Configuring Lifecycle Rules for a Bucket (SDK for Node.js)

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Function

You can configure lifecycle rules to periodically delete objects or transition objects between storage classes. For more information, see Lifecycle Management.

This API configures lifecycle rules for a bucket.

Expired objects will be permanently deleted and cannot be restored.
Multi-AZ redundancy is not available for Archive storage. For this reason, buckets or objects with multi-AZ redundancy cannot be transitioned to the Archive storage class based on a lifecycle rule.
The minimum storage duration is 30 days for Infrequent Access storage and 90 days for Archive storage. After an object is transitioned to the Archive storage class, if it stays in this storage class for less than 90 days, you still need to pay for a full 90 days.

Restrictions

There is no limit on the number of lifecycle rules in a bucket, but the total size of XML descriptions of all lifecycle rules in a bucket cannot exceed 20 KB.
A maximum of 20 lifecycle rules can be configured for a parallel file system.
To configure a lifecycle rule for a bucket, you must be the bucket owner or have the required permission (obs:bucket:PutLifecycleConfiguration in IAM or PutLifecycleConfiguration in a bucket policy). For details, see Introduction to OBS Access Control, IAM Custom Policies, and Creating a Custom Bucket Policy.

Method

ObsClient.setBucketLifecycle(params)

Request Parameters

**Table 1** List of request parameters
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 with 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 can contain 3 to 63 characters. Default value: None
Rules	LifecycleRule[]	Yes	Explanation: Lifecycle rules of the bucket Restrictions: There is no limit on the number of lifecycle rules in a bucket, but the total size of XML descriptions of all lifecycle rules in a bucket cannot exceed 20 KB. A maximum of 20 lifecycle rules can be configured for a parallel file system. Value range: See Table 2. Default value: None

**Table 2** LifecycleRule
Parameter	Type	Mandatory (Yes/No)	Description
ID	string	No if used as a request parameter	Explanation: Lifecycle rule ID. Restrictions: None Value range: The value must contain 1 to 255 characters. Default value: None
Prefix	string	Yes if used as a request parameter	Explanation: Object name prefix. It identifies the objects the rule applies to. You can leave this parameter blank to apply the rule to all objects in the bucket. Assume that you have the following objects: logs/day1, logs/day2, logs/day3, and ExampleObject.jpg. If you set Prefix to ExampleObject.jpg, the rule applies to object ExampleObject.jpg alone. If you set Prefix to logs/, the rule applies to objects logs/day1, logs/day2, and logs/day3. If you leave Prefix blank, the rule applies to all objects in the bucket. Restrictions: None Value range: The value can contain 1 to 1,024 characters. Default value: None
Status	string	Yes if used as a request parameter	Explanation: Whether the current rule is enabled. Restrictions: None Value range: Enabled Disabled Default value: None
Transitions	Transition[]	No if used as a request parameter	Explanation: Policies for storage class transition, including transition time and the storage class after transition. Restrictions: This parameter is only available for the latest object version. Value range: See Table 3. Default value: None
Expiration	Expiration	No if used as a request parameter	Explanation: Expiration time of an object. Restrictions: This parameter is only available for the latest object version. Value range: See Table 4. Default value: None
NoncurrentVersionTransitions	NoncurrentVersionTransition[]	No if used as a request parameter	Explanation: Policies for storage class transition of historical versions, including transition time and the storage class after transition. Restrictions: This parameter is only available for historical object versions. Versioning must be enabled (or suspended after being enabled) for the bucket. Value range: See Table 5. Default value: None
NoncurrentVersionExpiration	NoncurrentVersionExpiration	No if used as a request parameter	Explanation: Expiration time of historical object versions Restrictions: This parameter is only available for historical object versions. Versioning must be enabled (or suspended after being enabled) for the bucket. This parameter is not available for parallel file systems. Value range: See Table 6. Default value: None

Transitions, Expiration, NoncurrentVersionTransitions, and NoncurrentVersionExpiration cannot be left blank at the same time.

