réduire les coûts de stockage avec des règles de cycle de vie à l'aide du SDK C - Object Storage Service

Les données chargées dans Object Storage Service (OSS) ne sont pas toutes consultées fréquemment. Certaines doivent toutefois être stockées dans une classe de stockage froid pour des raisons de conformité ou d'archivage. Dans d'autres scénarios, vous souhaiterez peut-être supprimer par lot les données devenues inutiles dans un bucket. Configurez des règles de cycle de vie basées sur la dernière date de modification pour faire passer périodiquement les objets des classes de stockage chaud vers des classes de stockage froid, ou pour les supprimer. Cette approche permet de réduire les coûts de stockage.

Notes

Avant de configurer des règles de cycle de vie basées sur la dernière date de modification des objets, assurez-vous de bien comprendre cette fonctionnalité. Pour plus d'informations, consultez la rubrique Règles de cycle de vie basées sur la dernière date de modification.

Cette rubrique utilise le point de terminaison public de la région Chine (Hangzhou). Si vous souhaitez accéder à OSS depuis d'autres services Alibaba Cloud situés dans la même région, utilisez un point de terminaison interne. Pour plus d'informations sur les régions et les points de terminaison OSS, consultez la rubrique Régions et points de terminaison.
Cette rubrique illustre la création d'une instance OSSClient avec un point de terminaison OSS. Pour d'autres configurations, telles que l'utilisation d'un nom de domaine personnalisé ou l'authentification via des identifiants issus du Security Token Service (STS), consultez la rubrique Initialisation (SDK C).
Pour configurer des règles de cycle de vie, vous devez disposer de l'autorisation oss:PutBucketLifecycle. Pour interroger les règles de cycle de vie, vous devez disposer de l'autorisation oss:GetBucketLifecycle. Pour supprimer les règles de cycle de vie, vous devez disposer de l'autorisation oss:DeleteBucketLifecycle. Pour plus d'informations, consultez la rubrique Accorder une stratégie personnalisée.

Définir des règles de cycle de vie

Le code suivant montre comment définir des règles de cycle de vie pour un bucket nommé examplebucket en fonction de la dernière date de modification. Après avoir défini les règles, si vous souhaitez en modifier une ou plusieurs, consultez la rubrique Comment modifier une ou plusieurs configurations de règles de cycle de vie ?.

#include "oss_api.h"
#include "aos_http_io.h"
/* Replace yourEndpoint with the Endpoint of the region where your bucket is located. For example, for the China (Hangzhou) region, the Endpoint is https://oss-cn-hangzhou.aliyuncs.com. */
const char *endpoint = "yourEndpoint";
/* Replace with your bucket name. For example, examplebucket. */
const char *bucket_name = "examplebucket";
/* Replace yourRegion with the ID of the region where your bucket is located. For example, for the China (Hangzhou) region, the region ID is cn-hangzhou. */
const char *region = "yourRegion";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Initialize an aos_string_t variable with a char* string. */
    aos_str_set(&options->config->endpoint, endpoint);
    /* Obtain access credentials from environment variables. Before you run this sample code, make sure the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID"));
    aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET"));
    // You must also configure the following two parameters.
    aos_str_set(&options->config->region, region);
    options->config->signature_version = 4;
    /* Specify whether to use a CNAME to access OSS. A value of 0 means that a CNAME is not used. */
    options->config->is_cname = 0;
    /* Set network parameters, such as the timeout period. */
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
    /* Call the aos_http_io_initialize method at the program entry point to initialize global resources, such as the network and memory. */
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        exit(1);
    }
    /* The memory pool (pool) for memory management is equivalent to apr_pool_t. The implementation is in the apr library. */
    aos_pool_t *pool;
    /* Create a memory pool. The second parameter is NULL, which indicates that the new memory pool does not inherit from another memory pool. */
    aos_pool_create(&pool, NULL);
    /* Create and initialize options. This parameter includes global configurations, such as endpoint, access_key_id, access_key_secret, is_cname, and curl. */
    oss_request_options_t *oss_client_options;
    /* Allocate memory for options in the memory pool. */
    oss_client_options = oss_request_options_create(pool);
    /* Initialize the client options, oss_client_options. */
    init_options(oss_client_options);
    /* Initialize parameters. */
    aos_string_t bucket;
    aos_table_t *resp_headers = NULL; 
    aos_status_t *resp_status = NULL; 
    aos_str_set(&bucket, bucket_name);
    aos_list_t lifecycle_rule_list;   
    aos_str_set(&bucket, bucket_name);
    aos_list_init(&lifecycle_rule_list);
    /* Specify the expiration in days. */
    oss_lifecycle_rule_content_t *rule_content_days = oss_create_lifecycle_rule_content(pool);
    aos_str_set(&rule_content_days->id, "rule-1");
    /* Set the object prefix. */
    aos_str_set(&rule_content_days->prefix, "dir1");
    aos_str_set(&rule_content_days->status, "Enabled");
    rule_content_days->days = 3;
    aos_list_add_tail(&rule_content_days->node, &lifecycle_rule_list);
    /* Specify the expiration date. */
    oss_lifecycle_rule_content_t *rule_content_date = oss_create_lifecycle_rule_content(pool);
    aos_str_set(&rule_content_date->id, "rule-2");
    aos_str_set(&rule_content_date->prefix, "dir2");
    aos_str_set(&rule_content_date->status, "Enabled");
    /* The expiration date must be in UTC format.
    aos_str_set(&rule_content_date->date, "2023-10-11T00:00:00.000Z");
    aos_list_add_tail(&rule_content_date->node, &lifecycle_rule_list);
    /* Set the lifecycle rule. */
    resp_status = oss_put_bucket_lifecycle(oss_client_options, &bucket, &lifecycle_rule_list, &resp_headers);
    if (aos_status_is_ok(resp_status)) {
        printf("put bucket lifecycle succeeded\n");
    } else {
        printf("put bucket lifecycle failed, code:%d, error_code:%s, error_msg:%s, request_id:%s\n",
            resp_status->code, resp_status->error_code, resp_status->error_msg, resp_status->req_id);
    }
    /* Release the memory pool. This releases the memory allocated to resources during the request. */
    aos_pool_destroy(pool);
    /* Release the previously allocated global resources. */
    aos_http_io_deinitialize();
    return 0;
}

