Configure lifecycle rules for S3 buckets using CDK

Lifecycle rules allow you to configure the lifecycle of objects in your S3 bucket. You can configure lifecycle rules to expire or transition objects to different storage classes.

Configure Lifecycle Rules

You can configure lifecycle rules on the S3 bucket by using the add_lifecycle_rule method of the Bucket construct.

# filename: cdk_app/s3_stack.py

from aws_cdk import (
    Stack,
    aws_s3 as s3,
    RemovalPolicy,
    Duration,  # 👈🏽 Import the Duration class
)

from constructs import Construct


class S3Stack(Stack):
    BUCKET_ID = "MyS3Bucket"

    def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
        super().__init__(scope, construct_id, **kwargs)

        my_bucket = s3.Bucket(
            self,
            id=self.BUCKET_ID,
            # 👇🏽 Set the lifecycle rules
            lifecycle_rules=[
                s3.LifecycleRule(
                    enabled=True,
                    expiration=Duration.days(14),
                )
            ],
            removal_policy=RemovalPolicy.DESTROY,
        )

In the above code, we have set the following lifecycle rules:

1. enabled=True - Enable the lifecycle rule
2. expiration=Duration.days(14) - Delete the objects after 14 days

You also configure transition rules by setting the transitions property of the LifecycleRule class.

# filename: cdk_app/s3_stack.py

from aws_cdk import (
    Stack,
    aws_s3 as s3,
    RemovalPolicy,
    Duration,  # 👈🏽 Import the Duration class
)

from constructs import Construct


class S3Stack(Stack):
    BUCKET_ID = "MyS3Bucket"

    def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
        super().__init__(scope, construct_id, **kwargs)

        my_bucket = s3.Bucket(
            self,
            self.BUCKET_ID,
            # 👇🏽 Set the lifecycle rules
            lifecycle_rules=[
                s3.LifecycleRule(
                    enabled=True,
                    transitions=[
                        s3.Transition(
                            storage_class=s3.StorageClass.INFREQUENT_ACCESS,
                            transition_after=Duration.days(30),
                        ),
                        s3.Transition(
                            storage_class=s3.StorageClass.GLACIER,
                            transition_after=Duration.days(60),
                        ),
                    ],
                )
            ],
            removal_policy=RemovalPolicy.DESTROY,
        )

In the above example, we have set the following transition rules:

1. storage_class=s3.StorageClass.INFREQUENT_ACCESS - Move the objects to infrequent access storage class after 30 days
2. storage_class=s3.StorageClass.GLACIER - Move the objects to Glacier storage class after 60 days