Add server-side encryption

Server-side encryption (SSE) in Amazon S3 automatically encrypts data when it is written to the storage service and decrypts it when accessed, providing robust data protection, compliance with regulatory requirements, and ease of management.

What we'll be doing

1. Review the existing module
2. Configure server-side encryption (SSE)

Review the existing module

Start by cloning the Nitric repository, then examine how the Terrraform provider provisions an S3 bucket.

git clone https://github.com/nitrictech/nitric
cd nitric

The AWS S3 module in the default Terraform provider performs the following tasks:

1. Creates a unique ID for the S3 bucket to ensure unique naming.
2. Provisions an S3 bucket with a unique name using the generated ID.
3. Tags the bucket for identification.
4. Grants S3 permission to invoke specified Lambda functions.
5. Configures S3 bucket notifications to trigger Lambda functions based on specified events using dynamic blocks.

To begin our customization, we will start adding configuration to this module.

Add server-side encryption (SSE)

Add the following at the end of aws/deploytf/.nitric/modules/bucket/main.tf:

# AWS S3 bucket server-side encryption configuration
resource "aws_s3_bucket_server_side_encryption_configuration" "bucket_encryption" {
  bucket = aws_s3_bucket.bucket.bucket

  rule {
    apply_server_side_encryption_by_default {
      sse_algorithm = "AES256"
    }
  }
}

Build and use your modified provider

The Nitric project includes a make file that will build and install your provider as nitric/awstf@0.0.1 by default.

Navigate to nitric/cloud/aws and run make install to build and install the modified provider binary.

cd nitric/cloud/aws

make install

The provider can then be used directly in your project's stack file as follows.

# The nitric provider to use
provider: nitric/awstf@0.0.1

# The target aws region to deploy to
region: us-east-2

Because the Terraform providers are in preview, you'll also need to enable beta-providers in your Nitric project by adding the following to your project's nitric.yaml file:

preview:
  - beta-providers

You can generate the Terraform project as usual by running the nitric up command:

nitric up

To deploy the application using Terraform, you can navigate into your Terraform stack directory and use the standard Terraform commands:

terraform init
terraform plan
terraform apply

Finally, log into the AWS console to verify the encryption configuration was applied.