Using bucket labels

This page shows you how to add, view, edit, and remove the labels set on a bucket in Cloud Storage. For an overview of buckets and bucket labels, see the Key Terms.

Add a bucket label

Console

  1. Open the Cloud Storage browser in the Google Cloud Console.
    Open the Cloud Storage browser
  2. In the bucket list, find the bucket you want to apply a label to, and click its Bucket overflow menu ().

  3. Click Edit labels.

  4. In the side panel that appears, click the + Add label button.

  5. Specify a key and value for your label.

  6. Click Save.

In the Edit labels side panel, you can also edit the Value of existing labels.

See Troubleshooting for how to get detailed error information about failed operations in the Cloud Storage browser.

gsutil

Use the -l flag in a label ch command. For example:

gsutil label ch -l KEY_1:VALUE_1 gs://BUCKET_NAME

Where

  • KEY_1 is the key name for your label. For example, pet.
  • VALUE_1 is the value for your label. For example, dog.
  • BUCKET_NAME is the name of the bucket that the label applies to. For example, my-bucket.

Use multiple -l flags to add or edit multiple key:value pairs in a single command.

Use the label set command to replace all existing labels with new ones.

Code samples

C++

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

namespace gcs = google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& label_key, std::string const& label_value) {
  StatusOr<gcs::BucketMetadata> updated_metadata = client.PatchBucket(
      bucket_name,
      gcs::BucketMetadataPatchBuilder().SetLabel(label_key, label_value));

  if (!updated_metadata) {
    throw std::runtime_error(updated_metadata.status().message());
  }

  std::cout << "Successfully set label " << label_key << " to " << label_value
            << " on bucket  " << updated_metadata->name() << ".";
  std::cout << " The bucket labels are now:";
  for (auto const& kv : updated_metadata->labels()) {
    std::cout << "\n  " << kv.first << ": " << kv.second;
  }
  std::cout << "\n";
}

Go

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

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

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

// addBucketLabel adds a label on a bucket.
func addBucketLabel(w io.Writer, bucketName, labelName, labelValue string) error {
	// bucketName := "bucket-name"
	// labelName := "label-name"
	// labelValue := "label-value"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

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

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{}
	bucketAttrsToUpdate.SetLabel(labelName, labelValue)
	if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
		return fmt.Errorf("Bucket(%q).Update: %v", bucketName, err)
	}
	fmt.Fprintf(w, "Added label %q with value %q to bucket %v\n", labelName, labelValue, bucketName)
	return nil
}

Java

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

import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.HashMap;
import java.util.Map;

public class AddBucketLabel {
  public static void addBucketLabel(
      String projectId, String bucketName, String labelKey, String labelValue) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

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

    // The key of the label to add
    // String labelKey = "label-key-to-add";

    // The value of the label to add
    // String labelValue = "label-value-to-add";

    Map<String, String> labelsToAdd = new HashMap<>();
    labelsToAdd.put(labelKey, labelValue);

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    Bucket bucket = storage.get(bucketName);
    Map<String, String> labels = bucket.getLabels();
    if (labels == null) {
      labels = labelsToAdd;
    } else {
      labels.putAll(labelsToAdd);
    }
    bucket.toBuilder().setLabels(labels).build().update();

    System.out.println(
        "Added label " + labelKey + " with value " + labelValue + " to bucket " + bucketName + ".");
  }
}

Node.js

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

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const bucketName = 'Name of a bucket, e.g. my-bucket';
// const labelKey = 'The key of the label to add, e.g. labelone';
// const labelValue = 'The value of the label to add, e.g. labelonevalue';

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

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

const labels = {
  [labelKey]: labelValue,
};
async function addBucketLabel() {
  await storage.bucket(bucketName).setLabels(labels);
  console.log(`Added label to bucket ${bucketName}.`);
}

addBucketLabel();

PHP

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

use Google\Cloud\Storage\StorageClient;

