Menetapkan dan mengelola kebijakan IAM di bucket

Overview

Halaman ini menjelaskan cara menetapkan kebijakan Identity and Access Management (IAM) di bucket, sehingga Anda dapat mengontrol akses ke objek dan folder terkelola dalam bucket tersebut.

Jika Anda mencari metode kontrol akses lainnya, lihat resource berikut:

• Untuk mempelajari cara mendapatkan kontrol yang lebih terperinci atas grup objek, lihat Menetapkan dan mengelola kebijakan IAM di folder terkelola.

• Untuk mengetahui cara alternatif guna mengontrol akses ke setiap objek di bucket Anda, lihat Daftar Kontrol Akses.

• Untuk informasi selengkapnya tentang cara mengontrol akses ke resource Cloud Storage, baca Ringkasan Kontrol Akses.

Catatan: Kebijakan IAM tidak dapat dikelola menggunakan XML API.

Peran yang diperlukan

Untuk mendapatkan izin yang diperlukan guna menetapkan dan mengelola kebijakan IAM untuk bucket, minta administrator untuk memberi Anda peran IAM Storage Admin (roles/storage.admin) untuk bucket tersebut.

Peran ini berisi izin berikut, yang diperlukan untuk menetapkan dan mengelola kebijakan IAM untuk bucket:

• storage.buckets.get

• storage.buckets.getIamPolicy

• storage.buckets.setIamPolicy

• storage.buckets.update

• storage.buckets.list

  • Izin ini hanya diperlukan jika Anda berencana menggunakan Konsol Google Cloud untuk melakukan tugas di halaman ini.

Anda juga bisa mendapatkan izin ini dengan peran khusus.

Menambahkan akun utama ke kebijakan level bucket

Untuk daftar peran yang terkait dengan Cloud Storage, lihat Peran IAM. Untuk mengetahui informasi tentang entitas yang Anda beri peran IAM, lihat ID utama.

Konsol

1. Di Konsol Google Cloud, buka halaman Bucket Cloud Storage.
   

   Buka Bucket

2. Pada daftar bucket, klik nama bucket tempat Anda ingin memberi akun utama peran.

3. Pilih tab Izin di bagian atas halaman.

4. Klik tombol Berikan akses.

   Dialog Add principals akan muncul.

5. Di kolom Akun utama baru, masukkan satu atau beberapa identitas yang memerlukan akses ke bucket Anda.

6. Pilih satu (atau beberapa) peran dari menu drop-down Pilih peran. Peran yang Anda pilih akan muncul di panel dengan deskripsi singkat tentang izin yang diberikan.

7. Klik Simpan.

Untuk mempelajari cara mendapatkan informasi error mendetail tentang operasi Cloud Storage yang gagal di Konsol Google Cloud, lihat Pemecahan masalah.

Command line

Gunakan perintah buckets add-iam-policy-binding:

gcloud storage buckets add-iam-policy-binding gs://BUCKET_NAME --member=PRINCIPAL_IDENTIFIER --role=IAM_ROLE

Dengan keterangan:

• BUCKET_NAME adalah nama bucket yang aksesnya Anda berikan ke akun utama. Contohnya, my-bucket.

• PRINCIPAL_IDENTIFIER mengidentifikasi siapa yang Anda beri akses bucket. Contohnya, user:[e-mail]. Untuk daftar format ID utama, lihat ID utama.

• IAM_ROLE adalah peran IAM yang Anda berikan ke akun utama. Misalnya, roles/storage.objectViewer.

Library klien

C++

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C++ API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& role, std::string const& member) {
  auto policy = client.GetNativeBucketIamPolicy(
      bucket_name, gcs::RequestedPolicyVersion(3));

  if (!policy) throw std::move(policy).status();

  policy->set_version(3);
  for (auto& binding : policy->bindings()) {
    if (binding.role() != role || binding.has_condition()) {
      continue;
    }
    auto& members = binding.members();
    if (std::find(members.begin(), members.end(), member) == members.end()) {
      members.emplace_back(member);
    }
  }

  auto updated = client.SetNativeBucketIamPolicy(bucket_name, *policy);
  if (!updated) throw std::move(updated).status();

  std::cout << "Updated IAM policy bucket " << bucket_name
            << ". The new policy is " << *updated << "\n";
}

C#

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C# API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

public class AddBucketIamMemberSample
{
    public Policy AddBucketIamMember(
        string bucketName = "your-unique-bucket-name",
        string role = "roles/storage.objectViewer",
        string member = "serviceAccount:[e-mail]")
    {
        var storage = StorageClient.Create();
        var policy = storage.GetBucketIamPolicy(bucketName, new GetBucketIamPolicyOptions
        {
            RequestedPolicyVersion = 3
        });
        // Set the policy schema version. For more information, please refer to https://cloud.google.com/iam/docs/policies#versions.
        policy.Version = 3;

        Policy.BindingsData bindingToAdd = new Policy.BindingsData
        {
            Role = role,
            Members = new List<string> { member }
        };

        policy.Bindings.Add(bindingToAdd);
        var bucketIamPolicy = storage.SetBucketIamPolicy(bucketName, policy);
        Console.WriteLine($"Added {member} with role {role} " + $"to {bucketName}");
        return bucketIamPolicy;
    }
}

Go

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Go API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

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

// addBucketIAMMember adds the bucket IAM member to permission role.
func addBucketIAMMember(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)
	policy, err := bucket.IAM().Policy(ctx)
	if err != nil {
		return fmt.Errorf("Bucket(%q).IAM().Policy: %w", bucketName, err)
	}
	// Other valid prefixes are "serviceAccount:", "user:"
	// See the documentation for more values.
	// https://cloud.google.com/storage/docs/access-control/iam
	identity := "group:[e-mail]"
	var role iam.RoleName = "roles/storage.objectViewer"

	policy.Add(identity, role)
	if err := bucket.IAM().SetPolicy(ctx, policy); err != nil {
		return fmt.Errorf("Bucket(%q).IAM().SetPolicy: %w", bucketName, err)
	}
	// NOTE: It may be necessary to retry this operation if IAM policies are
	// being modified concurrently. SetPolicy will return an error if the policy
	// was modified since it was retrieved.
	fmt.Fprintf(w, "Added %v with role %v to %v\n", identity, role, bucketName)
	return nil
}

Java

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Java API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

import com.google.cloud.Binding;
import com.google.cloud.Policy;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class AddBucketIamMember {
  /** Example of adding a member to the Bucket-level IAM */
  public static void addBucketIamMember(String projectId, String bucketName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

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

    // For more information please read:
    // https://cloud.google.com/storage/docs/access-control/iam
    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    Policy originalPolicy =
        storage.getIamPolicy(bucketName, Storage.BucketSourceOption.requestedPolicyVersion(3));

    String role = "roles/storage.objectViewer";
    String member = "group:[e-mail]";

    // getBindingsList() returns an ImmutableList and copying over to an ArrayList so it's mutable.
    List<Binding> bindings = new ArrayList(originalPolicy.getBindingsList());

    // Create a new binding using role and member
    Binding.Builder newMemberBindingBuilder = Binding.newBuilder();
    newMemberBindingBuilder.setRole(role).setMembers(Arrays.asList(member));
    bindings.add(newMemberBindingBuilder.build());

    // Update policy to add member
    Policy.Builder updatedPolicyBuilder = originalPolicy.toBuilder();
    updatedPolicyBuilder.setBindings(bindings).setVersion(3);
    Policy updatedPolicy = storage.setIamPolicy(bucketName, updatedPolicyBuilder.build());

    System.out.printf("Added %s with role %s to %s\n", member, role, bucketName);
  }
}

