Help Center/ Object Storage Service/ SDK Reference/ Go/ Buckets (SDK for Go)/ Configuring Storage Class for a Bucket (SDK for Go)
Updated on 2024-06-21 GMT+08:00

Configuring Storage Class for a Bucket (SDK for Go)

Function

OBS offers the following storage classes: Standard, Infrequent Access, and Archive. For details, see Storage Classes.

This API configures a storage class for a bucket. If you do not specify a storage class when uploading or copying an object, or initiating a multipart upload, the object will inherit the bucket's storage class.

Restrictions

Method

func (obsClient ObsClient) SetBucketStoragePolicy(input *SetBucketStoragePolicyInput) (output *BaseModel, err error)

Request Parameters

Table 1 List of request parameters

Parameter

Type

Mandatory (Yes/No)

Description

input

*SetBucketStoragePolicyInput

Yes

Explanation:

Input parameters for configuring a bucket storage class. For details, see Table 2.

Table 2 SetBucketStoragePolicyInput

Parameter

Type

Mandatory (Yes/No)

Description

Bucket

string

Yes

Explanation:

Bucket name

Restrictions:

  • A bucket name must be unique across all accounts and regions.
  • A bucket name:
    • Must be 3 to 63 characters long and start with a digit or letter. Lowercase letters, digits, hyphens (-), and periods (.) are allowed.
    • Cannot be formatted as an IP address.
    • Cannot start or end with a hyphen (-) or period (.).
    • Cannot contain two consecutive periods (..), for example, my..bucket.
    • Cannot contain a period (.) and a hyphen (-) adjacent to each other, for example, my-.bucket or my.-bucket.
  • If you repeatedly create buckets of the same name in the same region, no error will be reported and the bucket attributes comply with those set in the first creation request.

Value range:

The value must contain 3 to 63 characters.

Default value:

None

StorageClass

StorageClassType

Yes

Explanation:

Storage class of the bucket

Value range:

For details about storage classes, see Table 3.

Default value:

None

Table 3 StorageClassType

Constant

Default Value

Description

StorageClassStandard

STANDARD

OBS Standard

Features low access latency and high throughput and is used for storing massive, frequently accessed (multiple times a month) or small objects (< 1 MB) requiring quick response.

StorageClassWarm

WARM

OBS Infrequent Access

Used for storing data that is semi-frequently accessed (fewer than 12 times a year) but is instantly available when needed.

StorageClassCold

COLD

OBS Archive

Used for storing rarely accessed (once a year) data.

Responses

Table 4 List of returned results

Parameter

Type

Description

output

*BaseModel

Explanation:

Returned results. For details, see Table 5.

err

error

Explanation:

Error messages returned by the API

Table 5 BaseModel

Parameter

Type

Description

StatusCode

int

Explanation:

HTTP status code

Value range:

A status code is a group of digits that can be 2xx (indicating successes) or 4xx or 5xx (indicating errors). It indicates the status of a response. For more information, see Status Code.

Default value:

None

RequestId

string

Explanation:

Request ID returned by the OBS server

Default value:

None

ResponseHeaders

map[string][]string

Explanation:

HTTP response headers

Default value:

None

Code Examples

This example returns the storage class of bucket examplebucket.

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package main
import (
    "fmt"
    "os"
    obs "github.com/huaweicloud/huaweicloud-sdk-go-obs/obs"
)
func main() {
    //Obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways. Using hard coding may result in leakage.
    //Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
    ak := os.Getenv("AccessKeyID")
    sk := os.Getenv("SecretAccessKey")
    // (Optional) If you use a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding to reduce leakage risks. You can obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways.
    // securityToken := os.Getenv("SecurityToken")
    // Enter the endpoint corresponding to the bucket. CN-Hong Kong is used here as an example. Replace it with the one currently in use.
    endPoint := "https://obs.ap-southeast-1.myhuaweicloud.com"
    // Create an obsClient instance.
    // If you use a temporary AK/SK pair and a security token to access OBS, use the obs.WithSecurityToken method to specify a security token when creating an instance.
    obsClient, err := obs.New(ak, sk, endPoint/*, obs.WithSecurityToken(securityToken)*/)
    if err != nil {
        fmt.Printf("Create obsClient error, errMsg: %s", err.Error())
    }
    input := &obs.SetBucketStoragePolicyInput{}
    // Specify a bucket name.
    input.Bucket = "bucketname"
    // Specify a storage class (obs.StorageClassWarm as an example) for the bucket.
    input.StorageClass = obs.StorageClassWarm
    // Configure a storage class for the bucket.
    output, err := obsClient.SetBucketStoragePolicy(input)
    if err == nil {
        fmt.Printf("Set bucket(%s)'s storage-class successful!\n", input.Bucket)
        fmt.Printf("Set bucket storage-class successful!\n")
        fmt.Printf("RequestId:%s\n", output.RequestId)
        return
    }
    fmt.Printf("Set bucket(%s)'s storage-class fail!\n", input.Bucket)
    if obsError, ok := err.(obs.ObsError); ok {
        fmt.Println("An ObsError was found, which means your request sent to OBS was rejected with an error response.")
        fmt.Println(obsError.Error())
    } else {
        fmt.Println("An Exception was found, which means the client encountered an internal problem when attempting to communicate with OBS, for example, the client was unable to access the network.")
        fmt.Println(err)
    }
}