A single Compute Engine instance runs your app and writes logs to disk. Users report errors and you need to diagnose the problem. What should you do?

The correct answer is to install and configure the Cloud Logging agent. The Cloud Logging agent (Ops Agent) is necessary to stream application logs from a Compute Engine instance to Cloud Logging. Once configured, you can then view and analyze these logs in Cloud Logging to diagnose the reported errors. Navigating directly to Cloud Logging without the agent installed will not show your application logs, as they are still only on the instance's disk. Connecting to the instance serial console is primarily for troubleshooting boot issues or interacting with the OS, not for efficiently viewing application logs, especially if the application is running. Configuring a health check monitors instance availability but doesn't provide insight into application-level errors or logs.