gce/ERR/2021_001
Managed instance groups are not reporting scaleup failures.
Product: Compute Engine
Rule class: ERR - Something that is very likely to be wrong
Description
The managed instance group autoscaler will report via Cloud Logging any scale up failures, and the logs can help you determine why a scale up didn’t succeed.
Remediation
You can use the following Cloud Logging query to find matching log entries:
resource.type="gce_instance"
log_id(cloudaudit.googleapis.com/activity)
severity=ERROR
protoPayload.methodName="v1.compute.instances.insert"
protoPayload.requestMetadata.callerSuppliedUserAgent="GCE Managed Instance Group"