Node.js

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Node.js API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

// The role to grant
// const roleName = 'roles/storage.objectViewer';

// The members to grant the new role to
// const members = [
//   'user:[e-mail]',
//   'group:[e-mail]',
// ];

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

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

async function addBucketIamMember() {
  // Get a reference to a Google Cloud Storage bucket
  const bucket = storage.bucket(bucketName);

  // For more information please read:
  // https://cloud.google.com/storage/docs/access-control/iam
  const [policy] = await bucket.iam.getPolicy({requestedPolicyVersion: 3});

  // Adds the new roles to the bucket's IAM policy
  policy.bindings.push({
    role: roleName,
    members: members,
  });

  // Updates the bucket's IAM policy
  await bucket.iam.setPolicy(policy);

  console.log(
    `Added the following member(s) with role ${roleName} to ${bucketName}:`
  );

  members.forEach(member => {
    console.log(`  ${member}`);
  });
}

addBucketIamMember().catch(console.error);

PHP

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage PHP API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

use Google\Cloud\Storage\StorageClient;

/**
 * Adds a new member / role IAM pair to a given Cloud Storage bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $role The role to which the given member should be added.
 *        (e.g. 'roles/storage.objectViewer')
 * @param string[] $members The member(s) to be added to the role.
 *        (e.g. ['group:[e-mail]'])
 */
function add_bucket_iam_member(string $bucketName, string $role, array $members): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    $policy = $bucket->iam()->policy(['requestedPolicyVersion' => 3]);
    $policy['version'] = 3;

    $policy['bindings'][] = [
        'role' => $role,
        'members' => $members
    ];

    $bucket->iam()->setPolicy($policy);

    printf('Added the following member(s) to role %s for bucket %s' . PHP_EOL, $role, $bucketName);
    foreach ($members as $member) {
        printf('    %s' . PHP_EOL, $member);
    }
}

Python

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Python API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

from google.cloud import storage


def add_bucket_iam_member(bucket_name, role, member):
    """Add a new member to an IAM Policy"""
    # bucket_name = "your-bucket-name"
    # role = "IAM role, e.g., roles/storage.objectViewer"
    # member = "IAM identity, e.g., user: [e-mail]"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)

    policy = bucket.get_iam_policy(requested_policy_version=3)

    policy.bindings.append({"role": role, "members": {member}})

    bucket.set_iam_policy(policy)

    print(f"Added {member} with role {role} to {bucket_name}.")

Ruby

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Ruby API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

def add_bucket_iam_member 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

  role   = "roles/storage.objectViewer"
  member = "group:[e-mail]"

  bucket.policy requested_policy_version: 3 do |policy|
    policy.bindings.insert role: role, members: [member]
  end

  puts "Added #{member} with role #{role} to #{bucket_name}"
end

REST API

JSON

1. Menginstal dan melakukan inisialisasi gcloud CLI , yang memungkinkan Anda membuat token akses untuk header Authorization.

2. Buat file JSON yang berisi informasi berikut:

   {
   "bindings":[
     {
       "role": "IAM_ROLE",
       "members":[
         "PRINCIPAL_IDENTIFIER"
       ]
     }
   ]
   }

   Dengan keterangan:

   • IAM_ROLE adalah peran IAM yang Anda berikan. Contohnya, roles/storage.objectViewer

   • PRINCIPAL_IDENTIFIER mengidentifikasi siapa yang Anda beri akses bucket. Contohnya, user:[e-mail]. Untuk daftar format ID utama, lihat ID utama.

3. Gunakan cURL untuk memanggil JSON API dengan permintaan PUT setIamPolicy:

   curl -X PUT --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/iam"

   Dengan keterangan:

   • JSON_FILE_NAME adalah jalur untuk file yang Anda buat di Langkah 2.

   • BUCKET_NAME adalah nama bucket yang ingin Anda beri akses utama. Contoh, my-bucket.

Melihat kebijakan IAM untuk bucket

Konsol

1. Di Konsol Google Cloud, buka halaman Bucket Cloud Storage.
   

   Buka Bucket

2. Dalam daftar bucket, klik nama bucket yang kebijakannya ingin Anda lihat.

3. Di halaman Detail bucket, klik tab Permissions.

   Kebijakan IAM yang berlaku untuk bucket akan muncul di bagian Izin.

4. Opsional: Gunakan panel Filter untuk memfilter hasil.

   Jika Anda menelusuri berdasarkan akun utama, hasil Anda akan menampilkan setiap peran yang dimiliki akun utama.

Command line

Gunakan perintah buckets get-iam-policy:

gcloud storage buckets get-iam-policy gs://BUCKET_NAME

Dengan BUCKET_NAME adalah nama bucket yang ingin Anda lihat kebijakan IAM-nya. Contohnya, my-bucket.

Library klien

C++

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C++ API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name) {
  auto policy = client.GetNativeBucketIamPolicy(
      bucket_name, gcs::RequestedPolicyVersion(3));

  if (!policy) throw std::move(policy).status();
  std::cout << "The IAM policy for bucket " << bucket_name << " is "
            << *policy << "\n";
}

C#

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C# API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

public class ViewBucketIamMembersSample
{
    public Policy ViewBucketIamMembers(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var policy = storage.GetBucketIamPolicy(bucketName, new GetBucketIamPolicyOptions
        {
            RequestedPolicyVersion = 3
        });

        foreach (var binding in policy.Bindings)
        {
            Console.WriteLine($"Role: {binding.Role}");
            Console.WriteLine("Members:");
            foreach (var member in binding.Members)
            {
                Console.WriteLine($"{member}");
            }
        }
        return policy;
    }
}

Go

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Go API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

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

// getBucketPolicy gets the bucket IAM policy.
func getBucketPolicy(w io.Writer, bucketName string) (*iam.Policy3, 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()

	policy, err := client.Bucket(bucketName).IAM().V3().Policy(ctx)
	if err != nil {
		return nil, fmt.Errorf("Bucket(%q).IAM().V3().Policy: %w", bucketName, err)
	}
	for _, binding := range policy.Bindings {
		fmt.Fprintf(w, "%q: %q (condition: %v)\n", binding.Role, binding.Members, binding.Condition)
	}
	return policy, nil
}

Java

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Java API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

import com.google.cloud.Binding;
import com.google.cloud.Policy;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

public class ListBucketIamMembers {
  public static void listBucketIamMembers(String projectId, String bucketName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

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

    // For more information please read:
    // https://cloud.google.com/storage/docs/access-control/iam
    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    Policy policy =
        storage.getIamPolicy(bucketName, Storage.BucketSourceOption.requestedPolicyVersion(3));

    // Print binding information
    for (Binding binding : policy.getBindingsList()) {
      System.out.printf("Role: %s Members: %s\n", binding.getRole(), binding.getMembers());

      // Print condition if one is set
      boolean bindingIsConditional = binding.getCondition() != null;
      if (bindingIsConditional) {
        System.out.printf("Condition Title: %s\n", binding.getCondition().getTitle());
        System.out.printf("Condition Description: %s\n", binding.getCondition().getDescription());
        System.out.printf("Condition Expression: %s\n", binding.getCondition().getExpression());
      }
    }
  }
}

Node.js

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Node.js API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

/**
 * 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 viewBucketIamMembers() {
  // For more information please read:
  // https://cloud.google.com/storage/docs/access-control/iam
  const results = await storage
    .bucket(bucketName)
    .iam.getPolicy({requestedPolicyVersion: 3});

  const bindings = results[0].bindings;

  console.log(`Bindings for bucket ${bucketName}:`);
  for (const binding of bindings) {
    console.log(`  Role: ${binding.role}`);
    console.log('  Members:');

    const members = binding.members;
    for (const member of members) {
      console.log(`    ${member}`);
    }

    const condition = binding.condition;
    if (condition) {
      console.log('  Condition:');
      console.log(`    Title: ${condition.title}`);
      console.log(`    Description: ${condition.description}`);
      console.log(`    Expression: ${condition.expression}`);
    }
  }
}

viewBucketIamMembers().catch(console.error);

