使用对象保全

概览

本页面介绍了如何使用对象保全,包括默认情况下将保全放置在新对象上,以及将保全放置在个别对象上。

所需权限

在 Cloud Storage 中使用此功能之前,您必须拥有足够的权限来查看和更新 Cloud Storage 中的存储桶和对象:

  • 如果您拥有存储桶所属的项目,则您很可能具备所需的权限。

  • 如果您使用了 IAM,您应在相关存储桶上具有 storage.buckets.updatestorage.buckets.getstorage.objects.updatestorage.objects.get 权限。如需了解如何获取具有这些权限的角色(例如 Storage Admin),请参阅使用 IAM 权限

  • 如果使用 ACL,您应对相关存储桶及其中的对象具有 OWNER 权限。如需了解如何执行此操作,请参阅设置 ACL

使用默认的基于事件的保全属性

以下任务介绍了如何在存储桶上设置和查看基于事件的默认保全属性。启用此属性后,系统会自动在添加到存储桶的新对象上放置基于事件的保全。

设置默认的基于事件的保全属性

要为存储桶启用或停用基于事件的默认保全属性,请执行以下操作:

控制台

  1. 在 Google Cloud 控制台中,转到 Cloud Storage 存储桶页面。

    进入“存储桶”

  2. 在存储桶列表中,找到要设置默认的基于事件的保全属性的存储桶,并点击其名称。

  3. 选择页面顶部附近的保护标签页。

    存储桶的当前状态显示在“基于事件的默认保全选项”部分中。

  4. 在“基于事件的默认保全选项”部分中,点击当前状态即可进行更改。

    状态显示为已启用已停用

如需了解如何在 Google Cloud 控制台中获取失败的 Cloud Storage 操作的详细错误信息,请参阅问题排查

命令行

使用带有相应标志的 gcloud storage buckets update 命令:

gcloud storage buckets update gs://BUCKET_NAME FLAG

其中:

  • BUCKET_NAME 是相关存储桶的名称,例如 my-bucket

  • FLAG 可以为 --default-event-based-hold 以启用基于事件的默认对象保全,也可以为 --no-default-event-based-hold 以停用它们。

客户端库

C++

如需了解详情,请参阅 Cloud Storage C++ API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name) {
  StatusOr<gcs::BucketMetadata> original =
      client.GetBucketMetadata(bucket_name);
  if (!original) throw std::move(original).status();

  StatusOr<gcs::BucketMetadata> patched = client.PatchBucket(
      bucket_name,
      gcs::BucketMetadataPatchBuilder().SetDefaultEventBasedHold(true),
      gcs::IfMetagenerationMatch(original->metageneration()));
  if (!patched) throw std::move(patched).status();

  std::cout << "The default event-based hold for objects in bucket "
            << bucket_name << " is "
            << (patched->default_event_based_hold() ? "enabled" : "disabled")
            << "\n";
}

以下示例在存储桶上停用基于事件的默认保全:

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name) {
  StatusOr<gcs::BucketMetadata> original =
      client.GetBucketMetadata(bucket_name);

  if (!original) throw std::move(original).status();
  StatusOr<gcs::BucketMetadata> patched = client.PatchBucket(
      bucket_name,
      gcs::BucketMetadataPatchBuilder().SetDefaultEventBasedHold(false),
      gcs::IfMetagenerationMatch(original->metageneration()));
  if (!patched) throw std::move(patched).status();

  std::cout << "The default event-based hold for objects in bucket "
            << bucket_name << " is "
            << (patched->default_event_based_hold() ? "enabled" : "disabled")
            << "\n";
}

C#

如需了解详情,请参阅 Cloud Storage C# API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:


using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using System;

public class EnableBucketDefaultEventBasedHoldSample
{
    public Bucket EnableBucketDefaultEventBasedHold(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bucket.DefaultEventBasedHold = true;
        bucket = storage.UpdateBucket(bucket);
        Console.WriteLine($"Default event-based hold was enabled for {bucketName}");
        return bucket;
    }
}

以下示例在存储桶上停用基于事件的默认保全:


using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using System;

public class DisableDefaultEventBasedHoldSample
{
    public Bucket DisableDefaultEventBasedHold(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bucket.DefaultEventBasedHold = false;
        bucket = storage.UpdateBucket(bucket);
        Console.WriteLine($"Default event-based hold was disabled for {bucketName}");
        return bucket;
    }
}

Go

如需了解详情,请参阅 Cloud Storage Go API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// enableDefaultEventBasedHold sets event-based hold to true.
func enableDefaultEventBasedHold(w io.Writer, bucketName string) error {
	// bucketName := "bucket-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{
		DefaultEventBasedHold: true,
	}
	if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
		return fmt.Errorf("Bucket(%q).Update: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Default event-based hold was enabled for %v\n", bucketName)
	return nil
}

以下示例在存储桶上停用基于事件的默认保全:

