Manage object lifecycles

Overview Configuration samples

This page describes how to set Object Lifecycle Management on a bucket and how to view a bucket's current lifecycle configuration. Lifecycle configurations apply to all current and future objects in the bucket.

Required permissions

Console

In order to complete this guide using the Google Cloud console, you must have the proper IAM permissions. If the bucket you want to access exists in a project that you did not create, you might need the project owner to give you a role that contains the necessary permissions.

For a list of permissions required for specific actions, see IAM permissions for the Google Cloud console.

For a list of relevant roles, see Cloud Storage roles. Alternatively, you can create a custom role that has specific, limited permissions.

Command line

In order to complete this guide using a command-line utility, you must have the proper IAM permissions. If the bucket you want to access exists in a project that you did not create, you might need the project owner to give you a role that contains the necessary permissions.

For a list of permissions required for specific actions, see IAM permissions for gsutil commands.

For a list of relevant roles, see Cloud Storage roles. Alternatively, you can create a custom role that has specific, limited permissions.

Client libraries

In order to complete this guide using the Cloud Storage client libraries, you must have the proper IAM permissions. If the bucket you want to access exists in a project that you did not create, you might need the project owner to give you a role that contains the necessary permissions.

Unless otherwise noted, client library requests are made through the JSON API and require permissions as listed in IAM permissions for JSON methods. To see which JSON API methods are invoked when you make requests using a client library, log the raw requests.

For a list of relevant IAM roles, see Cloud Storage roles. Alternatively, you can create a custom role that has specific, limited permissions.

REST APIs

JSON API

In order to complete this guide using the JSON API, you must have the proper IAM permissions. If the bucket you want to access exists in a project that you did not create, you might need the project owner to give you a role that contains the necessary permissions.

For a list of permissions required for specific actions, see IAM permissions for JSON methods.

For a list of relevant roles, see Cloud Storage roles. Alternatively, you can create a custom role that has specific, limited permissions.

Set the lifecycle configuration for a bucket

Warning: When you change your lifecycle configuration, Object Lifecycle Management may still perform actions based on the old configuration for up to 24 hours. For example, if you change an Age condition from 10 days to 20 days, an object that is 11 days old could be deleted by Object Lifecycle Management up to 24 hours later, based on the old configuration.

Console

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

   Go to Buckets

2. In the bucket list, find the bucket you want to enable, and click on the bucket's name.

3. Click on the Lifecycle tab.

   The lifecycle rules page appears. From here you can edit or delete existing rules. To add a new rule:

4. Click Add a rule.

5. In the page that appears, specify a configuration.

   1. Select the action to take when an object meets the conditions.

   2. Click Continue.

   3. Select the conditions under which an action is taken.

   4. Click Continue.

   5. Click Create.

To learn how to get detailed error information about failed Cloud Storage operations in the Google Cloud console, see Troubleshooting.

Command line

gcloud

1. Create a JSON file with the lifecycle configuration rules you would like to apply. See configuration examples for sample JSON files.

2. Use the gcloud storage buckets update command with the --lifecycle-file flag:

   gcloud storage buckets update gs://BUCKET_NAME --lifecycle-file=LIFECYCLE_CONFIG_FILE

   Where:

   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.
   • LIFECYCLE_CONFIG_FILE is the path for the JSON file that you created in Step 1.

gsutil

1. Create a JSON file with the lifecycle configuration rules you would like to apply. See configuration examples for sample JSON files.

2. Use the gsutil lifecycle set command to apply the configuration:

   gsutil lifecycle set LIFECYCLE_CONFIG_FILE gs://BUCKET_NAME

   Where:

   • LIFECYCLE_CONFIG_FILE is the path for the JSON file that you created in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

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.

