Kubernetes: Set Unlimited Audit Log MaxSize When 0 is Specified

Problem

When MaxSize was set to 0 for audit logs, the system treated it as a small size instead of unlimited. Users expecting unlimited log size couldn't configure it.

Solution

Updated audit log handling to interpret MaxSize=0 as effectively unlimited. Updated test expectations to expect os.File when MaxSize is 0.

Result

MaxSize=0 now correctly produces unlimited audit logs. Users can configure unlimited size explicitly.

Commit: kubernetes/kubernetes@b753a2a