# LifecycleRules

Lifecycle rules to automatically transition objects to different storage classes or permanently delete (expire) them.

- **Transitions**: Automatically move objects to a cheaper storage class after a specified time or on a specific date. Use this for data that is accessed less frequently over time (e.g., logs, backups, archives).
- **Expiration**: Automatically and permanently delete objects after a specified time or on a specific date. Use this for temporary data, logs with retention policies, or any data that should be cleaned up automatically.

## Example: Archive old logs and delete after 1 year

```json
{
  "rules": [
    {
      "id": "archive-and-cleanup-logs",
      "enabled": true,
      "transitions": [
        { "days": 90, "storage_class": "GLACIER" }
      ],
      "expiration": { "days": 365 }
    }
  ]
}
```

This rule transitions objects to `GLACIER` after 90 days, and permanently deletes them after 365 days.

## Update Behavior (Partial Updates Supported)

- **Omit field entirely**: Keeps existing lifecycle rules unchanged
- **Include empty rules array `[]`**: Removes all lifecycle rules
- **Include rules**: Replaces all lifecycle rules with the provided set

Note: When updating rules, you must provide the complete rule configuration. To preserve existing rules while making changes, first retrieve the current bucket configuration, modify the desired fields, and submit the complete updated rules.

**rules**object[]

Array [

**id** stringrequired

Unique identifier for the rule (max 255 chars). Use a descriptive name like `archive-old-logs` or `expire-temp-uploads`.

**Possible values:**`<= 255 characters`

**enabled** booleanrequired

Whether the rule is currently active. Set to `false` to temporarily disable a rule without deleting it. When disabled, objects will not be transitioned or expired by this rule.

**expiration**object

Configuration for automatic object deletion (expiration).

When the expiration condition is met, objects matching this rule are **permanently deleted**.

## Specify ONE Condition (Not Both)

- `days`: Delete objects N days after their creation date
- `date`: Delete all matching objects on a specific date

**days** integer

Number of days after object creation when the object will be deleted.
The deletion happens at midnight UTC on the calculated expiration date.

Example: If `days: 30` and an object was created on Dec 1, it expires on Dec 31.

**date** date-time

Specific date (at midnight UTC) when all matching objects will be deleted, regardless of when they were created.
Use this for one-time cleanup operations or compliance deadlines.

Must be a future date in RFC3339 format with midnight UTC time.

**Example:** `2025-01-01T00:00:00Z`

**transitions**object[]

List of storage class transitions. Objects will transition through each defined step. Transitions must be in chronological order (earlier days/dates first).

Array [

**days** integer

Number of days after object creation when the transition occurs.
The transition happens at midnight UTC on the calculated date.

Example: If `days: 60` and an object was created on Jan 1, it transitions on Mar 2.

**date** date-time

Specific date (at midnight UTC) when all matching objects will be transitioned, regardless of when they were created.
Use this for planned migrations or cost optimization deadlines.

Must be a future date in RFC3339 format with midnight UTC time.

**Example:** `2025-06-01T00:00:00Z`

**storage_class** StorageClassrequired

Storage class for the bucket. Default is `STANDARD`.

**Possible values:** [`STANDARD`, `STANDARD_IA`, `GLACIER`, `GLACIER_IR`]

]

**filter**object

Optional scope for a lifecycle rule. When unset, the rule applies to every object in the bucket.

**prefix** string

Only apply this rule to objects whose keys start with the given prefix.
For example, `logs/` scopes the rule to objects under that prefix.

**LifecycleRules**

```json
{
  "rules": [
    {
      "id": "string",
      "enabled": true,
      "expiration": {
        "days": 0,
        "date": "2025-01-01T00:00:00Z"
      },
      "transitions": [
        {
          "days": 0,
          "date": "2025-06-01T00:00:00Z",
          "storage_class": "STANDARD"
        }
      ],
      "filter": {
        "prefix": "string"
      }
    }
  ]
}
```