PHP

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage PHP API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

use Google\Cloud\Storage\StorageClient;

/**
 * View Bucket IAM members for a given Cloud Storage bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function view_bucket_iam_members(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    $policy = $bucket->iam()->policy(['requestedPolicyVersion' => 3]);

    printf('Printing Bucket IAM members for Bucket: %s' . PHP_EOL, $bucketName);
    printf(PHP_EOL);

    foreach ($policy['bindings'] as $binding) {
        printf('Role: %s' . PHP_EOL, $binding['role']);
        printf('Members:' . PHP_EOL);
        foreach ($binding['members'] as $member) {
            printf('  %s' . PHP_EOL, $member);
        }

        if (isset($binding['condition'])) {
            $condition = $binding['condition'];
            printf('  with condition:' . PHP_EOL);
            printf('    Title: %s' . PHP_EOL, $condition['title']);
            printf('    Description: %s' . PHP_EOL, $condition['description']);
            printf('    Expression: %s' . PHP_EOL, $condition['expression']);
        }
        printf(PHP_EOL);
    }
}

Python

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Python API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

from google.cloud import storage


def view_bucket_iam_members(bucket_name):
    """View IAM Policy for a bucket"""
    # bucket_name = "your-bucket-name"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)

    policy = bucket.get_iam_policy(requested_policy_version=3)

    for binding in policy.bindings:
        print(f"Role: {binding['role']}, Members: {binding['members']}")

Ruby

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Ruby API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

def view_bucket_iam_members 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

  policy = bucket.policy requested_policy_version: 3
  policy.bindings.each do |binding|
    puts "Role: #{binding.role}"
    puts "Members: #{binding.members}"

    # if a conditional binding exists print the condition.
    if binding.condition
      puts "Condition Title: #{binding.condition.title}"
      puts "Condition Description: #{binding.condition.description}"
      puts "Condition Expression: #{binding.condition.expression}"
    end
  end
end

REST API

JSON

1. Menginstal dan melakukan inisialisasi gcloud CLI , yang memungkinkan Anda membuat token akses untuk header Authorization.

2. Gunakan cURL untuk memanggil JSON API dengan permintaan GET getIamPolicy:

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/iam"

   Dengan BUCKET_NAME adalah nama bucket yang ingin Anda lihat kebijakan IAM-nya. Contoh, my-bucket.

Catatan: Beberapa peran mungkin tidak muncul di jendela izin bucket. Jika Anda memberikan peran di level project, peran tersebut tidak akan muncul di jendela izin bucket, meskipun jika pengguna dengan peran tersebut memiliki akses ke bucket Anda. Untuk melihat izin level project ini, buka layar IAM & Admin.

Menghapus akun utama dari kebijakan level bucket

Konsol

1. Di Konsol Google Cloud, buka halaman Bucket Cloud Storage.
   

   Buka Bucket

2. Dalam daftar bucket, klik nama bucket tempat Anda ingin menghapus peran akun utama.

3. Di halaman Detail bucket, klik tab Permissions.

   Kebijakan IAM yang berlaku untuk bucket akan muncul di bagian Izin.

4. Di tab Lihat menurut akun utama, centang kotak untuk akun utama yang ingin Anda hapus.

5. Klik tombol - Hapus akses.

6. Di jendela overlay yang muncul, klik Konfirmasi.

Untuk mempelajari cara mendapatkan informasi error mendetail tentang operasi Cloud Storage yang gagal di Konsol Google Cloud, lihat Pemecahan masalah.

Command line

Gunakan perintah buckets remove-iam-policy-binding:

gcloud storage buckets remove-iam-policy-binding  gs://BUCKET_NAME --member=PRINCIPAL_IDENTIFIER --role=IAM_ROLE

Dengan keterangan:

• BUCKET_NAME adalah nama bucket yang aksesnya akan dicabut. Contohnya, my-bucket.

• PRINCIPAL_IDENTIFIER mengidentifikasi pihak yang Anda cabut aksesnya. Contohnya, user:[e-mail]. Untuk daftar format ID utama, lihat ID utama.

• IAM_ROLE adalah peran IAM yang Anda cabut. Misalnya, roles/storage.objectViewer.

Library klien

C++

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C++ API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& role, std::string const& member) {
  auto policy = client.GetNativeBucketIamPolicy(
      bucket_name, gcs::RequestedPolicyVersion(3));
  if (!policy) throw std::move(policy).status();

  policy->set_version(3);
  std::vector<google::cloud::storage::NativeIamBinding> updated_bindings;
  for (auto& binding : policy->bindings()) {
    auto& members = binding.members();
    if (binding.role() == role && !binding.has_condition()) {
      members.erase(std::remove(members.begin(), members.end(), member),
                    members.end());
    }
    if (!members.empty()) {
      updated_bindings.emplace_back(std::move(binding));
    }
  }
  policy->bindings() = std::move(updated_bindings);

  auto updated = client.SetNativeBucketIamPolicy(bucket_name, *policy);
  if (!updated) throw std::move(updated).status();

  std::cout << "Updated IAM policy bucket " << bucket_name
            << ". The new policy is " << *updated << "\n";
}

C#

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C# API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

public class RemoveBucketIamMemberSample
{
    public void RemoveBucketIamMember(
        string bucketName = "your-unique-bucket-name",
        string role = "roles/storage.objectViewer",
        string member = "serviceAccount:[e-mail]")
    {
        var storage = StorageClient.Create();
        var policy = storage.GetBucketIamPolicy(bucketName, new GetBucketIamPolicyOptions
        {
            RequestedPolicyVersion = 3
        });
        // Set the policy schema version. For more information, please refer to https://cloud.google.com/iam/docs/policies#versions.
        policy.Version = 3;

        foreach (var binding in policy.Bindings.Where(c => c.Role == role).ToList())
        {
            // Remove the role/member combo from the IAM policy.
            binding.Members = binding.Members.Where(m => m != member).ToList();
            // Remove role if it contains no members.
            if (binding.Members.Count == 0)
            {
                policy.Bindings.Remove(binding);
            }
        }
        // Set the modified IAM policy to be the current IAM policy.
        storage.SetBucketIamPolicy(bucketName, policy);
        Console.WriteLine($"Removed {member} with role {role} from {bucketName}");
    }
}

Go

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Go API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

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

// removeBucketIAMMember removes the bucket IAM member.
func removeBucketIAMMember(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)
	policy, err := bucket.IAM().Policy(ctx)
	if err != nil {
		return fmt.Errorf("Bucket(%q).IAM().Policy: %w", bucketName, err)
	}
	// Other valid prefixes are "serviceAccount:", "user:"
	// See the documentation for more values.
	// https://cloud.google.com/storage/docs/access-control/iam
	// member string, role iam.RoleName
	identity := "group:[e-mail]"
	var role iam.RoleName = "roles/storage.objectViewer"

	policy.Remove(identity, role)
	if err := bucket.IAM().SetPolicy(ctx, policy); err != nil {
		return fmt.Errorf("Bucket(%q).IAM().SetPolicy: %w", bucketName, err)
	}
	// NOTE: It may be necessary to retry this operation if IAM policies are
	// being modified concurrently. SetPolicy will return an error if the policy
	// was modified since it was retrieved.
	fmt.Fprintf(w, "Removed %v with role %v from %v\n", identity, role, bucketName)
	return nil
}

