Bucket in Object Storage

A logical entity that helps store objects.

Naming buckets

A bucket's name is used as part of the data access URL and is visible to your users. For example, https://storage.yandexcloud.net/bucket-name.

Naming rules:

• Bucket names are unique throughout Object Storage, so you can't create two buckets with the same name (even in different folders in different clouds). Keep this in mind if you plan to create buckets automatically via the API.

• Bucket names are subject to the following restrictions:

  • The length of the name must be from 3 to 63 characters.
  • The name may contain lowercase Latin letters, numbers, hyphens, and periods.
  • The first and last characters must be letters or numbers.
  • Characters to the right and left of the period must be letters or numbers.
  • The name must not look like an IP address (for example, 10.1.3.9).

When selecting a bucket name, please keep in mind that names containing dots are used for hosting static websites. You may encounter a name conflict that prevents you or another user from hosting a website in Object Storage.

Bucket URL

You can use the following URL format to access a bucket:

• https://storage.yandexcloud.net/<bucket>?<parameters>
• http://<bucket>.storage.yandexcloud.net?<parameters>

Accessing a bucket via HTTPS

Object Storage supports secure connections over HTTPS. When accessing your buckets, use URLs in the format https://storage.yandexcloud.net/<bucket>?<parameters>.

When you use URLs in the format http://<bucket>.storage.yandexcloud.net?<parameters> HTTPS isn't available.

Read about HTTPS support when hosting websites in Object Storage under Static website hosting.

Bucket settings

You can:

• Limit the maximum size of a bucket.

  Object Storage doesn't let you upload objects if adding them exceeds the maximum bucket size.

• Set the default storage class.

  Objects uploaded to a bucket are by default saved with the storage class specified for that bucket.

• Configure a bucket for static website hosting.

• Uploading the CORS configuration for the bucket.

• Enable bucket encryption.

  By default, the objects added to the bucket are encrypted with the specified KMS key.

• Set up object lifecycles.

Bucket access

By default, buckets are created with restricted access, as set in the IAM. You can use the management console to enable public access:

• To read objects in a bucket.
• To access the list of objects in a bucket.
• To read settings:
  • CORS
  • Static website hosting
  • Object lifecycles

Public access to each operation is issued separately. In other words, if you have opened read-only access to your objects, anonymous users can't get the list of objects and bucket settings.

If necessary, you can configure permissions to the buckets and objects they contain using the ACL.

Guidelines and limitations

• A bucket can't be renamed.

• Object Storage performance doesn't depend on the number of buckets. You can store all your data in one or several buckets.

• Buckets can't be nested.

• You can only delete an empty bucket.

• It may take some time after deleting a bucket before you can create a new bucket with the same name. There is also a risk that another Yandex Cloud user might create a bucket with the name you've released before you claim it again. Don't delete buckets without a reason.

• When objects are uploaded in quick succession, the maximum specified bucket size can be exceeded.

• After deleting objects from a bucket, their storage capacity is considered occupied for some time.

  Note

  If you limit the maximum size of a bucket, it may remain unavailable for writes for some time, even if you free up enough space for new objects.