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// disableDefaultEventBasedHold sets event-based hold to false.
func disableDefaultEventBasedHold(w io.Writer, bucketName string) error {
	// bucketName := "bucket-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{
		DefaultEventBasedHold: false,
	}
	if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
		return fmt.Errorf("Bucket(%q).Update: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Default event-based hold was disabled for %v\n", bucketName)
	return nil
}

Java

如需了解详情,请参阅 Cloud Storage Java API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:


import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.Storage.BucketTargetOption;
import com.google.cloud.storage.StorageException;
import com.google.cloud.storage.StorageOptions;

public class EnableDefaultEventBasedHold {
  public static void enableDefaultEventBasedHold(String projectId, String bucketName)
      throws StorageException {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    // first look up the bucket, so we will have its metageneration
    Bucket bucket = storage.get(bucketName);
    storage.update(
        bucket.toBuilder().setDefaultEventBasedHold(true).build(),
        BucketTargetOption.metagenerationMatch());

    System.out.println("Default event-based hold was enabled for " + bucketName);
  }
}

以下示例在存储桶上停用基于事件的默认保全:


import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.Storage.BucketTargetOption;
import com.google.cloud.storage.StorageException;
import com.google.cloud.storage.StorageOptions;

public class DisableDefaultEventBasedHold {
  public static void disableDefaultEventBasedHold(String projectId, String bucketName)
      throws StorageException {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    // first look up the bucket, so we will have its metageneration
    Bucket bucket = storage.get(bucketName);
    storage.update(
        bucket.toBuilder().setDefaultEventBasedHold(false).build(),
        BucketTargetOption.metagenerationMatch());

    System.out.println("Default event-based hold was disabled for " + bucketName);
  }
}

Node.js

如需了解详情,请参阅 Cloud Storage Node.js API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:


/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

async function enableDefaultEventBasedHold() {
  // Enables a default event-based hold for the bucket.
  await storage.bucket(bucketName).setMetadata({
    defaultEventBasedHold: true,
  });

  console.log(`Default event-based hold was enabled for ${bucketName}.`);
}

enableDefaultEventBasedHold().catch(console.error);

以下示例在存储桶上停用基于事件的默认保全:

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

async function disableDefaultEventBasedHold() {
  // Disables a default event-based hold for a bucket.
  await storage.bucket(bucketName).setMetadata({
    defaultEventBasedHold: false,
  });
  console.log(`Default event-based hold was disabled for ${bucketName}.`);
}

disableDefaultEventBasedHold().catch(console.error);

PHP

如需了解详情,请参阅 Cloud Storage PHP API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:

use Google\Cloud\Storage\StorageClient;

/**
 * Enables a default event-based hold for a bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function enable_default_event_based_hold(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $bucket->update(['defaultEventBasedHold' => true]);
    printf('Default event-based hold was enabled for %s' . PHP_EOL, $bucketName);
}

以下示例在存储桶上停用基于事件的默认保全:

use Google\Cloud\Storage\StorageClient;

/**
 * Disables a default event-based hold for a bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function disable_default_event_based_hold(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $bucket->update(['defaultEventBasedHold' => false]);
    printf('Default event-based hold was disabled for %s' . PHP_EOL, $bucketName);
}

Python

如需了解详情,请参阅 Cloud Storage Python API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:

from google.cloud import storage


def enable_default_event_based_hold(bucket_name):
    """Enables the default event based hold on a given bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.bucket(bucket_name)
    bucket.default_event_based_hold = True
    bucket.patch()

    print(f"Default event based hold was enabled for {bucket_name}")

以下示例在存储桶上停用基于事件的默认保全:

from google.cloud import storage


def disable_default_event_based_hold(bucket_name):
    """Disables the default event based hold on a given bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)
    bucket.default_event_based_hold = False
    bucket.patch()

    print(f"Default event based hold was disabled for {bucket_name}")

Ruby

如需了解详情,请参阅 Cloud Storage Ruby API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

以下示例在存储桶上启用基于事件的默认保全:

def enable_default_event_based_hold bucket_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name

  bucket.update do |b|
    b.default_event_based_hold = true
  end

  puts "Default event-based hold was enabled for #{bucket_name}."
end

以下示例在存储桶上停用基于事件的默认保全:

def disable_default_event_based_hold bucket_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name

  bucket.update do |b|
    b.default_event_based_hold = false
  end

  puts "Default event-based hold was disabled for #{bucket_name}."
end

REST API

JSON API

  1. 安装并初始化 gcloud CLI,以便为 Authorization 标头生成访问令牌。

  2. 创建一个包含以下信息的 JSON 文件:

    {
      "defaultEventBasedHold": STATE
    }

    其中 STATEtruefalse

  3. 使用 cURL,通过 PATCH Bucket 请求调用 JSON API:

    curl -X PATCH --data-binary @JSON_FILE_NAME \
    -H "Authorization: Bearer $(gcloud auth print-access-token)" \
    -H "Content-Type: application/json" \
    "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=defaultEventBasedHold"

    其中:

