Bug ID 663580: logrotate does not automatically run when /var/log reaches 90% usage

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
12.1.0, 12.1.1, 12.1.2, 12.1.3, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:

Opened: May 08, 2017

Severity: 3-Major

Related Article: K31981624


The alertd daemon does not run logrotate when the diskmonitor utility detects that /var/log has less than 10% free space.


The /var/log filesystem might become completely full, preventing new log messages from being written. Note: K8865: Overview of the diskmonitor utility (https://support.f5.com/csp/article/K8865) provides a desription for expected behavior.


/var/log has less than 10% free space.



Fix Information

The alertd daemon now correctly recognizes the log message from diskmonitor to initiate logrotate.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips