Object Storage Service:Object-level retention policy (ObjectWorm)

Console

1. Faça logon no console do OSS.

2. No painel de navegação à esquerda, clique em Buckets e, em seguida, no nome do bucket de destino.

3. No painel de navegação à esquerda, escolha Data Protection > Object-Level Retention Policy.

4. clique em Enable.

5. Configure a política de retenção padrão:

   • Not Set: Nenhuma política de retenção padrão é aplicada. Os objetos carregados não são protegidos automaticamente.

   • Compliance Mode: Nenhum usuário — incluindo o usuário raiz — pode excluir ou sobrescrever um objeto protegido durante o período de retenção.

     • Retention Period: Defina a duração da retenção e selecione Days ou Year como unidade.

6. clique em Save e confirme inserindo o texto necessário na caixa de diálogo.

ossutil

Ative o ObjectWorm para o bucket examplebucket e defina uma política de retenção de conformidade padrão com um período de 1 dia.

<?xml version="1.0" encoding="UTF-8"?>
<ObjectWormConfiguration>
  <ObjectWormEnabled>Enabled</ObjectWormEnabled>
  <Rule>
    <DefaultRetention>
      <Mode>COMPLIANCE</Mode>
      <Days>1</Days>
    </DefaultRetention>
  </Rule>
</ObjectWormConfiguration>

ossutil api put-bucket-object-worm-configuration --bucket examplebucket --object-worm-configuration file://object-worm-configuration.xml

SDK

Os exemplos a seguir ativam o ObjectWorm e configuram uma política de retenção padrão usando um SDK.

import argparse
import alibabacloud_oss_v2 as oss

parser = argparse.ArgumentParser(description="put bucket object worm configuration sample")
parser.add_argument('--region', help='The region in which the bucket is located.', required=True)
parser.add_argument('--bucket', help='The name of the bucket.', required=True)
parser.add_argument('--endpoint', help='The OSS endpoint. If not specified, the SDK determines the endpoint based on the region.')
parser.add_argument('--mode', help='The retention mode. Valid values: GOVERNANCE, COMPLIANCE', default='GOVERNANCE')
parser.add_argument('--days', help='Object-level retention policy days (max 36500)', type=int)
parser.add_argument('--years', help='Bucket object level retention policy years (max 100)', type=int)

def main():

    args = parser.parse_args()

    # Loading credentials from the environment variables
    credentials_provider = oss.credentials.EnvironmentVariableCredentialsProvider()

    # Using the SDK's default configuration
    cfg = oss.config.load_default()
    cfg.credentials_provider = credentials_provider
    cfg.region = args.region
    if args.endpoint is not None:
        cfg.endpoint = args.endpoint

    client = oss.Client(cfg)

    # Create a default retention rule
    default_retention = oss.ObjectWormConfigurationRuleDefaultRetention(
        mode=args.mode,
        days=args.days,
        # Specify either days or years, but not both.
        # years=args.years,
    )

    # Create the rule
    rule = oss.ObjectWormConfigurationRule(
        default_retention=default_retention,
    )

    # Create the WORM configuration
    config = oss.ObjectWormConfiguration(
        object_worm_enabled='Enabled',
        rule=rule,
    )

    result = client.put_bucket_object_worm_configuration(oss.PutBucketObjectWormConfigurationRequest(
        bucket=args.bucket,
        object_worm_configuration=config,
    ))

    print(f'status code: {result.status_code},'
          f' request id: {result.request_id},'
    )

if __name__ == "__main__":
    main()

package main

import (
	"context"
	"flag"
	"log"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
)

var (
	region     string
	bucketName string
)

func init() {
	flag.StringVar(&region, "region", "", "The region in which the bucket is located.")
	flag.StringVar(&bucketName, "bucket", "", "The name of the bucket.")
}

func main() {
	flag.Parse()
	if len(bucketName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, bucket name required")
	}

	if len(region) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, region required")
	}

