Cleanup Log-Files

[michaeljoos]

I’m a big fan of a clean system and that’s why I delete from time to time all the log files

openHAB creates the new log files only during the boot process. Does someone know if there is a process or command available (e.g. console) to force that without a reboot?

I also tried this:
> /var/log/openhab2/openhab.log

This command works to empty the file, but the system is in appending mode, remembers the line and creates a lot of empty lines (nulls) as soon as the next entry is written.

[Wolfgang_S]

@michaeljoos

I’m a big fan of a clean system and that’s why I delete from time to time all the log files

you should not do that manually - let the system do it for you. Have a look at the logrotate command.

man logrotate

See also: https://www.linode.com/docs/uptime/logs/use-logrotate-to-manage-log-files/

You can define when ( day, file size ) a log should be rotated ( this means a new file is to be created ) and how many files to keep to be able to analyze problems from the past.
Older files also will be compressed in case they should be kept.

[mstormi (Markus Storm)]

@Wolfgang_S

man logrotate

Don’t!
openhab has its builtin log management which will interfere with logrotate.

Read up on log4j2 and configure in /var/lib/openhab2/etc/org.ops4j.pax.logging.cfg.

[H102 (CM6.5 H102)]

As Markus mentioned above.

Here is a topic that may help.

openHAB - Filtering event logs

Simple string filtering on the event log. Useful for filtering out high change items that don’t need constant log visibility. Re-posting this as it’s own thread on the recommendation of other members. I also recommend reading Taming openHAB 2 Logging and Log4j2 Sample Config which this was based on. Log configuration data using openhabian-pi is stored in the following file. Location may vary under other installation methods. /srv/openhab2-userdata/etc/org.ops4j.pax.logging.cfg openHAB using …