Java

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Java API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

import com.google.cloud.Binding;
import com.google.cloud.Policy;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.ArrayList;
import java.util.List;

public class RemoveBucketIamMember {
  public static void removeBucketIamMember(String projectId, String bucketName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

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

    // For more information please read:
    // https://cloud.google.com/storage/docs/access-control/iam
    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    Policy originalPolicy =
        storage.getIamPolicy(bucketName, Storage.BucketSourceOption.requestedPolicyVersion(3));

    String role = "roles/storage.objectViewer";
    String member = "group:[e-mail]";

    // getBindingsList() returns an ImmutableList and copying over to an ArrayList so it's mutable.
    List<Binding> bindings = new ArrayList(originalPolicy.getBindingsList());

    // Remove role-member binding without a condition.
    for (int index = 0; index < bindings.size(); index++) {
      Binding binding = bindings.get(index);
      boolean foundRole = binding.getRole().equals(role);
      boolean foundMember = binding.getMembers().contains(member);
      boolean bindingIsNotConditional = binding.getCondition() == null;

      if (foundRole && foundMember && bindingIsNotConditional) {
        bindings.set(index, binding.toBuilder().removeMembers(member).build());
        break;
      }
    }

    // Update policy to remove member
    Policy.Builder updatedPolicyBuilder = originalPolicy.toBuilder();
    updatedPolicyBuilder.setBindings(bindings).setVersion(3);
    Policy updatedPolicy = storage.setIamPolicy(bucketName, updatedPolicyBuilder.build());

    System.out.printf("Removed %s with role %s from %s\n", member, role, bucketName);
  }
}

Node.js

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Node.js API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

// The role to revoke
// const roleName = 'roles/storage.objectViewer';

// The members to revoke the roles from
// const members = [
//   'user:[e-mail]',
//   'group:[e-mail]',
// ];

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

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

async function removeBucketIamMember() {
  // Get a reference to a Google Cloud Storage bucket
  const bucket = storage.bucket(bucketName);

  // For more information please read:
  // https://cloud.google.com/storage/docs/access-control/iam
  const [policy] = await bucket.iam.getPolicy({requestedPolicyVersion: 3});

  // Finds and updates the appropriate role-member group, without a condition.
  const index = policy.bindings.findIndex(
    binding => binding.role === roleName && !binding.condition
  );

  const role = policy.bindings[index];
  if (role) {
    role.members = role.members.filter(
      member => members.indexOf(member) === -1
    );

    // Updates the policy object with the new (or empty) role-member group
    if (role.members.length === 0) {
      policy.bindings.splice(index, 1);
    } else {
      policy.bindings.index = role;
    }

    // Updates the bucket's IAM policy
    await bucket.iam.setPolicy(policy);
  } else {
    // No matching role-member group(s) were found
    throw new Error('No matching role-member group(s) found.');
  }

  console.log(
    `Removed the following member(s) with role ${roleName} from ${bucketName}:`
  );
  members.forEach(member => {
    console.log(`  ${member}`);
  });
}

removeBucketIamMember().catch(console.error);

PHP

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage PHP API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

use Google\Cloud\Storage\StorageClient;

/**
 * Removes a member / role IAM pair from a given Cloud Storage bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $role The role from which the specified member should be removed.
 *        (e.g. 'roles/storage.objectViewer')
 * @param string $member The member to be removed from the specified role.
 *        (e.g. 'group:[e-mail]')
 */
function remove_bucket_iam_member(string $bucketName, string $role, string $member): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $iam = $bucket->iam();
    $policy = $iam->policy(['requestedPolicyVersion' => 3]);
    $policy['version'] = 3;

    foreach ($policy['bindings'] as $i => $binding) {
        // This example only removes member from bindings without a condition.
        if ($binding['role'] == $role && !isset($binding['condition'])) {
            $key = array_search($member, $binding['members']);
            if ($key !== false) {
                unset($binding['members'][$key]);

                // If the last member is removed from the binding, clean up the
                // binding.
                if (count($binding['members']) == 0) {
                    unset($policy['bindings'][$i]);
                    // Ensure array keys are sequential, otherwise JSON encodes
                    // the array as an object, which fails when calling the API.
                    $policy['bindings'] = array_values($policy['bindings']);
                } else {
                    // Ensure array keys are sequential, otherwise JSON encodes
                    // the array as an object, which fails when calling the API.
                    $binding['members'] = array_values($binding['members']);
                    $policy['bindings'][$i] = $binding;
                }

                $iam->setPolicy($policy);
                printf('User %s removed from role %s for bucket %s' . PHP_EOL, $member, $role, $bucketName);
                return;
            }
        }
    }

    throw new \RuntimeException('No matching role-member group(s) found.');
}

Python

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Python API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

from google.cloud import storage


def remove_bucket_iam_member(bucket_name, role, member):
    """Remove member from bucket IAM Policy"""
    # bucket_name = "your-bucket-name"
    # role = "IAM role, e.g. roles/storage.objectViewer"
    # member = "IAM identity, e.g. user: [e-mail]"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)

    policy = bucket.get_iam_policy(requested_policy_version=3)

    for binding in policy.bindings:
        print(binding)
        if binding["role"] == role and binding.get("condition") is None:
            binding["members"].discard(member)

    bucket.set_iam_policy(policy)

    print(f"Removed {member} with role {role} from {bucket_name}.")

Ruby

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Ruby API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

  # For more information please read: https://cloud.google.com/storage/docs/access-control/iam

  require "google/cloud/storage"

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

  role   = "roles/storage.objectViewer"
  member = "group:[e-mail]"

  bucket.policy requested_policy_version: 3 do |policy|
    policy.bindings.each do |binding|
      if binding.role == role && binding.condition.nil?
        binding.members.delete member
      end
    end
  end

  puts "Removed #{member} with role #{role} from #{bucket_name}"
end

REST API

JSON

1. Menginstal dan melakukan inisialisasi gcloud CLI , yang memungkinkan Anda membuat token akses untuk header Authorization.

2. Dapatkan kebijakan yang sudah ada dan terapkan ke bucket Anda. Untuk melakukannya, gunakan cURL untuk memanggil JSON API dengan permintaan GET getIamPolicy:

   curl -X GET \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/iam"

   Dengan BUCKET_NAME adalah nama bucket yang ingin Anda lihat kebijakan IAM-nya. Contoh, my-bucket.

3. Buat file JSON berisi kebijakan yang Anda dapat di langkah sebelumnya.

4. Edit file JSON untuk menghapus akun utama dari kebijakan.

5. Gunakan cURL untuk memanggil JSON API dengan permintaan PUT setIamPolicy:

   curl -X PUT --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/iam"

   Dengan keterangan:

   • JSON_FILE_NAME adalah jalur untuk file yang Anda buat di Langkah 3.

   • BUCKET_NAME adalah nama bucket yang aksesnya ingin dihapus. Contohnya, my-bucket.

Penting: Biasanya perlu waktu sekitar satu menit hingga dampak pencabutan akses berlaku. Dalam beberapa kasus, hal ini mungkin memerlukan waktu lebih lama. Jika Anda menghapus akses pengguna, perubahan ini langsung diterapkan dalam metadata; tetapi, pengguna mungkin masih memiliki akses ke objek tersebut dalam waktu yang singkat.

Menggunakan IAM Conditions pada bucket

Bagian berikut menunjukkan cara menambahkan dan menghapus IAM Conditions di bucket Anda. Untuk melihat IAM Conditions bucket Anda, lihat Melihat kebijakan IAM untuk bucket. Untuk informasi selengkapnya tentang penggunaan IAM Conditions dengan Cloud Storage, lihat Kondisi.