	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion(region)

	client := oss.NewClient(cfg)

	request := &oss.PutBucketObjectWormConfigurationRequest{
		Bucket: oss.Ptr(bucketName),
		ObjectWormConfiguration: &oss.ObjectWormConfiguration{
			ObjectWormEnabled: oss.Ptr("Enabled"),
			Rule: &oss.ObjectWormRule{
				DefaultRetention: &oss.ObjectWormDefaultRetention{
					Mode: oss.Ptr("COMPLIANCE"),
					Days: oss.Ptr(int32(1)),
				},
			},
		},
	}

	result, err := client.PutBucketObjectWormConfiguration(context.TODO(), request)
	if err != nil {
		log.Fatalf("Failed to put bucket Object WORM configuration: %v", err)
	}
	log.Printf("Put bucket Object WORM configuration result: %#v\n", result)
}

import com.aliyun.sdk.service.oss2.OSSClient;
import com.aliyun.sdk.service.oss2.OSSClientBuilder;
import com.aliyun.sdk.service.oss2.credentials.CredentialsProvider;
import com.aliyun.sdk.service.oss2.credentials.EnvironmentVariableCredentialsProvider;
import com.aliyun.sdk.service.oss2.models.*;

public class PutBucketObjectWormConfigurationDemo {

    public static void main(String[] args) {

        CredentialsProvider provider = new EnvironmentVariableCredentialsProvider();
        OSSClient client = OSSClient.newBuilder()
                .credentialsProvider(provider)
                .region("cn-hangzhou")
                .build();

        try {
            ObjectWormConfigurationDefaultRetention defaultRetention = ObjectWormConfigurationDefaultRetention.newBuilder()
                    .mode("COMPLIANCE")
                    .days(1)
                    .build();

            ObjectWormConfigurationRule rule = ObjectWormConfigurationRule.newBuilder()
                    .defaultRetention(defaultRetention)
                    .build();

            ObjectWormConfiguration objectWormConfiguration = ObjectWormConfiguration.newBuilder()
                    .objectWormEnabled("Enabled")
                    .rule(rule)
                    .build();

            PutBucketObjectWormConfigurationRequest request = PutBucketObjectWormConfigurationRequest.newBuilder()
                    .bucket("examplebucket")
                    .objectWormConfiguration(objectWormConfiguration)
                    .build();

            PutBucketObjectWormConfigurationResult result = client.putBucketObjectWormConfiguration(request);

            System.out.printf("Status code:%d, request id:%s%n",
                    result.statusCode(), result.requestId());

        } catch (Exception e) {
            System.out.printf("error: %s%n", e);
        } finally {
            client.close();
        }
    }
}

API

Chame a API PutBucketObjectWormConfiguration para ativar o ObjectWorm. O exemplo a seguir ativa o ObjectWorm para um bucket com uma política de retenção de conformidade padrão de 1 dia.

PUT /?objectWorm HTTP/1.1
Date: Thu, 17 Mar 2026 11:18:32 GMT
Content-Length: 188
Content-Type: application/xml
Content-MD5: B2M2Y8AsgTpgAmY7PhC****
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
Authorization: OSS4-HMAC-SHA256 Credential=LTAI********************/20260317/cn-hangzhou/oss/aliyun_v4_request,AdditionalHeaders=content-length,Signature=a7c3554c729d****

<?xml version="1.0" encoding="UTF-8"?>
<ObjectWormConfiguration>
  <ObjectWormEnabled>Enabled</ObjectWormEnabled>
  <Rule>
    <DefaultRetention>
      <Mode>COMPLIANCE</Mode>
      <Days>1</Days>
    </DefaultRetention>
  </Rule>
</ObjectWormConfiguration>

Console

Configure uma política de retenção para um objeto existente a partir da lista de arquivos ou da página de detalhes do arquivo.

1. Faça logon no console do OSS.

2. No painel de navegação à esquerda, clique em Buckets e, em seguida, no nome do bucket de destino.

3. No painel de navegação à esquerda, clique em Object Management e localize o objeto de destino.

4. À direita do objeto de destino, escolha More > Object-Level Retention Policy.

5. No painel de configurações, configure o Default Retention Pattern e o Retention Period e, em seguida, clique em OK.

ossutil

Defina uma política de retenção de conformidade para exampleobject no examplebucket, com data de retenção até 2026-12-31T00:00:00.000Z.

<?xml version="1.0" encoding="UTF-8"?>
<Retention>
  <Mode>COMPLIANCE</Mode>
  <RetainUntilDate>2026-12-31T00:00:00.000Z</RetainUntilDate>
</Retention>

ossutil api put-object-retention --bucket examplebucket --key exampleobject --retention file://retention.xml

SDK

Os exemplos a seguir configuram uma política de retenção para um objeto usando um SDK.

import argparse
import alibabacloud_oss_v2 as oss
from datetime import datetime, timedelta, timezone

parser = argparse.ArgumentParser(description="put object retention sample")
parser.add_argument('--region', help='The region in which the bucket is located.', required=True)
parser.add_argument('--bucket', help='The name of the bucket.', required=True)
parser.add_argument('--endpoint', help='The OSS endpoint. If not specified, the SDK determines the endpoint based on the region.')
parser.add_argument('--key', help='The object key.', required=True)

def main():

    args = parser.parse_args()

