It is possible to configure a lifecycle of a group of objects so that their storage costs can effectively be managed. A lifecycle configuration is a set of rules that defines actions applied to a group of objects stored on Object Storage.
Currently the expiration and transition actions are supported on the platform:
There might be for example a need to store log files for a week or a month, after which they become obsolete. It is possible to set a lifecyle rule to delete them automatically when they become obsolete. Also, if you consider that a 3-month old object is rarely used but still has a value, you might want configure a rule to send it automatically to C14 Cold Storage, for example.
Lifecyle Management on Object Storage is available on every AWS S3 compliant tool (sdk, aws-cli, boto, etc), as well as from the Scaleway management console.
A lifecycle configuration is an XML file, containing a set of rules with predefined actions that you want Object Storage to perform on objects during their lifetime:
<LifecycleConfiguration> <Rule> ... </Rule> <Rule> ... </Rule> ... </LifecycleConfiguration>
Rule consists of the following:
Filteridentifying a subset of objects to which the rule applies.
Statuswhether the rule is in effect (A rule can be present but
Rule: Child of
Container for a lifecycle rule. There is a limit of thousand (1000) rules per bucket.
Filter: Child of
Container for elements that describe that identifies the subset of object the rule applies for. If the content of the tag is empty, the rule applies to all objects in the bucket.
And: Child of
Container for chaining rule filters. For example:
<And> <Prefix>myprefix</Prefix> <Tag> <Key>mytagkey1</Key> <Value>mytagvalue1</Value> </Tag> </And>
Which applies the
Prefix rule and the
Prefix: Child of
Object key prefix identifying one or more objects to which the rule applies. Object Storage does limit this token to 1 per
Tag: Child of
Container for specifying a
Key and a
Status: Child of
Describes whether or not a rule is to be enabled. Values:
Transition: Child of
Specifies a period and a destination for an object lifetime
Days: Child of
Transition and / or
Specifies the number of days after object creation when the rule takes effect.
StorageClass: Child of
Specifies the Storage Class to which the object shall be transfered to.
On the Scaleway Elements platform the storage classes
GLACIER are available.
Expiration: Child of
Describe a period in the objet’s lifetime for a deletion. If versioning is enabled, this rule shall only delete the current version of an object.
ID: Child of
Unique identifier for the rule. This value is limited to 255 characters.
<LifecycleConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Rule> <ID>id-1</ID> <Expiration> <Days>1</Days> </Expiration> <Filter> <And> <Prefix>myprefix</Prefix> <Tag> <Key>mytagkey1</Key> <Value>mytagvalue1</Value> </Tag> <Tag> <Key>mytagkey2</Key> <Value>mytagvalue2</Value> </Tag> </And> </Filter> <Status>Enabled</Status> </Rule> </LifecycleConfiguration>
The lifecycle configuration above translates to the following effective rules:
On this rule named “id-1”, we set the objects with the ‘myprefix’ Prefix and the tags ‘mytagkey1’, ‘mytagkey2’ sets to ‘mytagvalue1’ and ‘mytagvalue2’ to expire after one day.
PUT /?lifecycle HTTP/1.1 Host: bucketname.s3.nl-ams.scw.cloud Content-MD5: e0d656aa8bed46fe766420c6d21537d5 Authorization: authorization string <LifecycleConfiguration> <Rule> <ID>ExampleRule</ID> <Filter> <Prefix>documents/</Prefix> </Filter> <Status>Enabled</Status> <Expiration> <Days>30</Days> </Expiration> </Rule> </LifecycleConfiguration>
HTTP/1.1 200 OK
GET /?lifecycle HTTP/1.1 Host: bucketname.s3.nl-ams.scw.cloud Authorization: authorization string
HTTP/1.1 200 OK x-amz-id-2: txda274593e2dc4974a82cc-005cdbe130 x-amz-request-id: txda274593e2dc4974a82cc-005cdbe130 Date: Wed, 15 May 2019 09:51:44 GMT Content-Length: 238 <?xml version="1.0" encoding="UTF-8"?> <LifecycleConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> <Rule> <ID>ExampleRule</ID> <Filter> <Prefix>documents/</Prefix> </Filter> <Status>Enabled</Status> <Expiration> <Days>30</Days> </Expiration> </Rule> </LifecycleConfiguration>
DELETE /?lifecycle HTTP/1.1 Host: bucketname.s3.nl-ams.scw.cloud Authorization: authorization string
204 No Content Content-Length: 0 Date: Wed, 15 May 2019 09:59:29 GMT
Via the Scaleway Console, you can either transfer objects to
GLACIER class [manually] (https://www.scaleway.com/en/docs/object-storage-glacier/#-Uploading-Data-to-Glacier-from-the-Scaleway-Console) or automatically with lifecycle rules. These rules also allow users to set expiration dates for objects and object versions.
1 . Access your Object Storage bucket of choice on the Scaleway Console, click on the bucket name and then on Lifecycle Rules.
2 . Click on + Create Lifecycle Rule to add a rule.
3 . Choose a name for the rule.
4 . Filter the objects you want the rule to be applied to by one or both of the following criteria:
Prefix - this criteria is based on the object name. The defined rule will be applied to all objects with the same name prefix. Tags - comprised of a « Key » and a « Value » associated to the Key. These tags should be defined prior to the rule creation, for either a bucket or an object. You can add one tag or more to your filter.
If you wish to change the storage class of two or more objects at a time, you can set up a transition rule that will automate the process.
5 . Tick the box if you wish to transfer the current version of the objects to
GLACIER a number of days after its creation. Click on - or + to ajust the timeframe, or type in the exact amount.
Expiration rules work in similar fashion, objects can be set to be permanently deleted after a given period of time.
7 . Tick or leave boxes empty for each case according to your preference.
A summary of your rule preferences displays on the bottom of the Expiration Rules step page, as such:
8 . Check that all settings are correct and click on Create Lifecycle Rule to conclude.
A list of all bucket lifecycle rules displays.
1 . If you wish to disable a rule, open … on the right hand side of the rule in question and click Disable.
2 . A confirmation window pops up. Enter Disable Rule if you wish to pursue the action.
Once disabled, a bucket’s lifecycle rule remains listed and can be enabled once more by clicking on … and then Activate.
If you wish to permanently delete a rule, click on … and then Delete.