AWS Cost Reporter (Terraform + Python)

Daily FinOps automation that pulls AWS spend from Cost Explorer, generates PNG reports (matplotlib), stores artifacts in private S3, and emails time-limited pre-signed links via SNS — all deployed with Terraform.

Architecture

Overview

A daily FinOps-style automation that queries AWS Cost Explorer, generates JSON + PNG cost reports, stores them in private S3, and distributes access via SNS using time-limited pre-signed URLs.

Key Decisions

• Terraform-first deploy/destroy lifecycle
• Private-by-default artifacts shared via pre-signed URLs
• Lambda layer strategy for matplotlib/numpy

Results

• Automated daily report delivery
• Secure access model
• Clear upgrade path (SES HTML, PDF, alerts)