Managing Access to AI Training Datasets in S3 Buckets

Question

Pulumi · Accepted Answer

To manage access to AI training datasets in S3 buckets, you will need to set up a secure AWS S3 bucket and configure its access permissions appropriately. In this context, datasets are generally stored as files or objects within an S3 bucket.

The program below creates an S3 bucket for storing AI training datasets and applies policies to restrict and control access to the datasets stored within it. We are going to use several Pulumi AWS resources to do this:

1. `aws.s3.Bucket`: This resource is used to create a new S3 bucket that will store your AI training datasets.
2. `aws.s3.BucketPolicy`: This resource attaches a policy to the bucket. You can specify the policy as a JSON document in which you define who has what permissions to the objects in the bucket.
3. `aws.s3.BucketPublicAccessBlock`: This resource is used to set additional restrictions to enforce the privacy of your S3 bucket by blocking public access.

We'll go over every step and explain what each line of code does within the Pulumi program.

```python
import json
import pulumi
import pulumi_aws as aws

# Create a new S3 bucket to store your AI training datasets.
ai_datasets_bucket = aws.s3.Bucket("aiDatasetsBucket",
    acl="private",  # This defines the bucket to be private.
    versioning=aws.s3.BucketVersioningArgs(
        enabled=True  # This enables versioning to keep a history of your datasets and avoid accidental data loss.
    )
)

# Define an S3 bucket policy document that specifies access control.
# In this hypothetical policy, only users from a specific AWS account can access this bucket.
# You can customize the policy as per your access requirements.
bucket_read_policy_document = aws.iam.get_policy_document(statements=[
    aws.iam.GetPolicyDocumentStatementArgs(
        principals=[aws.iam.GetPolicyDocumentStatementPrincipalArgs(
            type="AWS",
            identifiers=["arn:aws:iam::123456789012:root"]  # Specify the AWS account ARN that can access the bucket.
        )],
        actions=["s3:GetObject"],  # Allow these principals to only read the objects in the bucket.
        resources=[ai_datasets_bucket.arn.apply(lambda arn: f"{arn}/*")]
        # Use .apply method to concatenate the bucket ARN with the wildcard to refer to all objects in the bucket.
    )
])

# Attach the policy to the previously created S3 bucket.
bucket_policy = aws.s3.BucketPolicy("bucketPolicy",
    bucket=ai_datasets_bucket.id,  # Reference the bucket's ID.
    policy=bucket_read_policy_document.json  # Set the policy document defined above.
)

# Optionally, block all public access to this S3 bucket to ensure that your datasets remain private.
public_access_block = aws.s3.BucketPublicAccessBlock("publicAccessBlock",
    bucket=ai_datasets_bucket.id,
    block_public_acls=True,
    block_public_policy=True,
    ignore_public_acls=True,
    restrict_public_buckets=True
)

# Export the S3 bucket name so that you can easily identify it.
pulumi.export("ai_datasets_bucket_name", ai_datasets_bucket.id)
```

Here's how the program works:

- We start by importing the necessary modules. `json` for working with JSON (which we'll use for the policy document), `pulumi` for base Pulumi functionality, and `pulumi_aws` that contains the AWS resource types we will work with.
- The `aws.s3.Bucket` resource creation block sets up an S3 bucket with the provided name, and ensures the bucket is private by specifying the Access Control List (ACL) as 'private'.
- Versioning is enabled on the bucket to keep track of and easily roll back to earlier versions of your datasets if needed.
- The `aws.iam.get_policy_document` call generates an IAM policy document that is designed to grant read access (`s3:GetObject`) to the contents of the bucket. It's restricted to a specified AWS account by its ARN. The policy leverages the `.apply` method to properly reference all objects within the bucket.
- The `aws.s3.BucketPolicy` resource then attaches that policy to your S3 bucket. It turns the policy document into JSON format and sets it as the policy for the bucket.
- Additional safety is provided by `aws.s3.BucketPublicAccessBlock` which blocks all public access to the bucket, ensuring that the data cannot be accessed by unauthorized users or through the Internet.
- Finally, `pulumi.export` is used to output the bucket name so it can be easily retrieved from the Pulumi stack after deployment.

By running this program with Pulumi, you create an S3 bucket configured for secure access that can be used to store and manage AI training datasets. Adjust the `bucket_read_policy_document`'s principles and actions according to your exact access requirements.