/**
 * Adds or updates a bucket label.
 *
 * @param string $bucketName the name of your Cloud Storage bucket.
 * @param string $labelName the name of the label to add.
 * @param string $labelValue the value of the label to add.
 */
function add_bucket_label($bucketName, $labelName, $labelValue)
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $newLabels = [$labelName => $labelValue];
    $bucket->update(['labels' => $newLabels]);
    printf('Added label %s (%s) to %s' . PHP_EOL, $labelName, $labelValue, $bucketName);
}

Python

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

import pprint

from google.cloud import storage


def add_bucket_label(bucket_name):
    """Add a label to a bucket."""
    # bucket_name = "your-bucket-name"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)
    labels = bucket.labels
    labels["example"] = "label"
    bucket.labels = labels
    bucket.patch()

    print("Updated labels on {}.".format(bucket.name))
    pprint.pprint(bucket.labels)

Ruby

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

def add_bucket_label bucket_name:, label_key:, label_value:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  # The key of the label to add
  # label_key = "label-key-to-add"

  # The value of the label to add
  # label_value = "label-value-to-add"

  require "google/cloud/storage"

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

  bucket.update do |bucket|
    bucket.labels[label_key] = label_value
  end

  puts "Added label #{label_key} with value #{label_value} to #{bucket_name}"
end

REST APIs

JSON API

  1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.
  2. Create a .json file that contains the following information:

    {
      "labels": {
        "KEY_1": "VALUE_1"
      }
    }

    Where

    • KEY_1 is the key name for your label. For example, pet.
    • VALUE_1 is the value for your label. For example, dog.
  3. Use cURL to call the JSON API with a PATCH Bucket request:

    curl -X PATCH --data-binary @JSON_FILE_NAME.json \
      -H "Authorization: Bearer OAUTH2_TOKEN" \
      -H "Content-Type: application/json" \
      "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=labels"

    Where:

    • JSON_FILE_NAME is the name of the JSON file you created in Step 2.
    • OAUTH2_TOKEN is the access token you generated in Step 1.
    • BUCKET_NAME is the name of the bucket that the label applies to. For example, my-bucket.

You can add or edit multiple key:value pairs in a request.

XML API

  1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.
  2. Create a .xml file that contains the following information:

    <Tagging>
      <TagSet>
        <Tag>
          <Key>KEY_1</Key>
          <Value>VALUE_1</Value>
        </Tag>
      </TagSet>
    </Tagging>

    Where:

    • KEY_1 is the key name for your label. For example, pet.
    • VALUE_1 is the value for your label. For example, dog.

    Note that you can add multiple <Tag> elements in a request.

  3. Use cURL to call the XML API with a PUT Bucket request and tagging query string parameter:

    curl -X PUT --data-binary @XML_FILE_NAME.xml \
      -H "Authorization: Bearer OAUTH2_TOKEN" \
      "https://storage.googleapis.com/BUCKET_NAME?tagging"

    Where:

    • XML_FILE_NAME is the XML file you created in Step 2.
    • OAUTH2_TOKEN is the access token you generated in Step 1.
    • BUCKET_NAME is the name of the bucket that the label applies to. For example, my-bucket.

View bucket labels

Console

  1. Open the Cloud Storage browser in the Google Cloud Console.
    Open the Cloud Storage browser
  2. (Optional): You can limit the columns displayed in the Cloud Console bucket list by clicking the Column display options menu (Column options icon.).

  3. In the bucket list, find the bucket you want to verify, and check the entry for Label. You may need to scroll horizontally to view the Label column.

    If your bucket has multiple labels, some may be hidden. When labels are hidden, an expandable button appears. Clicking the button displays all labels for a bucket.

    Bucket list with labels column

See Troubleshooting for how to get detailed error information about failed operations in the Cloud Storage browser.

gsutil

Use following gsutil ls command:

gsutil ls -L -b gs://BUCKET_NAME

Where:

  • BUCKET_NAME is the bucket whose labels you want to view. For example, my-bucket.

The response looks like the following example:

gs://my-bucket/ :
  Storage class:         STANDARD
  ...
  ...
  Labels:
    {
      "your_label_key": "your_label_value"
    }
  ...

