Add systemd unit file for the python poller service.

Move poller-service init scripts into to scripts directory and update the documentation.

scripts/librenms-poller-service.conf

@@ -0,0 +1,26 @@
+# poller-service - SNMP polling service for LibreNMS
+
+description "SNMP polling service for LibreNMS"
+author "Clint Armstrong <clint@clintarmstrong.net>"
+
+# When to start the service
+start on runlevel [2345]
+
+# When to stop the service
+stop on runlevel [016]
+
+# Automatically restart process if crashed
+respawn
+
+# Restart an unlimited amount of times
+respawn limit unlimited
+
+chdir /opt/librenms
+setuid librenms
+setgid librenms
+
+# Start the process
+exec /opt/librenms/poller-service.py
+
+# Wait 60 seconds before restart
+post-stop exec sleep 60

scripts/librenms-poller-service.init

@@ -0,0 +1,79 @@
+### BEGIN INIT INFO
+# Provides:          librenms-poller-service
+# Required-Start:    networking
+# Required-Stop:     networking
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: The LibreNMS poller-service daemon
+# Description:       The LibreNMS poller-service daemon
+#                    This polls devices monitored by LibreNMS
+### END INIT INFO
+
+. /lib/lsb/init-functions
+
+NAME=librenms-poller-service
+
+DAEMON=/opt/librenms/poller-service.py
+
+USER=librenms
+
+PIDFILE=/var/run/librenms-poller-service.pid
+
+test -x $DAEMON || exit 5
+
+case $1 in
+
+ start)
+  # Checked the PID file exists and check the actual status of process
+  if [ -e $PIDFILE ]; then
+   status_of_proc -p $PIDFILE $DAEMON "$NAME process" && status="0" || status="$?"
+   # If the status is SUCCESS then don't need to start again.
+   if [ $status = "0" ]; then
+    exit # Exit
+   fi
+  fi
+  # Start the daemon.
+  log_daemon_msg "Starting the process" "$NAME"
+  # Start the daemon with the help of start-stop-daemon
+  # Log the message appropriately
+  if start-stop-daemon --start --quiet --oknodo --make-pidfile --pidfile $PIDFILE --exec $DAEMON --chuid $USER --background; then
+   log_end_msg 0
+  else
+   log_end_msg 1
+  fi
+  ;;
+
+ stop)
+  # Stop the daemon.
+  if [ -e $PIDFILE ]; then
+   status_of_proc -p $PIDFILE $DAEMON "Stoppping the $NAME process" && status="0" || status="$?"
+   if [ "$status" = 0 ]; then
+    start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
+    /bin/rm -rf $PIDFILE
+   fi
+  else
+   log_daemon_msg "$NAME process is not running"
+   log_end_msg 0
+  fi
+  ;;
+ restart)
+  # Restart the daemon.
+  $0 stop && sleep 2 && $0 start
+  ;;
+
+ status)
+  # Check the status of the process.
+  if [ -e $PIDFILE ]; then
+   status_of_proc -p $PIDFILE $DAEMON "$NAME process" && exit 0 || exit $?
+  else
+   log_daemon_msg "$NAME Process is not running"
+   log_end_msg 0
+  fi
+  ;;
+
+ *)
+  # For invalid arguments, print the usage message.
+  echo "Usage: $0 {start|stop|restart|reload|status}"
+  exit 2
+  ;;
+esac

scripts/librenms-poller-service.service

@@ -0,0 +1,14 @@
+[Unit] 
+Description=LibreNMS SNMP Poller Service
+After=network.target 
+
+[Service] 
+ExecStart=/opt/librenms/poller-service.py
+WorkingDirectory=/opt/librenms
+User=librenms
+Group=librenms
+RestartSec=2
+Restart=always
+
+[Install]
+WantedBy=multi-user.target