Consulter les règles de cycle de vie

Le code suivant montre comment interroger les règles de cycle de vie configurées pour le bucket nommé examplebucket :

#include "oss_api.h"
#include "aos_http_io.h"
/* Replace yourEndpoint with the Endpoint of the region where your bucket is located. For example, for the China (Hangzhou) region, the Endpoint is https://oss-cn-hangzhou.aliyuncs.com. */
const char *endpoint = "yourEndpoint";
/* Replace with your bucket name. For example, examplebucket. */
const char *bucket_name = "examplebucket";
/* Replace yourRegion with the ID of the region where your bucket is located. For example, for the China (Hangzhou) region, the region ID is cn-hangzhou. */
const char *region = "yourRegion";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Initialize an aos_string_t variable with a char* string. */
    aos_str_set(&options->config->endpoint, endpoint);
    /* Obtain access credentials from environment variables. Before you run this sample code, make sure the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID"));
    aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET"));
    // You must also configure the following two parameters.
    aos_str_set(&options->config->region, region);
    options->config->signature_version = 4;
    /* Specify whether to use a CNAME to access OSS. A value of 0 means that a CNAME is not used. */
    options->config->is_cname = 0;
    /* Set network parameters, such as the timeout period. */
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
    /* Call the aos_http_io_initialize method at the program entry point to initialize global resources, such as the network and memory. */
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        exit(1);
    }
    /* The memory pool (pool) for memory management is equivalent to apr_pool_t. The implementation is in the apr library. */
    aos_pool_t *pool;
    /* Create a memory pool. The second parameter is NULL, which indicates that the new memory pool does not inherit from another memory pool. */
    aos_pool_create(&pool, NULL);
    /* Create and initialize options. This parameter includes global configurations, such as endpoint, access_key_id, access_key_secret, is_cname, and curl. */
    oss_request_options_t *oss_client_options;
    /* Allocate memory for options in the memory pool. */
    oss_client_options = oss_request_options_create(pool);
    /* Initialize the client options, oss_client_options. */
    init_options(oss_client_options);
    /* Initialize parameters. */
    aos_string_t bucket;
    aos_table_t *resp_headers = NULL; 
    aos_status_t *resp_status = NULL; 
    aos_list_t lifecycle_rule_list;
    oss_lifecycle_rule_content_t *rule_content;
    char *rule_id = NULL; 
    char *prefix = NULL; 
    char *status = NULL; 
    int days = INT_MAX;
    char* date = "";
    aos_str_set(&bucket, bucket_name);
    /* Get the lifecycle rules of the bucket. */
    aos_list_init(&lifecycle_rule_list);
    resp_status = oss_get_bucket_lifecycle(oss_client_options, &bucket, &lifecycle_rule_list, &resp_headers);
    if (aos_status_is_ok(resp_status)) {
        printf("get bucket lifecycle succeeded\n");
        aos_list_for_each_entry(oss_lifecycle_rule_content_t, rule_content, &lifecycle_rule_list, node) {
            rule_id = apr_psprintf(pool, "%.*s", rule_content->id.len, rule_content->id.data);
            prefix = apr_psprintf(pool, "%.*s", rule_content->prefix.len, rule_content->prefix.data);
            status = apr_psprintf(pool,"%.*s", rule_content->status.len, rule_content->status.data);
            date = apr_psprintf(pool, "%.*s", rule_content->date.len, rule_content->date.data);
            days = rule_content->days;
            printf("rule_id: %s \n", rule_id);
            printf("prefix: %s \n", prefix);
            printf("status: %s \n", status);
            printf("date: %s \n", date);
            printf("days: %d \n", days);
        }
    } else {
        printf("get bucket lifecycle failed, code:%d, error_code:%s, error_msg:%s, request_id:%s\n",
            resp_status->code, resp_status->error_code, resp_status->error_msg, resp_status->req_id);
    }
    /* Release the memory pool. This releases the memory allocated to resources during the request. */
    aos_pool_destroy(pool);
    /* Release the previously allocated global resources. */
    aos_http_io_deinitialize();
    return 0;
}