Anda harus mengaktifkan akses level bucket yang seragam di bucket sebelum menambahkan kondisi.

Menetapkan kondisi baru pada bucket

Konsol

1. Di Konsol Google Cloud, buka halaman Bucket Cloud Storage.
   

   Buka Bucket

2. Dalam daftar bucket, klik nama bucket yang ingin Anda tambahkan kondisi barunya.

3. Di halaman Detail bucket, klik tab Permissions.

   Kebijakan IAM yang berlaku untuk bucket akan muncul di bagian Izin.

4. Klik + Berikan akses.

5. Bagi Akun utama baru, isi akun utama yang ingin Anda beri akses ke bucket.

6. Menerapkan kondisi untuk setiap peran:

   1. Pilih Peran untuk diberikan ke akun utama.

   2. Klik Tambahkan kondisi untuk membuka formulir Edit kondisi.

   3. Isi Judul kondisi. Kolom Deskripsi bersifat opsional.

   4. Gunakan Pembuat kondisi untuk membuat kondisi secara visual, atau gunakan tab Editor kondisi untuk memasukkan ekspresi CEL.

   5. Klik Save untuk kembali ke formulir Tambahkan akun utama. Untuk menambahkan beberapa peran, klik Tambahkan peran lain.

7. Klik Simpan.

Untuk mempelajari cara mendapatkan informasi error mendetail tentang operasi Cloud Storage yang gagal di Konsol Google Cloud, lihat Pemecahan masalah.

Command line

1. Buat file JSON atau YAML yang menentukan kondisi, termasuk title kondisi, expression logika berbasis atribut untuk kondisi, dan, jika Anda mau, description kondisi tersebut.

   Perhatikan bahwa Cloud Storage hanya mendukung atribut tanggal/waktu, jenis resource, dan nama resource pada expression.

2. Gunakan perintah buckets add-iam-policy-binding dengan flag --condition-from-file:

gcloud storage buckets add-iam-policy-binding  gs://BUCKET_NAME --member=PRINCIPAL_IDENTIFIER --role=IAM_ROLE --condition-from-file=CONDITION_FILE

Dengan keterangan:

• BUCKET_NAME adalah nama bucket yang aksesnya Anda berikan ke akun utama. Contohnya, my-bucket.

• PRINCIPAL_IDENTIFIER mengidentifikasi pada siapa kondisi berlaku. Contohnya, user:[e-mail]. Untuk daftar format ID utama, lihat ID utama.

• IAM_ROLE adalah peran IAM yang Anda berikan ke akun utama. Contohnya, roles/storage.objectViewer.

• CONDITION_FILE adalah file yang Anda buat di langkah sebelumnya.

Atau, Anda dapat menyertakan kondisi secara langsung dalam perintah dengan flag --condition, bukan flag --condition-from-file.

Library klien

C++

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C++ API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& role, std::string const& member,
   std::string const& condition_title,
   std::string const& condition_description,
   std::string const& condition_expression) {
  auto policy = client.GetNativeBucketIamPolicy(
      bucket_name, gcs::RequestedPolicyVersion(3));
  if (!policy) throw std::move(policy).status();

  policy->set_version(3);
  policy->bindings().emplace_back(gcs::NativeIamBinding(
      role, {member},
      gcs::NativeExpression(condition_expression, condition_title,
                            condition_description)));

  auto updated = client.SetNativeBucketIamPolicy(bucket_name, *policy);
  if (!updated) throw std::move(updated).status();

  std::cout << "Updated IAM policy bucket " << bucket_name
            << ". The new policy is " << *updated << "\n";

  std::cout << "Added member " << member << " with role " << role << " to "
            << bucket_name << ":\n";
  std::cout << "with condition:\n"
            << "\t Title: " << condition_title << "\n"
            << "\t Description: " << condition_description << "\n"
            << "\t Expression: " << condition_expression << "\n";
}

C#

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C# API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

public class AddBucketConditionalIamBindingSample
{
    /// <summary>
    /// Adds a conditional Iam policy to a bucket.
    /// </summary>
    /// <param name="bucketName">The name of the bucket.</param>
    /// <param name="role">The role that members may assume.</param>
    /// <param name="member">The identifier of the member who may assume the provided role.</param>
    /// <param name="title">Title for the expression.</param>
    /// <param name="description">Description of the expression.</param>
    /// <param name="expression">Describes the conditions that need to be met for the policy to be applied.
    /// It's represented as a string using Common Expression Language syntax.</param>
    public Policy AddBucketConditionalIamBinding(
        string bucketName = "your-unique-bucket-name",
        string role = "roles/storage.objectViewer",
        string member = "serviceAccount:[e-mail]",
        string title = "title",
        string description = "description",
        string expression = "resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")")
    {
        var storage = StorageClient.Create();
        var policy = storage.GetBucketIamPolicy(bucketName, new GetBucketIamPolicyOptions
        {
            RequestedPolicyVersion = 3
        });
        // Set the policy schema version. For more information, please refer to https://cloud.google.com/iam/docs/policies#versions.
        policy.Version = 3;
        Policy.BindingsData bindingToAdd = new Policy.BindingsData
        {
            Role = role,
            Members = new List<string> { member },
            Condition = new Expr
            {
                Title = title,
                Description = description,
                Expression = expression
            }
        };

        policy.Bindings.Add(bindingToAdd);

        var bucketIamPolicy = storage.SetBucketIamPolicy(bucketName, policy);
        Console.WriteLine($"Added {member} with role {role} " + $"to {bucketName}");
        return bucketIamPolicy;
    }
}

Go

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Go API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

	"cloud.google.com/go/iam/apiv1/iampb"
	"cloud.google.com/go/storage"
	"google.golang.org/genproto/googleapis/type/expr"
)

// addBucketConditionalIAMBinding adds bucket conditional IAM binding.
func addBucketConditionalIAMBinding(w io.Writer, bucketName, role, member, title, description, expression string) error {
	// bucketName := "bucket-name"
	// role := "bucket-level IAM role"
	// member := "bucket-level IAM member"
	// title := "condition title"
	// description := "condition description"
	// expression := "condition expression"
	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)
	policy, err := bucket.IAM().V3().Policy(ctx)
	if err != nil {
		return fmt.Errorf("Bucket(%q).IAM().V3().Policy: %w", bucketName, err)
	}

	policy.Bindings = append(policy.Bindings, &iampb.Binding{
		Role:    role,
		Members: []string{member},
		Condition: &expr.Expr{
			Title:       title,
			Description: description,
			Expression:  expression,
		},
	})

	if err := bucket.IAM().V3().SetPolicy(ctx, policy); err != nil {
		return fmt.Errorf("Bucket(%q).IAM().V3().SetPolicy: %w", bucketName, err)
	}
	// NOTE: It may be necessary to retry this operation if IAM policies are
	// being modified concurrently. SetPolicy will return an error if the policy
	// was modified since it was retrieved.
	fmt.Fprintf(w, "Added %v with role %v to %v with condition %v %v %v\n", member, role, bucketName, title, description, expression)
	return nil
}

Java

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Java API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

import com.google.cloud.Binding;
import com.google.cloud.Condition;
import com.google.cloud.Policy;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class AddBucketIamConditionalBinding {
  /** Example of adding a conditional binding to the Bucket-level IAM */
  public static void addBucketIamConditionalBinding(String projectId, String bucketName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

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

    // For more information please read:
    // https://cloud.google.com/storage/docs/access-control/iam
    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    Policy originalPolicy =
        storage.getIamPolicy(bucketName, Storage.BucketSourceOption.requestedPolicyVersion(3));

