Unknown Log File /.service Using Up Disk Space in Root Filesystem

Applies to:

Oracle Cloud Infrastructure - Version N/A and later

Linux x86-64

Symptoms

It is observed that an unknown file is present in the root filesystem:

cd /
ls -alt .service
-rw-------. 1 root root 10858796857 Apr  8 10:22 .service
rpm -qf .service
file /.service is not owned by any package
The file contains regular system logs and is constantly updated and increasing in size.

The file is being accessed by the rsyslogd service:

$ lsof /.service
COMMAND     PID USER   FD   TYPE DEVICE    SIZE/OFF    NODE NAME

rsyslogd 356188 root   30w   REG  252,3 10788007613 6701566 /.service

Cause

As the file is being accessed by rsyslogd, the cause should be the logging configuration in rsyslog.