The following sample sets a lifecycle configuration on a bucket:

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namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name) {
  gcs::BucketLifecycle bucket_lifecycle_rules = gcs::BucketLifecycle{
      {gcs::LifecycleRule(gcs::LifecycleRule::ConditionConjunction(
                              gcs::LifecycleRule::MaxAge(30),
                              gcs::LifecycleRule::IsLive(true)),
                          gcs::LifecycleRule::Delete())}};

  StatusOr<gcs::BucketMetadata> updated_metadata = client.PatchBucket(
      bucket_name,
      gcs::BucketMetadataPatchBuilder().SetLifecycle(bucket_lifecycle_rules));
  if (!updated_metadata) throw std::move(updated_metadata).status();

  if (!updated_metadata->has_lifecycle() ||
      updated_metadata->lifecycle().rule.empty()) {
    std::cout << "Bucket lifecycle management is not enabled for bucket "
              << updated_metadata->name() << ".\n";
    return;
  }
  std::cout << "Successfully enabled bucket lifecycle management for bucket "
            << updated_metadata->name() << ".\n";
  std::cout << "The bucket lifecycle rules are";
  for (auto const& kv : updated_metadata->lifecycle().rule) {
    std::cout << "\n " << kv.condition() << ", " << kv.action();
  }
  std::cout << "\n";
}

The following sample removes any existing lifecycle configuration from on a bucket:

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

  std::cout << "Successfully disabled bucket lifecycle management for bucket "
            << updated_metadata->name() << ".\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.

The following sample sets a lifecycle configuration on a bucket:

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

public class EnableBucketLifecycleManagementSample
{
    public Bucket EnableBucketLifecycleManagement(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bucket.Lifecycle = new Bucket.LifecycleData
        {
            Rule = new List<Bucket.LifecycleData.RuleData>
            {
                new Bucket.LifecycleData.RuleData
                {
                    Condition = new Bucket.LifecycleData.RuleData.ConditionData { Age = 100 },
                    Action = new Bucket.LifecycleData.RuleData.ActionData { Type = "Delete" }
                }
            }
        };
        bucket = storage.UpdateBucket(bucket);

        Console.WriteLine($"Lifecycle management is enabled for bucket {bucketName} and the rules are:");
        foreach (var rule in bucket.Lifecycle.Rule)
        {
            Console.WriteLine("Action:");
            Console.WriteLine($"Type: {rule.Action.Type}");
            Console.WriteLine($"Storage Class: {rule.Action.StorageClass}");

            Console.WriteLine("Condition:");
            Console.WriteLine($"Age: \t{rule.Condition.Age}");
            Console.WriteLine($"Created Before: \t{rule.Condition.CreatedBefore}");
            Console.WriteLine($"Time Before: \t{rule.Condition.CustomTimeBefore}");
            Console.WriteLine($"Days Since Custom Time: \t{rule.Condition.DaysSinceCustomTime}");
            Console.WriteLine($"Days Since Non-current Time: \t{rule.Condition.DaysSinceNoncurrentTime}");
            Console.WriteLine($"IsLive: \t{rule.Condition.IsLive}");
            Console.WriteLine($"Storage Class: \t{rule.Condition.MatchesStorageClass}");
            Console.WriteLine($"Noncurrent Time Before: \t{rule.Condition.NoncurrentTimeBefore}");
            Console.WriteLine($"Newer Versions: \t{rule.Condition.NumNewerVersions}");
        }
        return bucket;
    }
}

The following sample removes any existing lifecycle configuration from on a bucket:

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

public class DisableBucketLifecycleManagementSample
{
    public Bucket DisableBucketLifecycleManagement(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bucket.Lifecycle = null;
        bucket = storage.UpdateBucket(bucket);

        Console.WriteLine($"Lifecycle management is disabled for bucket {bucketName}.");
        return bucket;
    }
}

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.

The following sample sets a lifecycle configuration on a bucket:

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

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

// enableBucketLifecycleManagement adds a lifecycle delete rule with the
// condition that the object is 100 days old.
func enableBucketLifecycleManagement(w io.Writer, bucketName string) error {
	// bucketName := "bucket-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

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

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{
		Lifecycle: &storage.Lifecycle{
			Rules: []storage.LifecycleRule{
				{
					Action: storage.LifecycleAction{Type: "Delete"},
					Condition: storage.LifecycleCondition{
						AgeInDays: 100,
					},
				},
			},
		},
	}

	attrs, err := bucket.Update(ctx, bucketAttrsToUpdate)
	if err != nil {
		return fmt.Errorf("Bucket(%q).Update: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Lifecycle management is enabled for bucket %v\n and the rules are:\n", bucketName)
	for _, rule := range attrs.Lifecycle.Rules {
		fmt.Fprintf(w, "Action: %v\n", rule.Action)
		fmt.Fprintf(w, "Condition: %v\n", rule.Condition)
	}

	return nil
}

The following sample removes any existing lifecycle configuration from on a bucket:

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

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

// disableBucketLifecycleManagement removes all existing lifecycle rules
// from the bucket.
func disableBucketLifecycleManagement(w io.Writer, bucketName string) error {
	// bucketName := "bucket-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

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

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{
		Lifecycle: &storage.Lifecycle{},
	}

	_, err = bucket.Update(ctx, bucketAttrsToUpdate)
	if err != nil {
		return fmt.Errorf("Bucket(%q).Update: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Lifecycle management is disabled for bucket %v.\n", bucketName)

	return 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.

The following sample sets a lifecycle configuration on a bucket:

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import static com.google.cloud.storage.BucketInfo.LifecycleRule.LifecycleAction;
import static com.google.cloud.storage.BucketInfo.LifecycleRule.LifecycleCondition;

import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.BucketInfo.LifecycleRule;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import com.google.common.collect.ImmutableList;

public class EnableLifecycleManagement {
  public static void enableLifecycleManagement(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";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    Bucket bucket = storage.get(bucketName);

    // See the LifecycleRule documentation for additional info on what you can do with lifecycle
    // management rules. This one deletes objects that are over 100 days old.
    // https://googleapis.dev/java/google-cloud-clients/latest/com/google/cloud/storage/BucketInfo.LifecycleRule.html
    bucket
        .toBuilder()
        .setLifecycleRules(
            ImmutableList.of(
                new LifecycleRule(
                    LifecycleAction.newDeleteAction(),
                    LifecycleCondition.newBuilder().setAge(100).build())))
        .build()
        .update();

    System.out.println("Lifecycle management was enabled and configured for bucket " + bucketName);
  }
}

The following sample removes any existing lifecycle configuration from on a bucket:

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

public class DisableLifecycleManagement {
  public static void disableLifecycleManagement(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";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    Bucket bucket = storage.get(bucketName);
    bucket.toBuilder().deleteLifecycleRules().build().update();

    System.out.println("Lifecycle management was disabled for bucket " + bucketName);
  }
}

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.

The following sample sets a lifecycle configuration on a bucket:

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/**
 * 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 enableBucketLifecycleManagement() {
  const [metadata] = await storage.bucket(bucketName).addLifecycleRule({
    action: 'delete',
    condition: {age: 100},
  });

  console.log(
    `Lifecycle management is enabled for bucket ${bucketName} and the rules are:`
  );

  console.log(metadata.lifecycle.rule);
}

enableBucketLifecycleManagement().catch(console.error);

The following sample removes any existing lifecycle configuration from on a bucket:

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/**
 * 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 disableBucketLifecycleManagement() {
  await storage.bucket(bucketName).setMetadata({lifecycle: null});

  console.log(`Lifecycle management is disabled for bucket ${bucketName}`);
}

disableBucketLifecycleManagement().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.

The following sample sets a lifecycle configuration on a bucket:

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use Google\Cloud\Storage\StorageClient;
use Google\Cloud\Storage\Bucket;

/**
 * Enable bucket lifecycle management.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function enable_bucket_lifecycle_management(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    $lifecycle = Bucket::lifecycle()
        ->addDeleteRule([
            'age' => 100
        ]);

    $bucket->update([
        'lifecycle' => $lifecycle
    ]);

    $lifecycle = $bucket->currentLifecycle();

    printf('Lifecycle management is enabled for bucket %s and the rules are:' . PHP_EOL, $bucketName);
    foreach ($lifecycle as $rule) {
        print_r($rule);
        print(PHP_EOL);
    }
}

The following sample removes any existing lifecycle configuration from on a bucket:

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use Google\Cloud\Storage\StorageClient;

/**
 * Disable bucket lifecycle management.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function disable_bucket_lifecycle_management(string $bucketName): void
{
    $storage = new StorageClient();

    $bucket = $storage->bucket($bucketName);

    $bucket->update([
        'lifecycle' => null
    ]);

    printf('Lifecycle management is disabled for bucket %s.' . PHP_EOL, $bucketName);
}

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.