    String role = "roles/storage.objectViewer";
    String member = "group:[e-mail]";

    // Create a condition
    String conditionTitle = "Title";
    String conditionDescription = "Description";
    String conditionExpression =
        "resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")";
    Condition.Builder conditionBuilder = Condition.newBuilder();
    conditionBuilder.setTitle(conditionTitle);
    conditionBuilder.setDescription(conditionDescription);
    conditionBuilder.setExpression(conditionExpression);

    // getBindingsList() returns an ImmutableList, we copy over to an ArrayList so it's mutable
    List<Binding> bindings = new ArrayList(originalPolicy.getBindingsList());

    // Add condition to a binding
    Binding.Builder newBindingBuilder =
        Binding.newBuilder()
            .setRole(role)
            .setMembers(Arrays.asList(member))
            .setCondition(conditionBuilder.build());
    bindings.add(newBindingBuilder.build());

    // Update policy with new conditional binding
    Policy.Builder updatedPolicyBuilder = originalPolicy.toBuilder();
    updatedPolicyBuilder.setBindings(bindings).setVersion(3);

    storage.setIamPolicy(bucketName, updatedPolicyBuilder.build());

    System.out.printf(
        "Added %s with role %s to %s with condition %s %s %s\n",
        member, role, bucketName, conditionTitle, conditionDescription, conditionExpression);
  }
}

Node.js

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Node.js API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

// The role to grant
// const roleName = 'roles/storage.objectViewer';

// The members to grant the new role to
// const members = [
//   'user:[e-mail]',
//   'group:[e-mail]',
// ];

// Create a condition
// const title = 'Title';
// const description = 'Description';
// const expression = 'resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")';

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

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

async function addBucketConditionalBinding() {
  // Get a reference to a Google Cloud Storage bucket
  const bucket = storage.bucket(bucketName);

  // Gets and updates the bucket's IAM policy
  const [policy] = await bucket.iam.getPolicy({requestedPolicyVersion: 3});

  // Set the policy's version to 3 to use condition in bindings.
  policy.version = 3;

  // Adds the new roles to the bucket's IAM policy
  policy.bindings.push({
    role: roleName,
    members: members,
    condition: {
      title: title,
      description: description,
      expression: expression,
    },
  });

  // Updates the bucket's IAM policy
  await bucket.iam.setPolicy(policy);

  console.log(
    `Added the following member(s) with role ${roleName} to ${bucketName}:`
  );

  members.forEach(member => {
    console.log(`  ${member}`);
  });

  console.log('with condition:');
  console.log(`  Title: ${title}`);
  console.log(`  Description: ${description}`);
  console.log(`  Expression: ${expression}`);
}

addBucketConditionalBinding().catch(console.error);

PHP

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage PHP API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

use Google\Cloud\Storage\StorageClient;

/**
 * Adds a conditional IAM binding to a bucket's IAM policy.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $role The role that will be given to members in this binding.
 *        (e.g. 'roles/storage.objectViewer')
 * @param string[] $members The member(s) associated with this binding.
 *        (e.g. ['group:[e-mail]'])
 * @param string $title The title of the condition. (e.g. 'Title')
 * @param string $description The description of the condition.
 *        (e.g. 'Condition Description')
 * @param string $expression The condition specified in CEL expression language.
 *        (e.g. 'resource.name.startsWith("projects/_/buckets/bucket-name/objects/prefix-a-")')
 *
 * To see how to express a condition in CEL, visit:
 * @see https://cloud.google.com/storage/docs/access-control/iam#conditions.
 */
function add_bucket_conditional_iam_binding(string $bucketName, string $role, array $members, string $title, string $description, string $expression): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    $policy = $bucket->iam()->policy(['requestedPolicyVersion' => 3]);

    $policy['version'] = 3;

    $policy['bindings'][] = [
        'role' => $role,
        'members' => $members,
        'condition' => [
            'title' => $title,
            'description' => $description,
            'expression' => $expression,
        ],
    ];

    $bucket->iam()->setPolicy($policy);

    printf('Added the following member(s) with role %s to %s:' . PHP_EOL, $role, $bucketName);
    foreach ($members as $member) {
        printf('    %s' . PHP_EOL, $member);
    }
    printf('with condition:' . PHP_EOL);
    printf('    Title: %s' . PHP_EOL, $title);
    printf('    Description: %s' . PHP_EOL, $description);
    printf('    Expression: %s' . PHP_EOL, $expression);
}

Python

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Python API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

from google.cloud import storage


def add_bucket_conditional_iam_binding(
    bucket_name, role, title, description, expression, members
):
    """Add a conditional IAM binding to a bucket's IAM policy."""
    # bucket_name = "your-bucket-name"
    # role = "IAM role, e.g. roles/storage.objectViewer"
    # members = {"IAM identity, e.g. user: [e-mail]}"
    # title = "Condition title."
    # description = "Condition description."
    # expression = "Condition expression."

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)

    policy = bucket.get_iam_policy(requested_policy_version=3)

    # Set the policy's version to 3 to use condition in bindings.
    policy.version = 3

    policy.bindings.append(
        {
            "role": role,
            "members": members,
            "condition": {
                "title": title,
                "description": description,
                "expression": expression,
            },
        }
    )

    bucket.set_iam_policy(policy)

    print(f"Added the following member(s) with role {role} to {bucket_name}:")

    for member in members:
        print(f"    {member}")

    print("with condition:")
    print(f"    Title: {title}")
    print(f"    Description: {description}")
    print(f"    Expression: {expression}")

Ruby

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Ruby API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

def add_bucket_conditional_iam_binding 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

  role        = "roles/storage.objectViewer"
  member      = "group:[e-mail]"
  title       = "Title"
  description = "Description"
  expression  = "resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")"

  bucket.policy requested_policy_version: 3 do |policy|
    policy.version = 3
    policy.bindings.insert(
      role:      role,
      members:   member,
      condition: {
        title:       title,
        description: description,
        expression:  expression
      }
    )
  end

  puts "Added #{member} with role #{role} to #{bucket_name} with condition #{title} #{description} #{expression}"
end

REST API

JSON

1. Menginstal dan melakukan inisialisasi gcloud CLI , yang memungkinkan Anda membuat token akses untuk header Authorization.

2. Gunakan permintaan GET getIamPolicy untuk menyimpan kebijakan IAM bucket ke file JSON sementara:

   curl \
   'https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/iam' \
   --header 'Authorization: Bearer $(gcloud auth print-access-token)' > tmp-policy.json

   Dengan BUCKET_NAME yang merupakan nama bucket yang relevan. Contoh, my-bucket.

3. Edit file tmp-policy.json di editor teks untuk menambahkan kondisi baru ke binding dalam kebijakan IAM:

   {
       "version": VERSION,
       "bindings": [
         {
           "role": "IAM_ROLE",
           "members": [
             "PRINCIPAL_IDENTIFIER"
           ],
           "condition": {
             "title": "TITLE",
             "description": "DESCRIPTION",
             "expression": "EXPRESSION"
           }
         }
       ],
       "etag": "ETAG"
   }

   Dengan keterangan:

   • VERSION adalah versi kebijakan IAM. Versi 3 diwajibkan untuk bucket dengan IAM Conditions.

   • IAM_ROLE adalah peran yang diberi kondisi. Contohnya, roles/storage.objectViewer.

   • PRINCIPAL_IDENTIFIER mengidentifikasi pada siapa kondisi berlaku. Contohnya, user:[e-mail]. Untuk daftar format ID utama, lihat ID utama.

   • TITLE adalah judul kondisi. Contohnya, expires in 2019.

