Updated on 2025-08-21 GMT+08:00

Creating a Log Stream

Function

This API is used to create a log stream. You can create log streams in a specified log group to organize logs by category, facilitating log locating and analysis.

Calling Method

For details, see Calling APIs.

URI

POST /v2/{project_id}/groups/{log_group_id}/streams

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Definition

Project ID. It can be obtained by calling an API or from the console. For details, see Obtaining a Project ID.

Constraints

N/A

Range

N/A

Default Value

N/A

log_group_id

Yes

String

Definition

Log group ID. For details about how to obtain it, see Obtaining Log Group and Log Stream IDs.

Constraints

N/A

Range

N/A

Default Value

N/A

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

Definition

User token obtained from IAM. For details about how to obtain it, see Obtaining a User Token.

Constraints:

N/A

Range

N/A

Default Value

N/A

Content-Type

Yes

String

Definition

Message body format. Set this parameter to application/json;charset=utf8.

Constraints

N/A

Range

N/A

Default Value

N/A

Table 3 Request body parameters

Parameter

Mandatory

Type

Description

log_stream_name

Yes

String

Definition

Name of the log stream.

Constraints

N/A

Range

  • Use only letters, digits, hyphens (-), underscores (_), and periods (.). Do not start with a period or underscore or end with a period.

  • Enter 1 to 64 characters.

  • Each log stream name must be unique.

Default Value

N/A

ttl_in_days

No

Integer

Definition

Log retention period for a log stream. It determines how many days a log stream's logs will be stored in LTS.

Constraints

If not specified, the value inherits the log group's retention period by default.

Range

Minimum value: 1 day

Maximum value: 365 days

Default Value

30: By default, log data is stored for 30 days.

tags

No

Array of tagsBody objects

Definition

Log stream tags.

Constraints

You can add up to 20 tags.

log_stream_name_alias

No

String

Definition

Log stream alias.

Constraints

The log stream alias cannot be the same as the name or original name of another log stream.

Range

  • Use only letters, digits, hyphens (-), underscores (_), and periods (.). Do not start with a period or underscore or end with a period.

  • Enter 1 to 64 characters.

Default Value

N/A

enterprise_project_name

No

String

Definition

Enterprise project name. For details about how to obtain it, see Obtaining an Enterprise Project ID.

Constraints

N/A

Range

N/A

Default Value

N/A

Table 4 tagsBody

Parameter

Mandatory

Type

Description

key

Yes

String

Definition

Tag key.

Constraints

  • Each tag key must be unique.

  • A tag is a key-value pair. Each key is paired with its corresponding value.

Range

Each tag key can contain up to 128 characters, including only letters, digits, spaces, and special characters (_.:=+-@). Do not start or end with a space, nor start with sys.

Default Value

N/A

value

No

String

Definition

Tag value.

Constraints

A tag is a key-value pair. Each key is paired with its corresponding value.

Range

  • A tag value can contain letters, digits, spaces, and special characters (_.:=+-@).

  • A tag value can contain up to 255 characters.

Default Value

N/A

Response Parameters

Status code: 201

Table 5 Response body parameters

Parameter

Type

Description

log_stream_id

String

Definition

ID of the log stream to be created.

Range

N/A

Status code: 400

Table 6 Response body parameters

Parameter

Type

Description

error_code

String

Definition

Error code. For details, see Error Codes.

Range

N/A

error_msg

String

Definition

Error message.

Range

N/A

Status code: 401

Table 7 Response body parameters

Parameter

Type

Description

error_code

String

Definition

Error code. For details, see Error Codes.

Range

N/A

error_msg

String

Definition

Error message.

Range

N/A

Status code: 403

Table 8 Response body parameters

Parameter

Type

Description

error_code

String

Definition

Error code. For details, see Error Codes.

Range

N/A

error_msg

String

Definition

Error message.

Range

N/A

Status code: 500

Table 9 Response body parameters

Parameter

Type

Description

error_code

String

Definition

Error code. For details, see Error Codes.

Range

N/A

error_msg

String

Definition

Error message.

Range

N/A

Example Requests

Create a log stream.

POST https://{endpoint}/v2/{project_id}/groups/{log_group_id}/streams

{
  "log_stream_name" : "lts-stream-02kh"
}

Example Responses

Status code: 201

The request is successful and the log stream has been created.

{
  "log_stream_id" : "c54dbc58-0fd8-48ed-b007-6d54981427a7"
}

Status code: 400

Invalid request. Modify the request based on the description in error_msg before a retry.

{
  "error_code" : "LTS.0009",
  "error_msg" : "Failed to validate the request body"
}

Status code: 401

Authentication failed. Check the token and try again.

{
  "error_code" : "LTS.0003",
  "error_msg" : "Invalid token"
}

Status code: 403

Request rejected. The server has received the request and understood it, but refuses to respond to it. The client should not repeat the request without modifications.

{
  "error_code" : "LTS.0001",
  "error_msg" : "Invalid projectId"
}

Status code: 500

The server has received the request but encountered an internal error.

{
  "error_code" : "LTS.0202",
  "error_msg" : "Failed to create Log stream"
}

SDK Sample Code

The SDK sample code is as follows.

Create a log stream.

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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.lts.v2.region.LtsRegion;
import com.huaweicloud.sdk.lts.v2.*;
import com.huaweicloud.sdk.lts.v2.model.*;


public class CreateLogStreamSolution {

    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);

        LtsClient client = LtsClient.newBuilder()
                .withCredential(auth)
                .withRegion(LtsRegion.valueOf("<YOUR REGION>"))
                .build();
        CreateLogStreamRequest request = new CreateLogStreamRequest();
        request.withLogGroupId("{log_group_id}");
        CreateLogStreamParams body = new CreateLogStreamParams();
        body.withLogStreamName("lts-stream-02kh");
        request.withBody(body);
        try {
            CreateLogStreamResponse response = client.createLogStream(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());
        }
    }
}

Create a log stream.

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdklts.v2.region.lts_region import LtsRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdklts.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 = LtsClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(LtsRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CreateLogStreamRequest()
        request.log_group_id = "{log_group_id}"
        request.body = CreateLogStreamParams(
            log_stream_name="lts-stream-02kh"
        )
        response = client.create_log_stream(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Create a log stream.

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    lts "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/lts/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/lts/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/lts/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 := lts.NewLtsClient(
        lts.LtsClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.CreateLogStreamRequest{}
	request.LogGroupId = "{log_group_id}"
	request.Body = &model.CreateLogStreamParams{
		LogStreamName: "lts-stream-02kh",
	}
	response, err := client.CreateLogStream(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

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

201

The request is successful and the log stream has been created.

400

Invalid request. Modify the request based on the description in error_msg before a retry.

401

Authentication failed. Check the token and try again.

403

Request rejected. The server has received the request and understood it, but refuses to respond to it. The client should not repeat the request without modifications.

500

The server has received the request but encountered an internal error.

Error Codes

See Error Codes.