Code samples

C++

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

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, gcs::Fields("labels"));

  if (!bucket_metadata) {
    throw std::runtime_error(bucket_metadata.status().message());
  }

  if (bucket_metadata->labels().empty()) {
    std::cout << "The bucket " << bucket_name << " has no labels set.\n";
    return;
  }

  std::cout << "The labels for bucket " << bucket_name << " are:";
  for (auto const& kv : bucket_metadata->labels()) {
    std::cout << "\n  " << kv.first << ": " << kv.second;
  }
  std::cout << "\n";
}

PHP

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

use Google\Cloud\Storage\StorageClient;

/**
 * Prints a list of a bucket's lables.
 *
 * @param string $bucketName the name of your Cloud Storage bucket.
 */
function get_bucket_labels($bucketName)
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $info = $bucket->info();
    if (isset($info['labels'])) {
        foreach ($info['labels'] as $labelKey => $labelValue) {
            printf('%s: %s' . PHP_EOL, $labelKey, $labelValue);
        }
    }
}

Python

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

import pprint

from google.cloud import storage


def get_bucket_labels(bucket_name):
    """Prints out a bucket's labels."""
    # bucket_name = 'your-bucket-name'
    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)

    labels = bucket.labels
    pprint.pprint(labels)

REST APIs

JSON API

  1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.
  2. Use cURL to call the JSON API with a GET Bucket request that includes the fields=labels query string parameter:

    curl -X GET \
      -H "Authorization: Bearer OAUTH2_TOKEN" \
      "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=labels"

    Where:

    • OAUTH2_TOKEN is the access token you generated in Step 1.
    • BUCKET_NAME is the name of the bucket whose labels you want to view. For example, my-bucket.

The response looks like the following example:

{
  "labels" : {
     (your_label_key): your_label_value
   },
}

XML API

  1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.
  2. Use cURL to call the XML API with a GET Bucket request and tagging query string parameter:

    curl -X GET \
      -H "Authorization: Bearer OAUTH2_TOKEN" \
      "https://storage.googleapis.com/BUCKET_NAME?tagging"

    Where:

    • OAUTH2_TOKEN is the access token you generated in Step 1.
    • BUCKET_NAME is the name of the bucket whose labels you want to view. For example, my-bucket.

The response looks like the following example:

<Tagging>
  <TagSet>
    <Tag>
      <Key>your_label_key</Key>
      <Value>your_label_value</Value>
    </Tag>
  </TagSet>
</Tagging>

Remove a bucket label

Console

  1. Open the Cloud Storage browser in the Google Cloud Console.
    Open the Cloud Storage browser
  2. In the bucket list, find the bucket whose label you want to remove, and click the bucket's Bucket overflow menu ().

  3. Click Edit labels.

  4. Click the X associated with the label you want to remove.

  5. Click Save.

See Troubleshooting for how to get detailed error information about failed operations in the Cloud Storage browser.

gsutil

Use the -d flag in a label ch command. For example:

gsutil label ch -d KEY_1 gs://BUCKET_NAME

Where:

  • KEY_1 is the key name for your label. For example, pet.
  • BUCKET_NAME is the name of the bucket that the label applies to. For example, my-bucket.

Use the label set command to replace all existing labels with new ones.

Code samples

C++

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

namespace gcs = google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& label_key) {
  StatusOr<gcs::BucketMetadata> updated_metadata = client.PatchBucket(
      bucket_name, gcs::BucketMetadataPatchBuilder().ResetLabel(label_key));

  if (!updated_metadata) {
    throw std::runtime_error(updated_metadata.status().message());
  }

  std::cout << "Successfully reset label " << label_key << " on bucket  "
            << updated_metadata->name() << ".";
  if (updated_metadata->labels().empty()) {
    std::cout << " The bucket now has no labels.\n";
    return;
  }
  std::cout << " The bucket labels are now:";
  for (auto const& kv : updated_metadata->labels()) {
    std::cout << "\n  " << kv.first << ": " << kv.second;
  }
  std::cout << "\n";
}

Go

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

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

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

// removeBucketLabel removes a label on a bucket.
func removeBucketLabel(w io.Writer, bucketName, labelName string) error {
	// bucketName := "bucket-name"
	// labelName := "label-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

