[mythtv-users] mythbackend.log is buffered?

[Jerome Yuzyk]

On Monday, October 26, 2015 10:17:13 AM Eric Sharkey wrote:
> On Mon, Oct 26, 2015 at 10:12 AM, Simon Hobson <linux at thehobsons.co.uk> wrote:
> > Karl Newman <newmank1 at asme.org> wrote:
> >
> >> So probably the solution would be to add a `killall -HUP mythbackend` (or mythlogserver?) lastaction command to the logrotate config.
> >
> > That sounds a bit drastic, but somehow you have to get the program to start writing to a different log file.
> 
> The HUP signal is the standard way to do that.  The deb multimedia
> packages have:
> 
> mythtered% cat /etc/logrotate.d/mythlogserver
> /var/log/mythtv/*.log {
>         daily
>         rotate 7
>         notifempty
>         delaycompress
>         sharedscripts
>         compress
>         postrotate
>                 if [ -z "pidof mythlogserver" ]; then
>                         pkill -HUP mythlogserver
>                 fi
>         endscript
>         su mythtv mythtv
> }
> 
> Eric

This is what I've been given for Myth from the RPMFusion packages. I think the 'nocreate' option is what is not creating a new log file, unlike every other logfile on any of my Fedora systems. Not sure why it's there, except maybe it's expected that the restarting mythbackend will create it. Is that the logic? Is there a reason I shouldn't remove that option?

[mythtv at tv bin]$ sudo cat /etc/logrotate.d/mythtv 
#
# logrotate doesn't support pattern precedence, so they have to be explicit
#
# logs that should be deleted every day
/var/log/mythtv/mythcommflag.*.*.log
/var/log/mythtv/mythpreviewgen.*.*.log
/var/log/mythtv/mythtranscode.*.*.log
{
    daily
    rotate 0
    nocreate
    missingok
    ifempty
}

# all other non-backend logs are kept for a week
/var/log/mythtv/mythfilldatabase*.*.*.log
/var/log/mythtv/mythmetadatalookup*.*.*.log
{
    weekly
    rotate 0
    nocreate
    missingok
    ifempty
}

# backend log: keep for 4 weeks & compress
/var/log/mythtv/mythbackend.*.*.log {
    weekly
    rotate 4
    nocreate
    missingok
    ifempty
    compress
    compresscmd /usr/bin/bzip2
    uncompresscmd /usr/bin/bunzip2
    compressext .bz2
    firstaction
        /bin/systemctl kill mythbackend.service --signal=HUP --kill-who=main 2>/dev/null || true
    endscript
    # general cleanup after 4 weeks of anything we might have missed
    lastaction
        find /var/log/mythtv -type f -mtime +28 -delete
    endscript
}


-- 
A little of Jerome's MythTV World: http://mythtv.bss.ab.ca