On 11/29/2013 12:23 AM, Cecil Westerhof wrote:
In a trial presentation I used the following service file:
[Unit]
Description=Virtual Distributed Ethernet
After=syslog.target
[Service]
Type=forking
PIDFile=/var/run/vde.pid
# Note the -f: don't fail if there is no PID file
ExecStartPre=/bin/rm -f /var/run/vde.pid
ExecStart=/usr/bin/vde_switch --tap tap0 --mode 0660 \
--dirmode 0750 --group qemu \
--daemon --pidfile /var/run/vde.pid
Restart=on-abort
[Install]
WantedBy=multi-user.target
Here the PID file is removed before the service is started.
This brought up two questions.
- What happens is you start a service that you already started? Nothing,
or is the service first stopped and then again started?
- What happens if someone started the service manually? So bypassing
systemd and running directly /usr/bin/vde_switch.
I was not clear here. What I mend: someone starts the service manually
and after this starts the service with systemctl.
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