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

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{}
	bucketAttrsToUpdate.DeleteLabel(labelName)
	if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
		return fmt.Errorf("Bucket(%q).Update: %v", bucketName, err)
	}
	fmt.Fprintf(w, "Removed label %q from bucket %v\n", labelName, bucketName)
	return nil
}

Java

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

import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.HashMap;
import java.util.Map;

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

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

    // The key of the label to remove from the bucket
    // String labelKey = "label-key-to-remove";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    Map<String, String> labelsToRemove = new HashMap<>();
    labelsToRemove.put(labelKey, null);

    Bucket bucket = storage.get(bucketName);
    Map<String, String> labels;
    if (bucket.getLabels() == null) {
      labels = new HashMap<>();
    } else {
      labels = new HashMap(bucket.getLabels());
    }
    labels.putAll(labelsToRemove);
    bucket.toBuilder().setLabels(labels).build().update();

    System.out.println("Removed label " + labelKey + " from bucket " + bucketName);
  }
}

Node.js

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

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const bucketName = 'Name of a bucket, e.g. my-bucket';
// const label_keys = 'List of label keys, e.g. ['label1','label2']';

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

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

async function removeBucketLabel() {
  await storage.bucket(bucketName).deleteLabels(label_keys);
  console.log(`Removed labels from bucket ${bucketName}.`);
}

removeBucketLabel();

PHP

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

use Google\Cloud\Storage\StorageClient;

/**
 * Removes a label from a bucket.
 *
 * @param string $bucketName the name of your Cloud Storage bucket.
 * @param string $labelName the name of the label to remove.
 */
function remove_bucket_label($bucketName, $labelName)
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $labels = [$labelName => null];
    $bucket->update(['labels' => $labels]);
    printf('Removed label %s from %s' . PHP_EOL, $labelName, $bucketName);
}

Python

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

import pprint

from google.cloud import storage


def remove_bucket_label(bucket_name):
    """Remove a label from a bucket."""
    # bucket_name = "your-bucket-name"

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

    labels = bucket.labels

    if "example" in labels:
        del labels["example"]

    bucket.labels = labels
    bucket.patch()

    print("Removed labels on {}.".format(bucket.name))
    pprint.pprint(bucket.labels)

Ruby

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

def remove_bucket_label bucket_name:, label_key:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  # The key of the label to remove from the bucket
  # label_key = "label-key-to-remove"

  require "google/cloud/storage"

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

  bucket.update do |bucket|
    bucket.labels[label_key] = nil
  end

  puts "Deleted label #{label_key} from #{bucket_name}"
end

REST APIs

JSON API

  1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.
  2. Create a .json file that contains the following information:

    {
      "labels": {
        "KEY_1": null
      }
    }

    Where:

    • KEY_1 is the key name for your label. For example, pet.
  3. Use cURL to call the JSON API with a PATCH Bucket request:

    curl -X PATCH --data-binary @JSON_FILE_NAME.json \
      -H "Authorization: Bearer OAUTH2_TOKEN" \
      -H "Content-Type: application/json" \
      "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=labels"

    Where:

    • JSON_FILE_NAME is the name of the JSON file you created in Step 2.
    • OAUTH2_TOKEN is the name of the access token you generated in Step 1.
    • BUCKET_NAME is the name of the bucket the label applies to. For example, my-bucket.

You can remove multiple key:value pairs in a request.

XML API

  1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.
  2. Create a .xml file that contains the following information:

    <Tagging>
      <TagSet>
        <Tag>
        </Tag>
      </TagSet>
    </Tagging>

    Note that you can add multiple <Tag> elements in a request.

  3. Use cURL to call the XML API with a PUT Bucket request and tagging query string parameter:

    curl -X PUT --data-binary @XML_FILE_NAME.xml \
      -H "Authorization: Bearer OAUTH2_TOKEN" \
      "https://storage.googleapis.com/BUCKET_NAME?tagging"

    Where:

    • XML_FILE_NAME is the name of the XML file you created in Step 2.
    • OAUTH2_TOKENis the name of the access token you generated in Step 1.
    • BUCKET_NAME is the name of the bucket the label applies to. For example, my-bucket.

What's next