Creating a Bucket

If you have any questions during development, post them on the Issues page of GitHub.

You can call create_bucket or create_bucket_with_params to create a bucket for object storage.

Parameter Description

Field	Type	Mandatory or Optional	Description
option	The context of the bucket. For details, see Configuring option.	Mandatory	Bucket parameter
canned_acl	obs_canned_acl. See Managing Bucket ACLs.	Mandatory	Access control policy
location_constraint	char *	Optional	The region where a bucket is to be created
handler	obs_response_handler *	Mandatory	Callback function
callback_data	void *	Optional	Callback data
param	obs_create_bucket_params *	Mandatory	This field is used only in the create_bucket_with_params interface. The body contains: obs_canned_acl canned_acl: permission control policy obs_az_redundancy az_redundancy: multi-AZ or single-AZ Single-AZ: OBS_REDUNDANCY_1AZ 3-AZ: OBS_REDUNDANCY_3AZ *const char location_constraint**: region where the bucket resides. To create a 3-AZ bucket, you need to specify a region that supports 3-AZ storage.

Sample Code

The following code shows how to create a bucket for object storage:
static void test_create_bucket(obs_canned_acl canned_acl, char *bucket_name)
{
    // Create and initialize option.
    obs_options option;
    obs_status ret_status = OBS_STATUS_BUTT;
    init_obs_options(&option);

    option.bucket_options.host_name = "<your-endpoint;
    option.bucket_options.bucket_name = "<Your bucketname>";
    
// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY.
    // Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
    option.bucket_options.access_key = getenv("ACCESS_KEY_ID");
    option.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY");

    // Set the response callback function.
    obs_response_handler response_handler =
    { 
        0, &response_complete_callback
    };
    // Create a bucket. For details about the predefined access policy, see section "Managing Bucket ACLs".
    create_bucket(&option, "<bucket ACL>", NULL, &response_handler, &ret_status);
    if (ret_status == OBS_STATUS_OK) {
        printf("create bucket successfully. \n");
    }
    else
    {
        printf("create bucket failed(%s).\n", obs_get_status_name(ret_status));
    }
}

The following code shows how to create a 3-AZ bucket:
static void test_create_3az_bucket(obs_canned_acl canned_acl, char *bucket_name)
{
    // Create and initialize option.
    obs_options option;
    obs_status ret_status = OBS_STATUS_BUTT;
    init_obs_options(&option);

    option.bucket_options.host_name = "<your-endpoint;
    option.bucket_options.bucket_name = "<Your bucketname>";
    // Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY.     // Obtain an AK/SK pair on the management console.
    option.bucket_options.access_key = getenv("ACCESS_KEY_ID");
    option.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY");

       // Set response callback function.
    obs_response_handler response_handler =
    { 
        0, &response_complete_callback
    };
    // Create a bucket. For details about the predefined access policy, see section "Managing Bucket ACLs". 
    obs_create_bucket_params create_param;
    create_param.canned_acl = canned_acl;
    create_param.location_constraint = "Region name that support 3AZ";
    create_param.az_redundancy = OBS_REDUNDANCY_3AZ;
    create_bucket_with_params(&option, &create_param, &response_handler, &ret_status);
    if (ret_status == OBS_STATUS_OK) {
        printf("create bucket with params successfully. \n");
    }
    else
    {
        printf("create bucket with params failed(%s).\n", obs_get_status_name(ret_status));
    }
}
.

Bucket names are globally unique. Ensure that the bucket you create is named differently from any other bucket. A bucket name must comply with the following rules:

Contains 3 to 63 characters, starts with a digit or letter, and supports only lowercase letters, digits, hyphens (-), and periods (.)
Cannot be an IP address.
Cannot start or end with a hyphen (-) or period (.).
Cannot contain two consecutive periods (.), for example, my..bucket.
Cannot contain periods (.) and hyphens (-) adjacent to each other, for example, my-.bucket or my.-bucket.
If you create buckets of the same name in a region, no error will be reported and the bucket properties comply with those set in the first creation request.

The bucket created in the previous example is of the default ACL (private), in the OBS Standard storage class, and in the default location where the global domain resides.

During bucket creation, if the endpoint you use corresponds to the default region EU-Dublin (eu-west-101), specifying a region is not a must. If the endpoint you use corresponds to any other region, except the default one, you must set the region to the one that the used endpoint corresponds to.

Creating a Bucket with Parameters Specified

When creating a bucket, you can specify the ACL, storage class, and location for the bucket. OBS provides three storage classes for buckets. For details, see Storage Class. Sample codes are as follows:

obs_status ret_status = OBS_STATUS_BUTT;

// Create and initialize option.
obs_options option;
init_obs_options(&option);
option.bucket_options.host_name = "<your-endpoint>";
option.bucket_options.bucket_name = "<Your bucketname>";

// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
option.bucket_options.access_key = getenv("ACCESS_KEY_ID");
option.bucket_options.secret_access_key = getenv("SECRET_ACCESS_KEY");

    // Set response callback function.
obs_response_handler response_handler =
{ 
    0, &response_complete_callback
};
// Set the storage class for a bucket.
option.bucket_options.storage_class = "<Your bucket storage policy>";

// Create a bucket. The predefined access policy and location of the bucket can be set for the input parameter.
create_bucket(&option, "<bucket ACL>", "<Your bucket location>", &response_handler, &ret_status);
if (ret_status == OBS_STATUS_OK) {
    printf("create bucket successfully. \n");
}
else
{
    printf("create bucket failed(%s).\n", obs_get_status_name(ret_status));
}