Supprimer toutes les règles de cycle de vie

Le code suivant montre comment effacer les règles de cycle de vie d'un bucket nommé examplebucket. Si vous souhaitez supprimer une ou plusieurs règles de cycle de vie, reportez-vous à la rubrique Supprimer des règles de cycle de vie.

#include "oss_api.h"
#include "aos_http_io.h"
/* Replace yourEndpoint with the Endpoint of the region where your bucket is located. For example, for the China (Hangzhou) region, the Endpoint is https://oss-cn-hangzhou.aliyuncs.com. */
const char *endpoint = "yourEndpoint";
/* Replace with your bucket name. For example, examplebucket. */
const char *bucket_name = "examplebucket";
/* Replace yourRegion with the ID of the region where your bucket is located. For example, for the China (Hangzhou) region, the region ID is cn-hangzhou. */
const char *region = "yourRegion";
void init_options(oss_request_options_t *options)
{
    options->config = oss_config_create(options->pool);
    /* Initialize an aos_string_t variable with a char* string. */
    aos_str_set(&options->config->endpoint, endpoint);
    /* Obtain access credentials from environment variables. Before you run this sample code, make sure the OSS_ACCESS_KEY_ID and OSS_ACCESS_KEY_SECRET environment variables are set. */
    aos_str_set(&options->config->access_key_id, getenv("OSS_ACCESS_KEY_ID"));
    aos_str_set(&options->config->access_key_secret, getenv("OSS_ACCESS_KEY_SECRET"));
    // You must also configure the following two parameters.
    aos_str_set(&options->config->region, region);
    options->config->signature_version = 4;
    /* Specify whether to use a CNAME to access OSS. A value of 0 means that a CNAME is not used. */
    options->config->is_cname = 0;
    /* Set network parameters, such as the timeout period. */
    options->ctl = aos_http_controller_create(options->pool, 0);
}
int main(int argc, char *argv[])
{
    /* Call the aos_http_io_initialize method at the program entry point to initialize global resources, such as the network and memory. */
    if (aos_http_io_initialize(NULL, 0) != AOSE_OK) {
        exit(1);
    }
    /* The memory pool (pool) for memory management is equivalent to apr_pool_t. The implementation is in the apr library. */
    aos_pool_t *pool;
    /* Create a memory pool. The second parameter is NULL, which indicates that the new memory pool does not inherit from another memory pool. */
    aos_pool_create(&pool, NULL);
    /* Create and initialize options. This parameter includes global configurations, such as endpoint, access_key_id, access_key_secret, is_cname, and curl. */
    oss_request_options_t *oss_client_options;
    /* Allocate memory for options in the memory pool. */
    oss_client_options = oss_request_options_create(pool);
    /* Initialize the client options, oss_client_options. */
    init_options(oss_client_options);
    /* Initialize parameters. */
    aos_string_t bucket;
    aos_table_t *resp_headers = NULL; 
    aos_status_t *resp_status = NULL; 
    aos_str_set(&bucket, bucket_name);
    /* Delete the lifecycle rules of the bucket. */
    aos_str_set(&bucket, bucket_name);
    resp_status = oss_delete_bucket_lifecycle(oss_client_options, &bucket, &resp_headers);
    if (aos_status_is_ok(resp_status)) {
        printf("delete bucket lifecycle succeeded\n");
    } else {
        printf("delete bucket lifecycle failed, code:%d, error_code:%s, error_msg:%s, request_id:%s\n",
            resp_status->code, resp_status->error_code, resp_status->error_msg, resp_status->req_id);
    }
    /* Release the memory pool. This releases the memory allocated to resources during the request. */
    aos_pool_destroy(pool);
    /* Release the previously allocated global resources. */
    aos_http_io_deinitialize();
    return 0;
}

Références

Pour plus d'informations sur l'opération API permettant de définir des règles de cycle de vie, consultez la rubrique PutBucketLifecycle.
Pour plus d'informations sur l'opération API permettant de consulter les règles de cycle de vie, consultez la rubrique GetBucketLifecycle.
Pour plus d'informations sur l'opération API permettant de supprimer toutes les règles de cycle de vie, consultez la rubrique DeleteBucketLifecycle.