Listing buckets

This page shows you how to list the Cloud Storage buckets in a project, which are ordered in the list lexicographically by name.

Before you begin

To get the permissions that you need to list buckets, ask your administrator to grant you the Storage Admin (roles/storage.admin) IAM role or the Viewer (roles/viewer) basic role on the project that contains the buckets you want to list.

For more information about granting roles for projects, see Manage access to projects.

The roles contain the storage.buckets.list permission, which is required to list buckets. You can also get this permission with custom roles.

List the buckets in a project

Console

1. In the Google Cloud console, go to the Cloud Storage Buckets page.
   

   Go to Buckets

Buckets that are part of the currently selected project appear in the list.

Optionally, use filtering and sorting to limit and organize the results in your list.

Command line

Note: Cloud Shell provisions a temporary virtual machine. If you want to upload objects to Cloud Storage or download objects from Cloud Storage, use a local development environment.

1. In the Google Cloud console, activate Cloud Shell.

   Activate Cloud Shell

   At the bottom of the Google Cloud console, a Cloud Shell session starts and displays a command-line prompt. Cloud Shell is a shell environment with the Google Cloud CLI already installed and with values already set for your current project. It can take a few seconds for the session to initialize.

2. In your development environment, run the gcloud storage ls command:

   gcloud storage ls

   The response looks like the following example:

   gs://BUCKET_NAME1/
     gs://BUCKET_NAME2/
     gs://BUCKET_NAME3/
     ...

Client libraries

C++

For more information, see the Cloud Storage C++ API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client) {
  int count = 0;
  gcs::ListBucketsReader bucket_list = client.ListBuckets();
  for (auto&& bucket_metadata : bucket_list) {
    if (!bucket_metadata) throw std::move(bucket_metadata).status();

    std::cout << bucket_metadata->name() << "\n";
    ++count;
  }

  if (count == 0) {
    std::cout << "No buckets in default project\n";
  }
}

C#

For more information, see the Cloud Storage C# API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

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

public class ListBucketsSample
{
    public IEnumerable<Bucket> ListBuckets(string projectId = "your-project-id")
    {
        var storage = StorageClient.Create();
        var buckets = storage.ListBuckets(projectId);
        Console.WriteLine("Buckets:");
        foreach (var bucket in buckets)
        {
            Console.WriteLine(bucket.Name);
        }
        return buckets;
    }
}

Go

For more information, see the Cloud Storage Go API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

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

	"cloud.google.com/go/storage"
	"google.golang.org/api/iterator"
)

// listBuckets lists buckets in the project.
func listBuckets(w io.Writer, projectID string) ([]string, error) {
	// projectID := "my-project-id"
	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*30)
	defer cancel()

	var buckets []string
	it := client.Buckets(ctx, projectID)
	for {
		battrs, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return nil, err
		}
		buckets = append(buckets, battrs.Name)
		fmt.Fprintf(w, "Bucket: %v\n", battrs.Name)
	}
	return buckets, nil
}

Java

For more information, see the Cloud Storage Java API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import com.google.api.gax.paging.Page;
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

public class ListBuckets {
  public static void listBuckets(String projectId) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    Page<Bucket> buckets = storage.list();

    for (Bucket bucket : buckets.iterateAll()) {
      System.out.println(bucket.getName());
    }
  }
}

Node.js

For more information, see the Cloud Storage Node.js API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

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

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

async function listBuckets() {
  const [buckets] = await storage.getBuckets();

  console.log('Buckets:');
  buckets.forEach(bucket => {
    console.log(bucket.name);
  });
}

listBuckets().catch(console.error);

PHP

For more information, see the Cloud Storage PHP API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

use Google\Cloud\Storage\StorageClient;

/**
 * List all Cloud Storage buckets for the current project.
 */
function list_buckets(): void
{
    $storage = new StorageClient();
    foreach ($storage->buckets() as $bucket) {
        printf('Bucket: %s' . PHP_EOL, $bucket->name());
    }
}

Python

For more information, see the Cloud Storage Python API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from google.cloud import storage


def list_buckets():
    """Lists all buckets."""

    storage_client = storage.Client()
    buckets = storage_client.list_buckets()

    for bucket in buckets:
        print(bucket.name)

Ruby

For more information, see the Cloud Storage Ruby API reference documentation.

To authenticate to Cloud Storage, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

def list_buckets
  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new

  storage.buckets.each do |bucket|
    puts bucket.name
  end
end

REST APIs

JSON API

1. Have gcloud CLI installed and initialized, which lets you generate an access token for the Authorization header.

2. Use cURL to call the JSON API with a request to list buckets:

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

   Where PROJECT_IDENTIFIER is the ID or number of the project containing the buckets you want to list. For example, my-project.

XML API

1. Have gcloud CLI installed and initialized, which lets you generate an access token for the Authorization header.

2. Use cURL to call the XML API with a GET Service request:

   curl -X GET -H "Authorization: Bearer $(gcloud auth print-access-token)" \
     -H "x-goog-project-id: PROJECT_ID" \
     "https://storage.googleapis.com"

   Where PROJECT_ID is the ID of the project containing the buckets you want to list. For example, my-project.

What's next

• Get information about a bucket's size.
• List the objects in a bucket.
• Move or rename a bucket.
• Delete a bucket.
• Learn how to paginate results.