You are deploying a web application hosted on Compute Engine. A business requirement mandates that application logs are preserved for 12 years and data is kept within European boundaries. You want…

While creating a Cloud Storage bucket in `europe-west1` is correct for data residency, modifying your application to directly upload logs is not the most cost-effective or low-overhead approach compared to using Cloud Logging's built-in log routing.

Google Cloud's operations suite (Cloud Logging) is the native, cost-effective solution for collecting and managing application logs from Compute Engine instances. It provides features to define log sinks to Cloud Storage buckets, allowing you to specify a European region (e.g., `europe-west1`) for data residency and configure a 12-year retention policy on the bucket itself using Object Lifecycle Management or by setting a bucket-level retention policy. This minimizes operational overhead compared to custom solutions.

Using Pub/Sub to forward logs to Cloud Storage adds unnecessary complexity and overhead compared to the integrated Cloud Logging solution for application logs.

While Cloud Logging supports custom retention, the 12-year retention period is typically managed on the *destination* storage (like Cloud Storage) rather than directly on the Cloud Logging service's default retention which is shorter. The most cost-effective long-term archival with custom retention is Cloud Storage.