[syslog-ng] syslog-ng logging only as foreground process and not as daemon on centos7

Scheidler, Balázs balazs.scheidler at balabit.com
Fri Feb 10 05:40:31 UTC 2017

Hmm, there might be an issue with socket activation, which only happens
when running under systemd.

Can you do an lsof on the syslog-ng process? Does it open a socket
somewhere in /run?

If you invoke logger with explicit -u option where you specify the name of
this socket, does it work?

On Feb 8, 2017 5:11 PM, "Jordan Ladora" <vicepresjoebiden at gmail.com> wrote:

> I've got syslog-ng v3.7.3_7 running on FreeBSD 11-REL as the log server
> with both FreeBSD 11-REL and CentOS7 clients (the CentOS clients are
> running v3.5.6-3.el7 as it's the latest version installed by yum epel
> repo).
> It's always worked perfectly on the FreeBSD systems, but a few months ago
> I had the same problem described here when setting up a CentOS client-
> https://serverfault.com/questions/760383/syslog-ng-
> working-as-foreground-process-but-not-as-daemon
> ...I followed the fix of uncommenting the "ForwardToSyslog=yes" line in /etc/systemd/journald.conf
> and it started logging perfectly on CentOS clients, too.
> However, in setting up another CentOS7 client yesterday, this fix no
> longer worked. If I start syslog-ng via-
> chkconfig syslog-ng on
> systemctl restart syslog-ng.service
> ..it starts and runs and is shown in ps, starts automatically after
> reboot, but doesn't log to the server. If I start it manually from the
> terminal with-
> nohup /usr/sbin/syslog-ng -F -p /var/run/syslogd.pid &
> ...then it does work and starts logging to the server immediately. In that
> case there are two identical (except for pid) lines shown by ps, e.g.-
> 482 /usr/sbin/syslog-ng -F -p /var/run/syslogd.pid
> 904 /usr/sbin/syslog-ng -F -p /var/run/syslogd.pid
> ...but only the one I started from the terminal (nohup...) actually logs.
> Any help would be much appreciated.
> -jl
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