    # Loading credentials from the environment variables
    credentials_provider = oss.credentials.EnvironmentVariableCredentialsProvider()

    # Using the SDK's default configuration
    cfg = oss.config.load_default()
    cfg.credentials_provider = credentials_provider
    cfg.region = args.region
    if args.endpoint is not None:
        cfg.endpoint = args.endpoint

    client = oss.Client(cfg)

    # Calculate retain until date (1 day from now) in ISO 8601 format
    # Use UTC time (recommended for OSS)
    retain_until_date = datetime.now(timezone.utc) + timedelta(days=1)
    retain_until_iso = retain_until_date.strftime('%Y-%m-%dT%H:%M:%S.000Z')

    # Create retention configuration
    retention_config = oss.Retention(
        mode=oss.ObjectRetentionModeType.COMPLIANCE,
        retain_until_date=retain_until_iso,
    )

    # Set object retention
    result = client.put_object_retention(oss.PutObjectRetentionRequest(
        bucket=args.bucket,
        key=args.key,
        retention=retention_config,
    ))

    print(f'status code: {result.status_code},'
          f' request id: {result.request_id}')

if __name__ == "__main__":
    main()

package main

import (
	"context"
	"flag"
	"log"
	"time"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
)

var (
	region     string
	bucketName string
	objectName string
)

func init() {
	flag.StringVar(&region, "region", "", "The region in which the bucket is located.")
	flag.StringVar(&bucketName, "bucket", "", "The name of the bucket.")
	flag.StringVar(&objectName, "object", "", "The name of the object.")
}

func main() {
	flag.Parse()
	if len(region) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, region required")
	}
	if len(bucketName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, bucket name required")
	}
	if len(objectName) == 0 {
		flag.PrintDefaults()
		log.Fatalf("invalid parameters, object name required")
	}
	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion(region)
	client := oss.NewClient(cfg)

	date := time.Now().UTC().Add(5 * time.Hour).Format("2006-01-02T15:04:05.000Z")
	putRequest := &oss.PutObjectRetentionRequest{
		Bucket: oss.Ptr(bucketName),
		Key:    oss.Ptr(objectName),
		Retention: &oss.ObjectWormRetention{
			Mode:            oss.Ptr("COMPLIANCE"),
			RetainUntilDate: oss.Ptr(date),
		},
	}
	putResult, err := client.PutObjectRetention(context.TODO(), putRequest)
	if err != nil {
		log.Fatalf("Failed to put object retention policy: %v", err)
	}
	log.Printf("Put object retention policy result: %#v\n", putResult)
}

import com.aliyun.sdk.service.oss2.OSSClient;
import com.aliyun.sdk.service.oss2.OSSClientBuilder;
import com.aliyun.sdk.service.oss2.credentials.CredentialsProvider;
import com.aliyun.sdk.service.oss2.credentials.EnvironmentVariableCredentialsProvider;
import com.aliyun.sdk.service.oss2.models.*;

public class PutObjectRetentionDemo {

    public static void main(String[] args) {

        CredentialsProvider provider = new EnvironmentVariableCredentialsProvider();
        OSSClient client = OSSClient.newBuilder()
                .credentialsProvider(provider)
                .region("cn-hangzhou")
                .build();

        try {
            Retention retention = Retention.newBuilder()
                    .mode("COMPLIANCE")
                    .retainUntilDate("2026-12-31T00:00:00.000Z")
                    .build();

            PutObjectRetentionRequest request = PutObjectRetentionRequest.newBuilder()
                    .bucket("examplebucket")
                    .key("exampleobject")
                    .retention(retention)
                    .build();

            PutObjectRetentionResult result = client.putObjectRetention(request);

            System.out.printf("Status code:%d, request id:%s%n",
                    result.statusCode(), result.requestId());

        } catch (Exception e) {
            System.out.printf("error: %s%n", e);
        } finally {
            client.close();
        }
    }
}

API

Chame a API PutObjectRetention e defina uma política de retenção para um objeto. Exemplo de requisição:

PUT /exampleobject?retention&versionId=CAEQNhiBgMDJgZCA0BYiIDc4MGZj**** HTTP/1.1
Date: Thu, 17 Mar 2026 11:18:32 GMT
Content-MD5: B2M2Y8AsgTpgAmY7PhC****
Content-Type: application/xml
Content-Length: 162
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
Authorization: OSS4-HMAC-SHA256 Credential=LTAI********************/20260317/cn-hangzhou/oss/aliyun_v4_request,Signature=****

<Retention>
  <Mode>COMPLIANCE</Mode>
  <RetainUntilDate>2026-10-11T00:00:00.000Z</RetainUntilDate>
</Retention>

Console

1. Faça logon no console do OSS e acesse a página de Object Management do bucket de destino.

2. clique em Upload Object.

