gce/BP/2021_001
Serial port logging is enabled.
Product: Compute Engine
Rule class: Best practices
Description
If this rule failed, it means that some instances have serial output logging disabled, and it is recommended that you enable it.
Serial port output can be often useful for troubleshooting, and enabling serial logging makes sure that you don’t lose the information when the VM is restarted. Additionally, serial port logs are timestamped, which is useful to determine when a particular serial output line was printed.
gcpdiag makes uses of the serial output logs to detect some common issues in GCE, which won’t work if serial output logging is disabled.
Remediation
See Viewing serial port output link below for instructions on how to enable serial output logging for GCE instances.