**Table 3** Transition
Parameter	Type	Mandatory (Yes/No)	Description
StorageClass	StorageClassType	Yes if used as a request parameter	Explanation: Storage class of the object after transition Restrictions: The Standard storage class is not supported. Restrictions on storage class transitions: Only transitions from the Standard storage class to the Infrequent Access storage class are supported. To transition objects from Infrequent Access to Standard, you must manually do it. Only transitions from the Standard or Infrequent Access storage class to the Archive storage class are supported. To transition objects from Archive to Standard or Infrequent Access, you must first restore these objects and then manually transition their storage classes. Multi-AZ redundancy is not available for the Archive storage. For this reason, buckets or objects with multi-AZ redundancy cannot be transitioned to the Archive storage class based on a lifecycle rule. Value range: See Table 7. Default value: None
Date	string	Yes if this parameter is used as a request parameter and Days is absent	Explanation: OBS executes the lifecycle rule for objects that were modified before the specified date. Restrictions: The value must conform with the ISO8601 standards and indicate UTC 00:00. For example, 2018-01-01T00:00:00.000Z indicates only objects that were last modified before the specified time are transitioned to the specified storage class. Value range: None Default value: None
Days	number	Yes if this parameter is used as a request parameter and Date is absent	Explanation: How many days can pass since the last update before the lifecycle rule takes effect Restrictions: This parameter is only available for the latest object version. Value range: 0 to (2³¹ – 1), in days Default value: None

**Table 4** Expiration
Parameter	Type	Mandatory (Yes/No)	Description
Date	string	Yes if this parameter is used as a request parameter and Days is absent	Explanation: OBS executes the lifecycle rule (deletion) for objects that were modified before the specified date. Restrictions: The value must conform with the ISO8601 standards and indicate UTC 00:00. For example, 2018-01-01T00:00:00.000Z indicates only objects that were last modified before the specified time are deleted. Value range: None Default value: None
Days	number	Yes if this parameter is used as a request parameter and Date is absent	Explanation: How many days can pass since the last update before the lifecycle rule (deletion) takes effect Restrictions: This parameter is only available for the latest object version. Value range: 1 to (2³¹ – 1), in days Default value: None

**Table 5** NoncurrentVersionTransition
Parameter	Type	Mandatory (Yes/No)	Description
StorageClass	StorageClassType	Yes if used as a request parameter	Explanation: Storage class of historical object versions after transition Restrictions: The Standard storage class is not supported. Restrictions on storage class transitions: Only transitions from the Standard storage class to the Infrequent Access storage class are supported. To transition objects from Infrequent Access to Standard, you must manually do it. Only transitions from the Standard or Infrequent Access storage class to the Archive storage class are supported. To transition objects from Archive to Standard or Infrequent Access, you must first restore these objects and then manually transition their storage classes. Multi-AZ redundancy is not available for Archive storage. For this reason, buckets or objects with multi-AZ redundancy cannot be transitioned to the Archive storage class based on a lifecycle rule. Value range: See Table 7. Default value: None
NoncurrentDays	number	Yes if used as a request parameter	Explanation: Number of days an object is historical before the specified rule takes effect Restrictions: This parameter is only available for historical object versions. Value range: 0 to (2³¹ – 1), in days Default value: None

**Table 6** NoncurrentVersionExpiration
Parameter	Type	Mandatory (Yes/No)	Description
NoncurrentDays	number	Yes if used as a request parameter	Explanation: Number of days an object is historical before the specified rule takes effect Restrictions: This parameter is only available for historical object versions. Value range: 0 to (2³¹ – 1), in days Default value: None

**Table 7** StorageClassType
Constant	Default Value	Description
ObsClient.enums.StorageClassStandard	STANDARD	Standard storage class. 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.
ObsClient.enums.StorageClassWarm	WARM	Infrequent Access storage class. Used for storing data that is semi-frequently accessed (fewer than 12 times a year) but becomes instantly available when needed.
ObsClient.enums.StorageClassCold	COLD	Archive storage class. Used for storing rarely accessed (once a year) data.