The following sample sets a lifecycle configuration on a bucket:

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from google.cloud import storage


def enable_bucket_lifecycle_management(bucket_name):
    """Enable lifecycle management for a bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)
    rules = bucket.lifecycle_rules

    print(f"Lifecycle management rules for bucket {bucket_name} are {list(rules)}")
    bucket.add_lifecycle_delete_rule(age=2)
    bucket.patch()

    rules = bucket.lifecycle_rules
    print(f"Lifecycle management is enable for bucket {bucket_name} and the rules are {list(rules)}")

    return bucket

The following sample removes any existing lifecycle configuration from on a bucket:

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from google.cloud import storage


def disable_bucket_lifecycle_management(bucket_name):
    """Disable lifecycle management for a bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)
    bucket.clear_lifecyle_rules()
    bucket.patch()
    rules = bucket.lifecycle_rules

    print(f"Lifecycle management is disable for bucket {bucket_name} and the rules are {list(rules)}")
    return bucket

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.

The following sample sets a lifecycle configuration on a bucket:

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def enable_bucket_lifecycle_management bucket_name:
  # Enable lifecycle management for a bucket
  # 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

  rules = bucket.lifecycle do |l|
    l.add_delete_rule age: 2
  end

  puts "Lifecycle management is enabled for bucket #{bucket_name} and the rules are #{rules}"
end

The following sample removes any existing lifecycle configuration from on a bucket:

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def disable_bucket_lifecycle_management bucket_name:
  # Disable lifecycle management for a bucket
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  require "google/cloud/storage"

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

  bucket.lifecycle do |l|
    l.clear
  end

  puts "Lifecycle management is disabled for bucket #{bucket_name}"
end

Terraform

You can use a Terraform resource to set a lifecycle configuration for a bucket managed by Terraform. To set a lifecycle configuration on an existing bucket that isn't yet managed by Terraform, you must first import the existing bucket.

To find out whether a lifecycle condition is supported by Terraform, see the Terraform documentation for the condition block.

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resource "random_id" "bucket_prefix" {
  byte_length = 8
}

resource "google_storage_bucket" "auto_expire" {
  provider                    = google-beta
  name                        = "${random_id.bucket_prefix.hex}-example-bucket"
  location                    = "US"
  uniform_bucket_level_access = true

  lifecycle_rule {
    condition {
      age = 3
    }
    action {
      type = "Delete"
    }
  }
}

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. For instructions, see API authentication.

2. Create a JSON file with the lifecycle configuration rules you would like to apply. See configuration examples for sample JSON files.

3. Use cURL to call the JSON API with a PATCH Bucket request:

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

   Where:

   • LIFECYCLE_CONFIG_FILE is the path for the JSON file that you created in Step 2.
   • OAUTH2_TOKEN is the access token you generated in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

XML API

1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials. For instructions, see API authentication.

2. Create an XML file with the lifecycle configuration rules you would like to apply. See configuration examples for sample XML files.

3. Use cURL to call the XML API with a PUT Bucket request:

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

   Where:

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

Note: To remove the lifecycle configuration for a bucket, set an empty lifecycle configuration.

Check the lifecycle configuration for a bucket

Console

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

   Go to Buckets

2. In the bucket list, the lifecycle status of each bucket is found in the Lifecycle column.

   You can click on this status to add, view, edit, and delete rules.

To learn how to get detailed error information about failed Cloud Storage operations in the Google Cloud console, see Troubleshooting.

Command line

gcloud

Use the gcloud storage buckets describe command with the --format flag:

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

Where BUCKET_NAME is the name of the bucket whose lifecycle configuration you want to view. For example, my-bucket.

gsutil

1. Use the gsutil lifecycle get command:

   gsutil lifecycle get gs://BUCKET_NAME

   Where BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

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.

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

  if (!updated_metadata->has_lifecycle() ||
      updated_metadata->lifecycle().rule.empty()) {
    std::cout << "Bucket lifecycle management is not enabled for bucket "
              << updated_metadata->name() << ".\n";
    return;
  }
  std::cout << "Bucket lifecycle management is enabled for bucket "
            << updated_metadata->name() << ".\n";
  std::cout << "The bucket lifecycle rules are";
  for (auto const& kv : updated_metadata->lifecycle().rule) {
    std::cout << "\n " << kv.condition() << ", " << kv.action();
  }
  std::cout << "\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.

