[Unit]
Description=Kamailio (OpenSER) - the Open Source SIP Server
After=network.target

[Service]
Type=forking
Environment='CFGFILE=/etc/kamailio/kamailio.cfg'
Environment='SHM_MEMORY=64'
Environment='PKG_MEMORY=8'
Environment='USER=kamailio'
Environment='GROUP=kamailio'
EnvironmentFile=-/etc/default/kamailio
EnvironmentFile=-/etc/default/kamailio.d/*
# PIDFile requires a full absolute path
PIDFile=/var/run/kamailio/kamailio.pid
# ExecStart requires a full absolute path
ExecStart=/usr/sbin/kamailio -P /var/run/kamailio/kamailio.pid -f $CFGFILE -m $SHM_MEMORY -M $PKG_MEMORY -u $USER -g $GROUP
Restart=on-abort

[Install]
WantedBy=multi-user.target