    • JSON_FILE_NAME 是您在第 2 步中创建的文件的路径。
    • BUCKET_NAME 是相关存储桶的名称,例如 my-bucket

XML API

XML API 不能用于处理对象保全。请改用其他 Cloud Storage 工具,例如 gcloud CLI。

获取存储桶的默认保全状态

要查看默认情况下存储桶是否在新对象上放置基于事件的保全,请执行以下操作:

控制台

  1. 在 Google Cloud 控制台中,转到 Cloud Storage 存储桶页面。

    进入“存储桶”

  2. 在存储桶列表中,找到要检查默认的基于事件的状态的存储桶,并点击其名称。

  3. 选择页面顶部附近的保护标签页。

  4. 状态会显示在“基于事件的默认保全选项”部分中。

如需了解如何在 Google Cloud 控制台中获取失败的 Cloud Storage 操作的详细错误信息,请参阅问题排查

命令行

使用带有 --format 标志的 gcloud storage buckets describe 命令:

gcloud storage buckets describe gs://BUCKET_NAME --format="default(default_event_based_hold)"

其中,BUCKET_NAME 是您要查看其状态的存储桶的名称,例如 my-bucket

如果成功,响应类似于以下示例:

default_event_based_hold: true

客户端库

C++

如需了解详情,请参阅 Cloud Storage C++ API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name) {
  StatusOr<gcs::BucketMetadata> bucket_metadata =
      client.GetBucketMetadata(bucket_name);
  if (!bucket_metadata) throw std::move(bucket_metadata).status();

  std::cout << "The default event-based hold for objects in bucket "
            << bucket_metadata->name() << " is "
            << (bucket_metadata->default_event_based_hold() ? "enabled"
                                                            : "disabled")
            << "\n";
}

C#

如需了解详情,请参阅 Cloud Storage C# API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证


using Google.Cloud.Storage.V1;
using System;

public class GetDefaultEventBasedHoldSample
{
    public bool GetDefaultEventBasedHold(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bool defaultEventBasedHold = bucket.DefaultEventBasedHold ?? false;
        Console.WriteLine($"Default event-based hold: {defaultEventBasedHold}");
        return defaultEventBasedHold;
    }
}

Go

如需了解详情,请参阅 Cloud Storage Go API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// getDefaultEventBasedHold gets default event-based hold state.
func getDefaultEventBasedHold(w io.Writer, bucketName string) (*storage.BucketAttrs, error) {
	// bucketName := "bucket-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return nil, fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	attrs, err := client.Bucket(bucketName).Attrs(ctx)
	if err != nil {
		return nil, fmt.Errorf("Bucket(%q).Attrs: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Default event-based hold enabled? %t\n", attrs.DefaultEventBasedHold)
	return attrs, nil
}

Java

如需了解详情,请参阅 Cloud Storage Java API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证


import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageException;
import com.google.cloud.storage.StorageOptions;

public class GetDefaultEventBasedHold {
  public static void getDefaultEventBasedHold(String projectId, String bucketName)
      throws StorageException {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    Bucket bucket =
        storage.get(
            bucketName,
            Storage.BucketGetOption.fields(Storage.BucketField.DEFAULT_EVENT_BASED_HOLD));

    if (bucket.getDefaultEventBasedHold() != null && bucket.getDefaultEventBasedHold()) {
      System.out.println("Default event-based hold is enabled for " + bucketName);
    } else {
      System.out.println("Default event-based hold is not enabled for " + bucketName);
    }
  }
}

Node.js

如需了解详情,请参阅 Cloud Storage Node.js API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

async function getDefaultEventBasedHold() {
  const [metadata] = await storage.bucket(bucketName).getMetadata();
  console.log(`Default event-based hold: ${metadata.defaultEventBasedHold}.`);
}

getDefaultEventBasedHold().catch(console.error);

PHP

如需了解详情,请参阅 Cloud Storage PHP API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

use Google\Cloud\Storage\StorageClient;

/**
 * Enables a default event-based hold for a bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function get_default_event_based_hold(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    if ($bucket->info()['defaultEventBasedHold']) {
        printf('Default event-based hold is enabled for ' . $bucketName . PHP_EOL);
    } else {
        printf('Default event-based hold is not enabled for ' . $bucketName . PHP_EOL);
    }
}

Python

如需了解详情,请参阅 Cloud Storage Python API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

from google.cloud import storage


def get_default_event_based_hold(bucket_name):
    """Gets the default event based hold on a given bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)

    if bucket.default_event_based_hold:
        print(f"Default event-based hold is enabled for {bucket_name}")
    else:
        print(
            f"Default event-based hold is not enabled for {bucket_name}"
        )

Ruby

如需了解详情,请参阅 Cloud Storage Ruby API 参考文档

如需向 Cloud Storage 进行身份验证,请设置应用默认凭证。如需了解详情,请参阅为客户端库设置身份验证

def get_default_event_based_hold bucket_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name

  if bucket.default_event_based_hold?
    puts "Default event-based hold is enabled for #{bucket_name}."
  else
    puts