To view the bucket's lifecycle policies, follow the instructions for displaying a bucket's metadata and look for the lifecycle policy fields in the response.

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

public class GetBucketMetadataSample
{
    public Bucket GetBucketMetadata(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName, new GetBucketOptions { Projection = Projection.Full });
        Console.WriteLine($"Bucket:\t{bucket.Name}");
        Console.WriteLine($"Acl:\t{bucket.Acl}");
        Console.WriteLine($"Billing:\t{bucket.Billing}");
        Console.WriteLine($"Cors:\t{bucket.Cors}");
        Console.WriteLine($"DefaultEventBasedHold:\t{bucket.DefaultEventBasedHold}");
        Console.WriteLine($"DefaultObjectAcl:\t{bucket.DefaultObjectAcl}");
        Console.WriteLine($"Encryption:\t{bucket.Encryption}");
        if (bucket.Encryption != null)
        {
            Console.WriteLine($"KmsKeyName:\t{bucket.Encryption.DefaultKmsKeyName}");
        }
        Console.WriteLine($"Id:\t{bucket.Id}");
        Console.WriteLine($"Kind:\t{bucket.Kind}");
        Console.WriteLine($"Lifecycle:\t{bucket.Lifecycle}");
        Console.WriteLine($"Location:\t{bucket.Location}");
        Console.WriteLine($"LocationType:\t{bucket.LocationType}");
        Console.WriteLine($"Logging:\t{bucket.Logging}");
        Console.WriteLine($"Metageneration:\t{bucket.Metageneration}");
        Console.WriteLine($"Owner:\t{bucket.Owner}");
        Console.WriteLine($"ProjectNumber:\t{bucket.ProjectNumber}");
        Console.WriteLine($"RetentionPolicy:\t{bucket.RetentionPolicy}");
        Console.WriteLine($"SelfLink:\t{bucket.SelfLink}");
        Console.WriteLine($"StorageClass:\t{bucket.StorageClass}");
        Console.WriteLine($"TimeCreated:\t{bucket.TimeCreated}");
        Console.WriteLine($"Updated:\t{bucket.Updated}");
        Console.WriteLine($"Versioning:\t{bucket.Versioning}");
        Console.WriteLine($"Website:\t{bucket.Website}");
        Console.WriteLine($"TurboReplication:\t{bucket.Rpo}");
        if (bucket.Labels != null)
        {
            Console.WriteLine("Labels:");
            foreach (var label in bucket.Labels)
            {
                Console.WriteLine($"{label.Key}:\t{label.Value}");
            }
        }
        return bucket;
    }
}

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.

To view the bucket's lifecycle policies, follow the instructions for displaying a bucket's metadata and look for the lifecycle policy fields in the response.