Responses

**Table 8** Responses
Type	Description
Table 9 NOTE: This API returns a Promise response, which requires the Promise or async/await syntax.	Explanation: Returned results. For details, see Table 9.

**Table 9** Response
Parameter	Type	Description
CommonMsg	ICommonMsg	Explanation: Common information generated after an API call is complete, including the HTTP status code and error code. For details, see Table 10.
InterfaceResult	Table 11	Explanation: Results outputted for a successful call. For details, see Table 11. Restrictions: This parameter is not included if the value of Status is greater than 300.

**Table 10** ICommonMsg
Parameter	Type	Description
Status	number	Explanation: HTTP status code returned by the OBS server. Value range: A status code is a group of digits indicating the status of a response. It ranges from 2xx (indicating successes) to 4xx or 5xx (indicating errors). For details, see Status Codes.
Code	string	Explanation: Error code returned by the OBS server.
Message	string	Explanation: Error description returned by the OBS server.
HostId	string	Explanation: Request server ID returned by the OBS server.
RequestId	string	Explanation: Request ID returned by the OBS server.
Id2	string	Explanation: Request ID2 returned by the OBS server.
Indicator	string	Explanation: Error code details returned by the OBS server.

**Table 11** BaseResponseOutput
Parameter	Type	Description
RequestId	string	Explanation: Request ID returned by the OBS server

Code Examples: Setting an Object Transition Policy

This example sets lifecycle rules to specify transition policies for latest and historical versions of objects in bucket examplebucket.

Code Examples: Setting an Object Expiration Time

This example sets lifecycle rules to specify expiration time for latest and historical versions of objects in bucket examplebucket.

   
    
      
      
        // Import the OBS library.
// Use npm to install the client.
const ObsClient = require("esdk-obs-nodejs");
// Use the source code to install the client.
// var ObsClient = require('./lib/obs');

// Create an instance of ObsClient.
const obsClient = new ObsClient({
  // 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/eu/usermanual-ca/ca_01_0003.html.
  access_key_id: process.env.ACCESS_KEY_ID,
  secret_access_key: process.env.SECRET_ACCESS_KEY,
  // (Optional) If you use a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage. You can obtain an AK/SK pair using environment variables or import an AK/SK pair in other ways.
  // security_token: process.env.SECURITY_TOKEN,
  // Enter the endpoint corresponding to the region where the bucket is located. EU-Dublin is used here in this example. Replace it with the one currently in use.
  server: "https://obs.eu-west-101.myhuaweicloud.eu"
});

async function setBucketLifecycle() {
  try {
    const params = {
      // Specify the bucket name.
      Bucket: "examplebucket",
      // Lifecycle rules
      Rules: [
        {
            ID:'rule1',Prefix:'prefix1',Status:'Enabled',
            // Specify that objects whose names contain the specified prefix will expire 60 days after creation.
            Expiration:{Days:60},
            // Specify that objects whose names contain the prefix will expire 60 days after becoming historical.
            NoncurrentVersionExpiration:{NoncurrentDays : 60}
        },
        {
            ID:'rule2',Prefix:'prefix2',Status:'Enabled',
            // Specify when the objects whose names contain the specified prefix will expire. The value must conform to the ISO8601 standard. The time value must be 00:00:00 in UTC.
            Expiration:{Date: '2018-12-31T00:00:00Z'},
        }

      ]
    };
    // Configure lifecycles.
    const result = await obsClient.setBucketLifecycle(params);
    if (result.CommonMsg.Status <= 300) {
      console.log("Set bucket(%s)'s lifecycle configuraion successful!", params.Bucket);
      console.log("RequestId: %s", result.CommonMsg.RequestId);
      return;
    };
    console.log("An ObsError was found, which means your request sent to OBS was rejected with an error response.");
    console.log("Status: %d", result.CommonMsg.Status);
    console.log("Code: %s", result.CommonMsg.Code);
    console.log("Message: %s", result.CommonMsg.Message);
    console.log("RequestId: %s", result.CommonMsg.RequestId);
  } catch (error) {
    console.log("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.");
    console.log(error);
  };
};

setBucketLifecycle();

       

     

   
  