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Lifecycle policy specification includes:

  • Cluster setting

  • Policy header on domain objects (optional)

  • Policy headers on bucket objects

Cluster Setting Values

The Swarm cluster setting policy.lifecycle supports two values:

  • disabled – A default value for the evaluation of all lifecycle policies in the cluster to provide legacy behavior.

  • enabled – Either enable or disable lifecycle policies at the domain level for domains where such policies are applied.

Use Management API for policy.lifecycle setting.

Domain Setting Values

Domain objects support a Policy-Lifecycle header to control the behavior of lifecycle policies for buckets in the domain. The header supports either of the following values:

  • <unspecified> – The lack of a defined policy header represents that lifecycle policies are enabled for buckets in the domain when the policy.lifecycle setting is enabled. Applying lifecycle policy at the domain level is optional.

  • enabled – The lifecycle policies are enabled for buckets in a domain when the policy.lifecycle cluster setting is enabled.

  • disabled – The lifecycle policies are disabled for buckets in a domain regardless of policy.lifecycle setting.

Info

Info

Lifecycle policy is not applied to unnamed content within a domain. Only named objects within buckets contains lifecycle policy applied.

Bucket Setting Values

Bucket objects support a Policy-Lifecycle header with multiple values.

  • Each header value encodes one lifecycle policy rule.

  • Each lifecycle rule is comprised of a number of optional attributes, expressed as <name>:<value> pairs separated by space. Extra spaces are allowed at the beginning, end, and before & after the colon.

Info

Important

  • Duplicate names are not allowed across lifecycle rules for a bucket.

  • Unsupported names or values return an HTTP 400 error on the bucket (or domain) write. The 400 response indicates the source of the problem.

Supported Rule Attributes

Attribute

Value

Definition

RuleId

<unique rule id>

A required, user-defined ID of the rule. The value is contained within quotes and must be URL-encoded. Duplicate rule ids (on different Policy-Lifecycle headers) on the same bucket are disallowed.

Enabled

<true|false>

An optional indication to verify if the rule is enabled. The absence of this attribute indicates the rule enabled.

NamePrefix

<prefix>

An optional prefix to match against the relative name of the object in question.

  • Always use quoted value and verify it is URL encoded

  • Never use slash as a first character for the prefix.

  • The rule is applied to the object if the prefix is matched with the object name.

  • The absence of the prefix indicates the rule is applied to all objects in the bucket.

ExpirationDays

<nonnegative integer>

The current version of an object is expired after the defined number of days.

ExpirationDate

<ISO 8601 date>

The current version of an object is expired after the defined date (midnight UTC time).

ObsoleteExpirationDays

<nonnegative integer>

A non-current version of an object is expired after the defined number of days when the object becomes non-current.

Info

Important

This rule takes effect if versioning is enabled on the bucket.

ObsoleteExpirationDate

<ISO 8601 date>

A non-current version of the object is expired after the defined date (midnight UTC time).

Info

Important

This rule takes effect if versioning is enabled on the bucket.

...

Note

Swarm supports the following ISO 8601 date formats:

  • 2024-01-01 T00:00:00.000Z

  • 2024-01-01 T00:00:00Z

  • 2024-01-01 T00:00:00

  • 2024-01-01

Rules with Attributes

Every rule:

  • Must have one or multiple expiration attributes.

  • ExpirationDays and ExpirationDate attributes are mutually exclusive.

  • ObsoleteExpirationDays and ObsoleteExprirationDate attributes are mutually exclusive.

Expiration Time Rule

  • For expiration days,
    Expiration time = Creation time of the current version + Number of days indicated + Rounded up to the next midnight UTC

  • For obsolete expiration days,
    Expiration time = Create time of the next newest object version + Number of days indicated + Rounded up to the next midnight UTC

  • ISO 8601 dates must unambiguously specify a calendar date. The (unspecified) expiration time is always midnight UTC of that date; any timezone specification is not allowed.

  • Expiration of a current version of an object (i.e. non-delete marker in the versioning enabled bucket) represents creating a delete marker, pushing the current version down the versioning stack.

  • In all other cases, the object or object version is permanently deleted.

...

Swarm Content Portal provides a convenient method of managing policies. This information is provided for completeness.

Info

Info

Since lifecycle policies are part of the overall context-level policy framework, GET and HEAD requests on contexts and name objects return Policy-Lifecycle-Evaluated and Policy-Lifecycle-Evaluated-Constrained headers. These headers describe if the lifecycle policies are enforced at the various levels such as cluster, domain, and bucket.