[sheepdog-users] logrotate

[Hitoshi Mitake]

At Tue, 14 Oct 2014 14:47:39 +0200,
Valerio Pachera wrote:
> 
> 2014-10-14 8:42 GMT+02:00 Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>:
> > Can I close the issue:
> > https://bugs.launchpad.net/sheepdog-project/+bug/1371434
> > ?
> 
> Yes, It's invalid.
> 
> I've been looking at sheepdog sources but I can't find where
> 'rotate_log()' is declared.
> What we need is simply to close and re-open the log file.
> 
> What do you think about:
> 
> 1) Find out if the function 'rotate_log()' may overlap with linux 'logrotate'.
> 2) Create a /var/run/sheep.pid. Distributions' init scripts can simply
> send -HUP to the right pid (remember we have 2).
> 3) Debian and other distros create their own init script and logrotate
> config file.

If configuring log rotation with SIGHUP is not difficult, I think no
enhancement is required. But the configuration requires the knowledge,
could you add a description to our wiki and documentation?

Thanks,
Hitoshi

> 
> 
> *) Debian specific:
> 
> > Currently I don't know why other daemon processes on debian can adopt
> > debian's logrotate (for me, there's no event for detecting rename of
> > logfile). It should be solved in the future. But let's use the
> > workaround for now.
> 
> It's not a sheepdog related issue, it was more my mistake.
> In my first configuration I was not sending any -HUP singnal.
> Looking at already existing configurations, I see that each time a
> daemon is involved, -HUP is sent to rotate the log.
> 
> this is the chain I see:
>   logrotate -> init script -> start_stop_daemon -> HUP
> 
> Here's how rsyslog file get rotated.
> 
> /var/log/syslog
> {
>         rotate 7
>         daily
>         missingok
>         notifempty
>         delaycompress
>         compress
>         postrotate
>                 invoke-rc.d rsyslog rotate > /dev/null
>         endscript
> }
> 
> less /etc/init.d/rsyslog
> 
> do_rotate() {
>         DAEMON="$RSYSLOGD_BIN"
>         PIDFILE="$RSYSLOGD_PIDFILE"
> 
>         start-stop-daemon --stop --signal HUP --quiet --pidfile
> $PIDFILE --exec $DAEMON
> }
> 
> This is another example about samba
> 
> /var/log/samba/log.nmbd {
>         weekly
>         missingok
>         rotate 7
>         postrotate
>                 [ ! -f /var/run/samba/nmbd.pid ] || kill -HUP `cat
> /var/run/samba/nmbd.pid`
>         endscript
>         compress
>         notifempty
> }
> 
> /var/log/samba/log.smbd {
>         weekly
>         missingok
>         rotate 7
>         postrotate
>                 /etc/init.d/samba reload > /dev/null
>         endscript
>         compress
>         notifempty
> }
> 
> less /etc/init.d/samba
>         reload)
>                 if [ "$RUN_MODE" != "inetd" ]; then
>                         log_daemon_msg "Reloading /etc/samba/smb.conf"
> "smbd only"
> 
>                         start-stop-daemon --stop --quiet --signal HUP
> --pidfile $SMBDPID
> 
>                         log_end_msg 0
>                 fi
>                 ;;
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