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

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

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

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()
	attrs, err := client.Bucket(bucketName).Attrs(ctx)
	if err != nil {
		return nil, fmt.Errorf("Bucket(%q).Attrs: %w", bucketName, err)
	}
	fmt.Fprintf(w, "BucketName: %v\n", attrs.Name)
	fmt.Fprintf(w, "Location: %v\n", attrs.Location)
	fmt.Fprintf(w, "LocationType: %v\n", attrs.LocationType)
	fmt.Fprintf(w, "StorageClass: %v\n", attrs.StorageClass)
	fmt.Fprintf(w, "Turbo replication (RPO): %v\n", attrs.RPO)
	fmt.Fprintf(w, "TimeCreated: %v\n", attrs.Created)
	fmt.Fprintf(w, "Metageneration: %v\n", attrs.MetaGeneration)
	fmt.Fprintf(w, "PredefinedACL: %v\n", attrs.PredefinedACL)
	if attrs.Encryption != nil {
		fmt.Fprintf(w, "DefaultKmsKeyName: %v\n", attrs.Encryption.DefaultKMSKeyName)
	}
	if attrs.Website != nil {
		fmt.Fprintf(w, "IndexPage: %v\n", attrs.Website.MainPageSuffix)
		fmt.Fprintf(w, "NotFoundPage: %v\n", attrs.Website.NotFoundPage)
	}
	fmt.Fprintf(w, "DefaultEventBasedHold: %v\n", attrs.DefaultEventBasedHold)
	if attrs.RetentionPolicy != nil {
		fmt.Fprintf(w, "RetentionEffectiveTime: %v\n", attrs.RetentionPolicy.EffectiveTime)
		fmt.Fprintf(w, "RetentionPeriod: %v\n", attrs.RetentionPolicy.RetentionPeriod)
		fmt.Fprintf(w, "RetentionPolicyIsLocked: %v\n", attrs.RetentionPolicy.IsLocked)
	}
	fmt.Fprintf(w, "RequesterPays: %v\n", attrs.RequesterPays)
	fmt.Fprintf(w, "VersioningEnabled: %v\n", attrs.VersioningEnabled)
	if attrs.Logging != nil {
		fmt.Fprintf(w, "LogBucket: %v\n", attrs.Logging.LogBucket)
		fmt.Fprintf(w, "LogObjectPrefix: %v\n", attrs.Logging.LogObjectPrefix)
	}
	if attrs.CORS != nil {
		fmt.Fprintln(w, "CORS:")
		for _, v := range attrs.CORS {
			fmt.Fprintf(w, "\tMaxAge: %v\n", v.MaxAge)
			fmt.Fprintf(w, "\tMethods: %v\n", v.Methods)
			fmt.Fprintf(w, "\tOrigins: %v\n", v.Origins)
			fmt.Fprintf(w, "\tResponseHeaders: %v\n", v.ResponseHeaders)
		}
	}
	if attrs.Labels != nil {
		fmt.Fprintf(w, "\n\n\nLabels:")
		for key, value := range attrs.Labels {
			fmt.Fprintf(w, "\t%v = %v\n", key, value)
		}
	}
	return attrs, 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.

To view the bucket's lifecycle policies, follow the instructions for displaying a bucket's metadata and look for the lifecycle policy fields in the response.

View on GitHub Feedback

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

public class GetBucketMetadata {
  public static void getBucketMetadata(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";

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

    // Select all fields. Fields can be selected individually e.g. Storage.BucketField.NAME
    Bucket bucket =
        storage.get(bucketName, Storage.BucketGetOption.fields(Storage.BucketField.values()));

    // Print bucket metadata
    System.out.println("BucketName: " + bucket.getName());
    System.out.println("DefaultEventBasedHold: " + bucket.getDefaultEventBasedHold());
    System.out.println("DefaultKmsKeyName: " + bucket.getDefaultKmsKeyName());
    System.out.println("Id: " + bucket.getGeneratedId());
    System.out.println("IndexPage: " + bucket.getIndexPage());
    System.out.println("Location: " + bucket.getLocation());
    System.out.println("LocationType: " + bucket.getLocationType());
    System.out.println("Metageneration: " + bucket.getMetageneration());
    System.out.println("NotFoundPage: " + bucket.getNotFoundPage());
    System.out.println("RetentionEffectiveTime: " + bucket.getRetentionEffectiveTime());
    System.out.println("RetentionPeriod: " + bucket.getRetentionPeriod());
    System.out.println("RetentionPolicyIsLocked: " + bucket.retentionPolicyIsLocked());
    System.out.println("RequesterPays: " + bucket.requesterPays());
    System.out.println("SelfLink: " + bucket.getSelfLink());
    System.out.println("StorageClass: " + bucket.getStorageClass().name());
    System.out.println("TimeCreated: " + bucket.getCreateTime());
    System.out.println("VersioningEnabled: " + bucket.versioningEnabled());
    if (bucket.getLabels() != null) {
      System.out.println("\n\n\nLabels:");
      for (Map.Entry<String, String> label : bucket.getLabels().entrySet()) {
        System.out.println(label.getKey() + "=" + label.getValue());
      }
    }
    if (bucket.getLifecycleRules() != null) {
      System.out.println("\n\n\nLifecycle Rules:");
      for (BucketInfo.LifecycleRule rule : bucket.getLifecycleRules()) {
        System.out.println(rule);
      }
    }
  }
}

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.

To view the bucket's lifecycle policies, follow the instructions for displaying a bucket's metadata and look for the lifecycle policy fields in the response.

