i2pd.service: control/unit file, systemd service definition

i2pd.service

[Unit]
Description=I2P Router written in C++
Documentation=man:i2pd(1) https://i2pd.readthedocs.io/en/latest/
After=network.target
ConditionFileIsExecutable=/usr/sbin/i2pd

[Service]
User=i2pd
Group=i2pd
RuntimeDirectory=i2pd
RuntimeDirectoryMode=0700
LogsDirectory=i2pd
LogsDirectoryMode=0700
Type=forking
Environment="DAEMON_OPTS=--conf=/etc/i2pd/i2pd.conf --tunconf=/etc/i2pd/tunnels.conf --tunnelsdir=/etc/i2pd/tunnels.conf.d --pidfile=/run/i2pd/i2pd.pid --logfile=/var/log/i2pd/i2pd.log --daemon --service"
EnvironmentFile=-/etc/default/i2pd
ExecStart=/usr/sbin/i2pd $DAEMON_OPTS
ExecReload=/bin/sh -c "kill -HUP $MAINPID"
PIDFile=/run/i2pd/i2pd.pid
### Uncomment, if auto restart needed
#Restart=on-failure

KillSignal=SIGQUIT
# If you have the patience waiting 10 min on restarting/stopping it, uncomment this.
# i2pd stops accepting new tunnels and waits ~10 min while old ones do not die.
#KillSignal=SIGINT
#TimeoutStopSec=10m

# If you have problems with hanging i2pd, you can try increase this
LimitNOFILE=4096
# To enable write of coredump uncomment this
#LimitCORE=infinity

[Install]
WantedBy=multi-user.target