Table 6 NamespaceMetadata

Parameter

Type

Description

public

String

Whether the namespace is public. The value can be true or false.

Status code: 400

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: 401

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: 403

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: 404

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.

Status code: 500

Table 11 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

GET https://{endpoint}/v2/{project_id}/instances/{instance_id}/namespaces

Example Responses

Status code: 200

The namespace list is queried successfully.

{
  "total" : 18,
  "namespaces" : [ {
    "metadata" : {
      "public" : "false"
    },
    "name" : "testabc",
    "namespace_id" : 142,
    "repo_count" : 0,
    "created_at" : "2021-02-19T08:23:28.519Z",
    "updated_at" : "2021-02-19T08:23:28.519Z"
  } ]
}

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.*;


public class ListInstanceNamespacesSolution {

    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();
        ListInstanceNamespacesRequest request = new ListInstanceNamespacesRequest();
        request.withInstanceId("{instance_id}");
        try {
            ListInstanceNamespacesResponse response = client.listInstanceNamespaces(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 = ListInstanceNamespacesRequest()
        request.instance_id = "{instance_id}"
        response = client.list_instance_namespaces(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.ListInstanceNamespacesRequest{}
	request.InstanceId = "{instance_id}"
	response, err := client.ListInstanceNamespaces(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 namespace list is queried successfully.

400

Request error.

401

Authentication failed.

403

Access denied.

404

Resource not found.

500

Internal error.

Error Codes

See Error Codes.