Configure Aggregated Log Sinks Central Logging Cost Optimization

What Aggregated Log Sinks and Exclusion Filters Are

An aggregated log sink routes log entries from an organization, folder, or billing account (and all their child resources) to a centralized destination such as a dedicated Google Cloud project, Cloud Storage bucket, BigQuery dataset, or Pub/Sub topic. Exclusion filters specify which log entries to omit from ingestion into a sink's destination, preventing unwanted log volume and controlling costs.

How It Meets the Requirements

• Hierarchy-Wide Centralization: Configuring the sink at the organization or folder level allows it to automatically capture logs from all current and future child projects and route them to the central security project (logging.googleapis.com/projects/DESTINATION_PROJECT_ID).
• Audit Log Retention: Inclusion filters can target critical Cloud Audit Logs (cloudaudit.googleapis.com), ensuring security compliance.
• Cost Optimization: Configuring exclusion filters using the sample function allows you to ingest only a percentage (e.g., 50%) of high-volume logs like VPC Flow Logs while filtering out non-critical debug or development entries.

Key Advantages

• Single Control Point: Eliminates the operational overhead of managing individual sinks across hundreds of projects.
• Granular Cost Control: Combining inclusion filters, exclusion filters, and sampling minimizes Cloud Logging ingestion and storage charges.
• Continuous Ingestion: Child projects are inherited dynamically as the organization structure changes.

Why This Is Optimal

Aggregated sinks at the resource hierarchy parent node (organization or folder) provide unified governance and security oversight while leveraging native exclusion and sampling features to reduce data volume before incurring unnecessary destination charges.