A bucket is a container used to store objects in Object Storage Service (OSS). All objects in OSS are stored in buckets. This topic describes how to create a bucket.
Usage notes
The sample code in this topic uses the region ID
cn-hangzhouof the China (Hangzhou) region. By default, the public endpoint is used to access resources in a bucket. If you want to access resources in the bucket from other Alibaba Cloud services in the same region in which the bucket is located, use an internal endpoint. For more information about OSS regions and endpoints, see Regions and endpoints.From 10:00 (UTC+8) on October 13, 2025, OSS will implement a phased adjustment across all regions to enable Block Public Access by default for new buckets created using the API, OSS SDKs, or ossutil. For details about the exact times when the adjustment will take effect in each region, see [Official Announcement] Adjustment to Public Access Blocking Configurations for Newly Created Buckets. Once Block Public Access is enabled, you cannot configure public access permissions, including public ACLs (public read and public read/write) and bucket policies that allows public access. You can disable this feature after the bucket is created if your business requires public access.
Examples
The following sample code provides an example on how to create a bucket named examplebucket:
# -*- coding: utf-8 -*-
import oss2
# The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in OSS is a high-risk operation. We recommend that you use a RAM user to call API operations or perform routine operations and maintenance. To create a RAM user, log on to the RAM console.
auth = oss2.Auth('yourAccessKeyId', 'yourAccessKeySecret')
# Specify the endpoint of the region in which the bucket is located. For example, if the bucket is located in the China (Hangzhou) region, set the endpoint to https://oss-cn-hangzhou.aliyuncs.com.
# Specify the name of the bucket. Example: examplebucket.
bucket = oss2.Bucket(auth, 'https://oss-cn-hangzhou.aliyuncs.com', 'examplebucket')
# Create the bucket.
# The following sample code provides an example on how to specify the storage class, access control list (ACL), and redundancy type when you create the bucket.
# In this example, the storage class is Standard, the ACL is private, and the redundancy type is zone-redundant storage (ZRS).
# bucketConfig = oss2.models.BucketCreateConfig(oss2.BUCKET_STORAGE_CLASS_STANDARD, oss2.BUCKET_DATA_REDUNDANCY_TYPE_ZRS)
# bucket.create_bucket(oss2.BUCKET_ACL_PRIVATE, bucketConfig)
bucket.create_bucket()