3. No painel de upload, expanda Advanced Settings e localize a configuração Default Retention Policy.

4. Selecione {policyType}, configure o Retention Pattern e o Retention Period e, em seguida, carregue o arquivo.

   Nota

   Se você selecionar {policyType}, o objeto carregado herdará automaticamente a política de retenção padrão do bucket.

ossutil

Use o comando put-object com --object-worm-mode e --object-worm-retain-until-date e defina uma política de retenção durante o upload.

ossutil api put-object --bucket examplebucket --key exampleobject --body file://localfile.txt --object-worm-mode COMPLIANCE --object-worm-retain-until-date 2026-10-11T00:00:00.000Z

SDK

O exemplo a seguir define uma política de retenção ao chamar a API PutObject para carregar um objeto.

import alibabacloud_oss_v2 as oss

credentials_provider = oss.credentials.EnvironmentVariableCredentialsProvider()
cfg = oss.config.load_default()
cfg.credentials_provider = credentials_provider
cfg.region = 'cn-hangzhou'
client = oss.Client(cfg)

# Upload the object and set a retention policy: compliance mode, retain until October 11, 2026.
result = client.put_object(oss.PutObjectRequest(
    bucket='examplebucket',
    key='exampleobject',
    body='Hello OSS',
    object_worm_mode='COMPLIANCE',
    object_worm_retain_until_date='2026-10-11T00:00:00.000Z',
))
print(f'status code: {result.status_code}')

import com.aliyun.sdk.service.oss2.OSSClient;
import com.aliyun.sdk.service.oss2.credentials.EnvironmentVariableCredentialsProvider;
import com.aliyun.sdk.service.oss2.models.*;
import com.aliyun.sdk.service.oss2.transport.BinaryData;

public class UploadWithRetention {
    public static void main(String[] args) {
        OSSClient client = OSSClient.newBuilder()
            .credentialsProvider(new EnvironmentVariableCredentialsProvider())
            .region("cn-hangzhou")
            .build();

        try {
            // Upload the object and set a retention policy: compliance mode, retain until October 11, 2026.
            PutObjectResult result = client.putObject(PutObjectRequest.newBuilder()
                .bucket("examplebucket")
                .key("exampleobject")
                .body(BinaryData.fromString("Hello OSS"))
                .header("x-oss-object-worm-mode", "COMPLIANCE")
                .header("x-oss-object-worm-retain-until-date", "2026-10-11T00:00:00.000Z")
                .build());

            System.out.printf("status code: %d%n", result.statusCode());
        } finally {
            client.close();
        }
    }
}

package main

import (
	"context"
	"fmt"
	"strings"

	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
)

func main() {
	cfg := oss.LoadDefaultConfig().
		WithCredentialsProvider(credentials.NewEnvironmentVariableCredentialsProvider()).
		WithRegion("cn-hangzhou")
	client := oss.NewClient(cfg)

	// Upload the object and set a retention policy: compliance mode, retain until October 11, 2026.
	request := &oss.PutObjectRequest{
		Bucket: oss.Ptr("examplebucket"),
		Key:    oss.Ptr("exampleobject"),
		Body:   strings.NewReader("Hello OSS"),
		RequestCommon: oss.RequestCommon{
			Headers: map[string]string{
				"x-oss-object-worm-mode":              "COMPLIANCE",
				"x-oss-object-worm-retain-until-date": "2026-10-11T00:00:00.000Z",
			},
		},
	}
	_, err := client.PutObject(context.TODO(), request)
	if err != nil {
		fmt.Println("Error:", err)
		return
	}
	fmt.Println("Object uploaded with retention successfully")
}

API

Chame a API PutObject para carregar um objeto e definir sua política de retenção nos cabeçalhos da requisição.

PUT /exampleobject HTTP/1.1
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
x-oss-object-worm-mode: COMPLIANCE
x-oss-object-worm-retain-until-date: 2026-10-11T00:00:00.000Z
Content-MD5: B2M2Y8AsgTpgAmY7PhC****
Authorization: SignatureValue

[Object Content]