How to create a bucket - Object Storage Service - Alibaba Cloud Documentation Center

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.

Notes

Before you run the sample code in this topic, you must create an OSSClient instance using a method such as a custom domain name or Security Token Service (STS). For more information, see Initialize an OSSClient instance for Android.
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 the 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.

Permissions

By default, an Alibaba Cloud account has full permissions. RAM users or RAM roles under an Alibaba Cloud account do not have any permissions by default. The Alibaba Cloud account or account administrator must grant operation permissions through RAM Policy or Bucket policies.

API	Action	Definition
PutBucket	`oss:PutBucket`	Creates a bucket.
PutBucket	`oss:PutBucketAcl`	After creating a bucket, this permission is required to modify the bucket ACL.

Sample code

The following code shows how to create a bucket named examplebucket.

Note

The region of the bucket is determined by the region of the endpoint that you specify during initialization.

// Construct a request to create a bucket.
// Specify the bucket name.
CreateBucketRequest createBucketRequest = new CreateBucketRequest("examplebucket");
// Specify the access control list (ACL) of the bucket.
// createBucketRequest.setBucketACL(CannedAccessControlList.Private);
// Specify the storage class of the bucket.
// createBucketRequest.setBucketStorageClass(StorageClass.Standard);

// Create the bucket asynchronously.
OSSAsyncTask createTask = oss.asyncCreateBucket(createBucketRequest, new OSSCompletedCallback<CreateBucketRequest, CreateBucketResult>() {
    @Override
    public void onSuccess(CreateBucketRequest request, CreateBucketResult result) {
        Log.d("asyncCreateBucket", "Success");
    }
    @Override
    public void onFailure(CreateBucketRequest request, ClientException clientException, ServiceException serviceException) {
        // Request exception.
        if (clientException != null) {
            // Client-side exceptions, such as network errors.
            clientException.printStackTrace();
        }
        if (serviceException != null) {
            // Server-side exceptions.
            Log.e("ErrorCode", serviceException.getErrorCode());
            Log.e("RequestId", serviceException.getRequestId());
            Log.e("HostId", serviceException.getHostId());
            Log.e("RawMessage", serviceException.getRawMessage());
        }
    }
});

References

For the complete sample code for creating a bucket, see the GitHub example.
For more information about the API operation for creating a bucket, see PutBucket.
For more information about how to initialize an OSSClient instance, see Initialize an OSSClient instance for Android.