storage-report

Type: Lambda function
Trigger: Scheduled EventBridge event (weekly)
Dependencies: inventory-report

Overview

This Lambda function generates a consolidated storage report for a stack, displaying storage usage across all standard and public buckets. The report is output as a single interactive HTML file using Chart.js for visualizations.

Report sections

• Aggregated totals — Storage usage across all buckets in the stack
• Per bucket totals — Storage usage broken down by individual bucket
• Per bucket / per prefix totals — Storage usage by prefix within each bucket

Prerequisites

The storage report requires S3 inventory data to be available. Before running this function:

1. S3 inventory must be enabled for the buckets
2. At least one inventory report must have been generated and uploaded
3. The inventory-report function must have completed successfully

CLI testing

Generate a storage report for a specific stack:

make run-storage-report s=digipres-dev1 p=default

Parameters:

• s= — Stack name (required)
• p= — AWS profile (required)

Remote trigger

make trigger f=storage-report s=digipres-dev1 p=default

Parameters:

• f= — Function name (storage-report)
• s= — Stack name (required)
• p= — AWS profile (required)

Scheduled execution

Automatically triggered weekly by EventBridge.

Output

When successful, four files are generated:

Statistics (JSON format)

• metadata/latest/storage/stats/{stack}.json — Latest version
• metadata/YYYY-MM-DD/storage/stats/{stack}.json — Date-stamped archive

Contains raw storage metrics for programmatic access.

Report (HTML format)

• reports/latest/storage/{stack}.html — Latest version
• reports/YYYY-MM-DD/storage/{stack}.html — Date-stamped archive

Interactive HTML report with Chart.js visualizations for viewing in a browser.