RHEL6 SysV to RHEL7 systemd script for LibreOffice headless server

I had to adjust a script from an “old” RHEL6 SysV script to a “new” RHEL7 systemd script. I can do the systemd script for LibreOffice no problem, but when I try to had Xvfb (mandatory for users with a GUI to connect to the LibreOffice server and use it) it stopped working and gives me headaches. I tried to launch it independantly (first Xvfb in a .service then libreoffice) but still no chance … The only way I made it work is by launching Xvfb at the command line then launching the systemd script for LibreOffice server. I’ll show you my scripts :

Old SysV script :

#!/bin/bash
# openoffice.org headless server script
#
# chkconfig: 2345 80 30
# description: headless openoffice server script
# processname: openoffice
#
# Author: Vic Vijayakumar
# Modified by Federico Ch. Tomasczik
OOo_HOME=/opt/libreoffice5.0/program
SOFFICE_PATH=$OOo_HOME/soffice
PIDFILE=/var/run/openoffice-server.pid

set -e

case "$1" in
start)
if [ -f $PIDFILE ]; then
echo "OpenOffice headless server has already started."
sleep 5
exit
fi
echo "Starting OpenOffice headless server"
Xvfb :1 -screen 0 1024x768x24 & > /dev/null 2>&1
$SOFFICE_PATH --nolockcheck --norestore --nodefault --nologo --nofirststartwizard --accept="socket,host=localhost,port=8085,tcpNoDelay=1;urp" --display :1 & > /dev/null 2>&1
touch $PIDFILE
;;
stop)
if [ -f $PIDFILE ]; then
echo "Stopping OpenOffice headless server."
killall -9 oosplash && killall -9 soffice.bin && killall -9 Xvfb
rm -f $PIDFILE
exit
fi
killall -9 Xvfb
echo "Openoffice headless server is not running."
exit
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
exit 0

New Systemd Script :

[Unit]
Description=Headless LibreOffice server script
Documentation=https://fr.libreoffice.org/
DefaultDependencies=no

[Service]
ExecStartPre=Xvfb :1 -screen 0 1024x768x24 -nolisten inet6 & > /dev/null 2>&1
ExecStart=/usr/lib64/libreoffice/program/soffice --headless --nolockcheck --norestore --nodefault '--accept=socket,host=localhost,port=8101,tcpNoDelay=1;urp;' --nofirststartwizard --nologo
Type=oneshot
TimeoutStopSec=5
PIDFile=/var/run/libreoffice-server.pid

[Install]

WantedBy=multi-user.target

Then I found that the redirection (&) are not functionning really well in a systemd script so I made a bash script and called it from the systemd script like this :

...
[Service]
ExecStartPre=/bin/bash /usr/bin/Xvfb_launch.sh
...

And there is Xvfb_launch.sh :

#!/bin/bash

/usr/bin/Xvfb :1 -screen 0 1024x768x24 -nolisten inet6 & > /dev/null 2>&1

But still not working, the script stays forever on “Activating” and no process are launched.

Any ideas ?

Thank you for your help !

Have a great day !!

Rick