   • DESCRIPTION adalah deskripsi opsional kondisi. Contohnya, Permission revoked on New Year's.

   • EXPRESSION adalah ekspresi logika berbasis atribut. Contohnya, request.time < timestamp(\"2019-01-01T00:00:00Z\"). Untuk contoh ekspresi lainnya, lihat Referensi atribut kondisi. Perhatikan bahwa Cloud Storage hanya mendukung atribut tanggal/waktu, jenis resource, dan nama resource.

   Jangan ubah ETAG.

4. Gunakan permintaan PUT setIamPolicy untuk menetapkan kebijakan IAM yang dimodifikasi pada bucket:

   curl -X PUT --data-binary @tmp-policy.json \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/iam"

   Dengan BUCKET_NAME yang merupakan nama bucket yang relevan. Contoh, my-bucket.

Menghapus kondisi dari bucket

Konsol

1. Di Konsol Google Cloud, buka halaman Bucket Cloud Storage.
   

   Buka Bucket

2. Dalam daftar bucket, klik nama bucket tempat Anda ingin menghapus kondisi.

3. Di halaman Detail bucket, klik tab Permissions.

   Kebijakan IAM yang berlaku untuk bucket akan muncul di bagian Izin.

4. Klik ikon Edit untuk akun utama yang terkait dengan kondisi.

5. Di overlay Edit akses yang muncul, klik nama kondisi yang ingin dihapus.

6. Di overlay Edit kondisi yang muncul, klik Hapus, lalu Confirm.

7. Klik Simpan.

Untuk mempelajari cara mendapatkan informasi error mendetail tentang operasi Cloud Storage yang gagal di Konsol Google Cloud, lihat Pemecahan masalah.

Command line

1. Gunakan perintah buckets get-iam-policy untuk menyimpan kebijakan IAM bucket ke file JSON sementara.

   gcloud storage buckets get-iam-policy gs://BUCKET_NAME > tmp-policy.json

2. Edit file tmp-policy.json di editor teks untuk menghapus kondisi dari kebijakan IAM.

3. Gunakan buckets set-iam-policy untuk menetapkan kebijakan IAM yang dimodifikasi pada bucket.

   gcloud storage buckets set-iam-policy gs://BUCKET_NAME tmp-policy.json

Contoh kode

C++

Untuk informasi selengkapnya, lihat Dokumentasi referensi C++ API Cloud Storage.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& role, std::string const& condition_title,
   std::string const& condition_description,
   std::string const& condition_expression) {
  auto policy = client.GetNativeBucketIamPolicy(
      bucket_name, gcs::RequestedPolicyVersion(3));
  if (!policy) throw std::move(policy).status();

  policy->set_version(3);
  auto& bindings = policy->bindings();
  auto e = std::remove_if(
      bindings.begin(), bindings.end(),
      [role, condition_title, condition_description,
       condition_expression](gcs::NativeIamBinding b) {
        return (b.role() == role && b.has_condition() &&
                b.condition().title() == condition_title &&
                b.condition().description() == condition_description &&
                b.condition().expression() == condition_expression);
      });
  if (e == bindings.end()) {
    std::cout << "No matching binding group found.\n";
    return;
  }
  bindings.erase(e);
  auto updated = client.SetNativeBucketIamPolicy(bucket_name, *policy);
  if (!updated) throw std::move(updated).status();

  std::cout << "Conditional binding was removed.\n";
}

C#

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage C# API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

public class RemoveBucketConditionalIamBindingSample
{
    public Policy RemoveBucketConditionalIamBinding(
        string bucketName = "your-unique-bucket-name",
        string role = "roles/storage.objectViewer",
        string title = "title",
        string description = "description",
        string expression = "resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")")
    {
        var storage = StorageClient.Create();
        var policy = storage.GetBucketIamPolicy(bucketName, new GetBucketIamPolicyOptions
        {
            RequestedPolicyVersion = 3
        });
        // Set the policy schema version. For more information, please refer to https://cloud.google.com/iam/docs/policies#versions.
        policy.Version = 3;

        var bindingsToRemove = policy.Bindings.Where(binding => binding.Role == role
              && binding.Condition != null
              && binding.Condition.Title == title
              && binding.Condition.Description == description
              && binding.Condition.Expression == expression).ToList();
        if (bindingsToRemove.Count() > 0)
        {
            foreach (var binding in bindingsToRemove)
            {
                policy.Bindings.Remove(binding);
            }
            // Set the modified IAM policy to be the current IAM policy.
            policy = storage.SetBucketIamPolicy(bucketName, policy);
            Console.WriteLine("Conditional Binding was removed.");
        }
        else
        {
            Console.WriteLine("No matching conditional binding found.");
        }
        return policy;
    }
}

Go

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Go API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

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

// removeBucketConditionalIAMBinding removes bucket conditional IAM binding.
func removeBucketConditionalIAMBinding(w io.Writer, bucketName, role, title, description, expression string) error {
	// bucketName := "bucket-name"
	// role := "bucket-level IAM role"
	// title := "condition title"
	// description := "condition description"
	// expression := "condition expression"
	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)
	policy, err := bucket.IAM().V3().Policy(ctx)
	if err != nil {
		return fmt.Errorf("Bucket(%q).IAM().V3().Policy: %w", bucketName, err)
	}

	// Find the index of the binding matching inputs.
	i := -1
	for j, binding := range policy.Bindings {
		if binding.Role == role && binding.Condition != nil {
			condition := binding.Condition
			if condition.Title == title &&
				condition.Description == description &&
				condition.Expression == expression {
				i = j
			}
		}
	}

	if i == -1 {
		return fmt.Errorf("no matching binding group found")
	}

	// Get a slice of the bindings, removing the binding at index i.
	policy.Bindings = append(policy.Bindings[:i], policy.Bindings[i+1:]...)

	if err := bucket.IAM().V3().SetPolicy(ctx, policy); err != nil {
		return fmt.Errorf("Bucket(%q).IAM().V3().SetPolicy: %w", bucketName, err)
	}
	// NOTE: It may be necessary to retry this operation if IAM policies are
	// being modified concurrently. SetPolicy will return an error if the policy
	// was modified since it was retrieved.
	fmt.Fprintln(w, "Conditional binding was removed")
	return nil
}

Java

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Java API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

import com.google.cloud.Binding;
import com.google.cloud.Condition;
import com.google.cloud.Policy;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class RemoveBucketIamConditionalBinding {
  /** Example of removing a conditional binding to the Bucket-level IAM */
  public static void removeBucketIamConditionalBinding(String projectId, String bucketName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

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

    // For more information please read:
    // https://cloud.google.com/storage/docs/access-control/iam
    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    Policy originalPolicy =
        storage.getIamPolicy(bucketName, Storage.BucketSourceOption.requestedPolicyVersion(3));

    String role = "roles/storage.objectViewer";

    // getBindingsList() returns an ImmutableList and copying over to an ArrayList so it's mutable.
    List<Binding> bindings = new ArrayList(originalPolicy.getBindingsList());

    // Create a condition to compare against
    Condition.Builder conditionBuilder = Condition.newBuilder();
    conditionBuilder.setTitle("Title");
    conditionBuilder.setDescription("Description");
    conditionBuilder.setExpression(
        "resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")");

    Iterator iterator = bindings.iterator();
    while (iterator.hasNext()) {
      Binding binding = (Binding) iterator.next();
      boolean foundRole = binding.getRole().equals(role);
      boolean conditionsEqual = conditionBuilder.build().equals(binding.getCondition());

      // Remove condition when the role and condition are equal
      if (foundRole && conditionsEqual) {
        iterator.remove();
        break;
      }
    }

