[syslog-ng] systemd syslog-ng does not start CentOS 7.2.1511

[Scot Needy]

Hi, 

I need help setting up my control files for systemd I can’t figure out what I am doing wrong. If I make a SystemV start stop script it runs fine. 
From systemd I think there is something missing in the control files that lets syslog-ng report that is started successfully. 

When I add -F to SYSLOGNG_OPTS then systemctl start syslog-g.service never returns but syslog-ng does start. 

Compiled syslog-ng  syslog-ng 3.8.0alpha0 no problems. 
On the command line syslog-ng will start fine. 
 /opt/syslog-ng/sbin/syslog-ng -f  /opt/syslog-ng/etc/syslog-ng.conf -p  /var/run/syslogd.pid


Using  contrib/systemd/syslog-ng.service as an example I created /usr/lib/systemd/system/syslog-ng.service 

[Unit]
Description=System Logger Daemon
Documentation=man:syslog-ng(8)

[Service]
Type=notify
ExecStart=/opt/syslog-ng/sbin/syslog-ng $SYSLOGNG_OPTS
ExecReload=/bin/kill -HUP $MAINPID
EnvironmentFile=-/opt/syslog-ng/etc/syslog-ng.env
StandardOutput=journal
StandardError=journal
Restart=on-failure

[Install]
WantedBy=multi-user.target


cat  /opt/syslog-ng/etc/syslog-ng.env
LD_LIBRARY_PATH=/usr/java/jdk1.8.0_77/jre/lib/amd64/server:$LD_LIBRARY_PATH
SYSLOGNG_OPTS="-f /opt/syslog-ng/etc/syslog-ng.conf -p /var/run/syslogd.pid"


systemctl daemon-reload
systemctl restart systemd-journald
systemctl start    syslog-ng.service
systemctl status    syslog-ng.service
● syslog-ng.service - System Logger Daemon
   Loaded: loaded (/usr/lib/systemd/system/syslog-ng.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Tue 2016-04-12 14:51:04 EDT; 29s ago
     Docs: man:syslog-ng(8)
  Process: 2494 ExecStart=/opt/syslog-ng/sbin/syslog-ng $SYSLOGNG_OPTS (code=exited, status=0/SUCCESS)
 Main PID: 2494 (code=exited, status=0/SUCCESS)


Apr 12 14:41:08 loghost systemd[1]: Unit syslog-ng.service entered failed state.
Apr 12 14:41:08 loghost systemd[1]: syslog-ng.service failed.
Apr 12 14:41:08 loghost systemd[1]: syslog-ng.service holdoff time over, scheduling restart.
Apr 12 14:41:08 loghost systemd[1]: Starting System Logger Daemon...


I can see syslog-ng starting and stoping over and over from /var/log/messages 


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