View on GitHub Feedback

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

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

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

  // Get Bucket Metadata
  const [metadata] = await storage.bucket(bucketName).getMetadata();

  console.log(JSON.stringify(metadata, null, 2));
}

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.

To view the bucket's lifecycle policies, follow the instructions for displaying a bucket's metadata and look for the lifecycle policy fields in the response.

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Get bucket metadata.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function get_bucket_metadata(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $info = $bucket->info();

    printf('Bucket Metadata: %s' . PHP_EOL, print_r($info));
}

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.

To view the bucket's lifecycle policies, follow the instructions for displaying a bucket's metadata and look for the lifecycle policy fields in the response.

View on GitHub Feedback

from google.cloud import storage


def bucket_metadata(bucket_name):
    """Prints out a bucket's metadata."""
    # bucket_name = 'your-bucket-name'

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

    print(f"ID: {bucket.id}")
    print(f"Name: {bucket.name}")
    print(f"Storage Class: {bucket.storage_class}")
    print(f"Location: {bucket.location}")
    print(f"Location Type: {bucket.location_type}")
    print(f"Cors: {bucket.cors}")
    print(f"Default Event Based Hold: {bucket.default_event_based_hold}")
    print(f"Default KMS Key Name: {bucket.default_kms_key_name}")
    print(f"Metageneration: {bucket.metageneration}")
    print(
        f"Public Access Prevention: {bucket.iam_configuration.public_access_prevention}"
    )
    print(f"Retention Effective Time: {bucket.retention_policy_effective_time}")
    print(f"Retention Period: {bucket.retention_period}")
    print(f"Retention Policy Locked: {bucket.retention_policy_locked}")
    print(f"Requester Pays: {bucket.requester_pays}")
    print(f"Self Link: {bucket.self_link}")
    print(f"Time Created: {bucket.time_created}")
    print(f"Versioning Enabled: {bucket.versioning_enabled}")
    print(f"Labels: {bucket.labels}")

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.

To view the bucket's lifecycle policies, follow the instructions for displaying a bucket's metadata and look for the lifecycle policy fields in the response.

View on GitHub Feedback

def get_bucket_metadata 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

  puts "ID:                       #{bucket.id}"
  puts "Name:                     #{bucket.name}"
  puts "Storage Class:            #{bucket.storage_class}"
  puts "Location:                 #{bucket.location}"
  puts "Location Type:            #{bucket.location_type}"
  puts "Cors:                     #{bucket.cors}"
  puts "Default Event Based Hold: #{bucket.default_event_based_hold?}"
  puts "Default KMS Key Name:     #{bucket.default_kms_key}"
  puts "Logging Bucket:           #{bucket.logging_bucket}"
  puts "Logging Prefix:           #{bucket.logging_prefix}"
  puts "Metageneration:           #{bucket.metageneration}"
  puts "Retention Effective Time: #{bucket.retention_effective_at}"
  puts "Retention Period:         #{bucket.retention_period}"
  puts "Retention Policy Locked:  #{bucket.retention_policy_locked?}"
  puts "Requester Pays:           #{bucket.requester_pays}"
  puts "Self Link:                #{bucket.api_url}"
  puts "Time Created:             #{bucket.created_at}"
  puts "Versioning Enabled:       #{bucket.versioning?}"
  puts "Index Page:               #{bucket.website_main}"
  puts "Not Found Page:           #{bucket.website_404}"
  puts "Labels:"
  bucket.labels.each do |key, value|
    puts " - #{key} = #{value}"
  end
  puts "Lifecycle Rules:"
  bucket.lifecycle.each do |rule|
    puts "#{rule.action} - #{rule.storage_class} - #{rule.age} - #{rule.matches_storage_class}"
  end
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. For instructions, see API authentication.

2. Use cURL to call the JSON API with a GET Bucket request:

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

   Where:

   • OAUTH2_TOKEN is the access token you generated in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

XML API

1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials. For instructions, see API authentication.

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

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

   Where:

   • OAUTH2_TOKEN is the access token you generated in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

What's next

• Learn more about Object Lifecycle Management, including the available lifecycle actions and lifecycle conditions.
• Explore lifecycle configuration examples.