    // Update policy to remove conditional binding
    Policy.Builder updatedPolicyBuilder = originalPolicy.toBuilder();
    updatedPolicyBuilder.setBindings(bindings).setVersion(3);
    Policy updatedPolicy = storage.setIamPolicy(bucketName, updatedPolicyBuilder.build());

    System.out.println("Conditional Binding was removed.");
  }
}

Node.js

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Node.js API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

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

// The role to grant
// const roleName = 'roles/storage.objectViewer';

// The members to grant the new role to
// const members = [
//   'user:[e-mail]',
//   'group:[e-mail]',
// ];

// Create a condition
// const title = 'Title';
// const description = 'Description';
// const expression = 'resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")';

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

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

async function removeBucketConditionalBinding() {
  // Get a reference to a Google Cloud Storage bucket
  const bucket = storage.bucket(bucketName);

  // Gets and updates the bucket's IAM policy
  const [policy] = await bucket.iam.getPolicy({requestedPolicyVersion: 3});

  // Set the policy's version to 3 to use condition in bindings.
  policy.version = 3;

  // Finds and removes the appropriate role-member group with specific condition.
  const index = policy.bindings.findIndex(
    binding =>
      binding.role === roleName &&
      binding.condition &&
      binding.condition.title === title &&
      binding.condition.description === description &&
      binding.condition.expression === expression
  );

  const binding = policy.bindings[index];
  if (binding) {
    policy.bindings.splice(index, 1);

    // Updates the bucket's IAM policy
    await bucket.iam.setPolicy(policy);

    console.log('Conditional Binding was removed.');
  } else {
    // No matching role-member group with specific condition were found
    throw new Error('No matching binding group found.');
  }
}

removeBucketConditionalBinding().catch(console.error);

PHP

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage PHP API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

use Google\Cloud\Storage\StorageClient;

/**
 * Removes a conditional IAM binding from a bucket's IAM policy.
 *
 * To see how to express a condition in CEL, visit:
 * @see https://cloud.google.com/storage/docs/access-control/iam#conditions.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $role the role that will be given to members in this binding.
 *        (e.g. 'roles/storage.objectViewer')
 * @param string $title The title of the condition. (e.g. 'Title')
 * @param string $description The description of the condition.
 *        (e.g. 'Condition Description')
 * @param string $expression Te condition specified in CEL expression language.
 *        (e.g. 'resource.name.startsWith("projects/_/buckets/bucket-name/objects/prefix-a-")')
 */
function remove_bucket_conditional_iam_binding(string $bucketName, string $role, string $title, string $description, string $expression): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    $policy = $bucket->iam()->policy(['requestedPolicyVersion' => 3]);

    $policy['version'] = 3;

    $key_of_conditional_binding = null;
    foreach ($policy['bindings'] as $key => $binding) {
        if ($binding['role'] == $role && isset($binding['condition'])) {
            $condition = $binding['condition'];
            if ($condition['title'] == $title
                 && $condition['description'] == $description
                 && $condition['expression'] == $expression) {
                $key_of_conditional_binding = $key;
                break;
            }
        }
    }

    if ($key_of_conditional_binding != null) {
        unset($policy['bindings'][$key_of_conditional_binding]);
        // Ensure array keys are sequential, otherwise JSON encodes
        // the array as an object, which fails when calling the API.
        $policy['bindings'] = array_values($policy['bindings']);
        $bucket->iam()->setPolicy($policy);
        print('Conditional Binding was removed.' . PHP_EOL);
    } else {
        print('No matching conditional binding found.' . PHP_EOL);
    }
}

Python

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Python API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

from google.cloud import storage


def remove_bucket_conditional_iam_binding(
    bucket_name, role, title, description, expression
):
    """Remove a conditional IAM binding from a bucket's IAM policy."""
    # bucket_name = "your-bucket-name"
    # role = "IAM role, e.g. roles/storage.objectViewer"
    # title = "Condition title."
    # description = "Condition description."
    # expression = "Condition expression."

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)

    policy = bucket.get_iam_policy(requested_policy_version=3)

    # Set the policy's version to 3 to use condition in bindings.
    policy.version = 3

    condition = {
        "title": title,
        "description": description,
        "expression": expression,
    }
    policy.bindings = [
        binding
        for binding in policy.bindings
        if not (binding["role"] == role and binding.get("condition") == condition)
    ]

    bucket.set_iam_policy(policy)

    print("Conditional Binding was removed.")

Ruby

Untuk mengetahui informasi selengkapnya, lihatDokumentasi referensi Cloud Storage Ruby API.

Untuk melakukan autentikasi ke Cloud Storage, siapkan Kredensial Default Aplikasi. Untuk informasi selengkapnya, lihat Menyiapkan autentikasi untuk library klien.

def remove_bucket_conditional_iam_binding 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

  role        = "roles/storage.objectViewer"
  title       = "Title"
  description = "Description"
  expression  = "resource.name.startsWith(\"projects/_/buckets/bucket-name/objects/prefix-a-\")"

  bucket.policy requested_policy_version: 3 do |policy|
    policy.version = 3

    binding_to_remove = nil
    policy.bindings.each do |b|
      condition = {
        title:       title,
        description: description,
        expression:  expression
      }
      if (b.role == role) && (b.condition &&
        b.condition.title == title &&
        b.condition.description == description &&
        b.condition.expression == expression)
        binding_to_remove = b
      end
    end
    if binding_to_remove
      policy.bindings.remove binding_to_remove
      puts "Conditional Binding was removed."
    else
      puts "No matching conditional binding found."
    end
  end
end

REST API

JSON

1. Menginstal dan melakukan inisialisasi gcloud CLI , yang memungkinkan Anda membuat token akses untuk header Authorization.

2. Gunakan permintaan GET getIamPolicy untuk menyimpan kebijakan IAM bucket ke file JSON sementara:

   curl \
   'https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/iam' \
   --header 'Authorization: Bearer $(gcloud auth print-access-token)' > tmp-policy.json

   Dengan BUCKET_NAME adalah nama bucket yang aksesnya Anda berikan. Contoh, my-bucket.

3. Edit file tmp-policy.json di editor teks untuk menghapus kondisi dari kebijakan IAM.

4. Gunakan permintaan PUT setIamPolicy untuk menetapkan kebijakan IAM yang dimodifikasi pada bucket:

   curl -X PUT --data-binary @tmp-policy.json \
   -H "Authorization: Bearer $(gcloud auth print-access-token)" \
   -H "Content-Type: application/json" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/iam"

   Dengan BUCKET_NAME adalah nama bucket yang ingin Anda ubah kebijakan IAM-nya. Contoh, my-bucket.

Praktik terbaik

Anda harus menetapkan peran minimum yang diperlukan untuk memberi akun utama akses yang diperlukan. Misalnya, jika anggota tim hanya perlu membaca objek yang disimpan di bucket, beri mereka peran Storage Object Viewer (roles/storage.objectViewer), bukan peran Storage Object Admin (roles/storage.objectAdmin). Demikian pula, jika anggota tim memerlukan kontrol penuh atas objek di bucket, tetapi bukan bucket itu sendiri, berikan peran Storage Object Admin (roles/storage.objectAdmin) kepada mereka, bukan peran Storage Admin (roles/storage.admin).

Langkah selanjutnya

• Pelajari cara membagikan data Anda secara publik.
• Lihat Contoh berbagi dan kolaborasi yang spesifik.
• Pelajari praktik terbaik saat menggunakan IAM.
• Pelajari cara menggunakan rekomendasi peran untuk bucket.
• Untuk memecahkan masalah operasi yang gagal terkait peran dan izin IAM, lihat Pemecahan masalah.