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

Robin Blanchard rblanchard at nephilaadvisors.com
Thu Feb 9 15:35:50 UTC 2017

I'd recommend running syslog-ng via:

# syslog-ng -dF

and see if the debug messages provide any clues.

FWIW - i run syslog-ng-3.7.3-3.el7.centos.x86_64 in production and syslog-ng-3.9.1-1.el7.centos.x86_64 in development, without issue...

From: syslog-ng [mailto:syslog-ng-bounces at lists.balabit.hu] On Behalf Of Jordan Ladora
Sent: Wednesday, 8 February, 2017 10:11
To: syslog-ng at lists.balabit.hu
Subject: [syslog-ng] syslog-ng logging only as foreground process and not as daemon on centos7

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-


...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.


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