Daemon init script for a Node.js app using PM2 that runs under a different user

nodejs-init-script

#!/bin/bash
 
NAME=myApp
APP=/path/to/app/index.js
PARAMS="--foo bar"
PM2=/usr/local/bin/pm2
USER=nobody
INSTANCES=max
LOGFILE=/tmp/.pm2/.log
ERRORFILE=/tmp/.pm2/.error
PIDFILE=/tmp/.pm2/.pid
 
export PATH=$PATH:/usr/bin
 
super() {
    su - $USER -c "PATH=$PATH; $*"
}
 
start() {
    echo "Starting $NAME"
    super $PM2 start $APP -n $NAME -i $INSTANCES -o $LOGFILE -e $ERRORFILE -p $PIDFILE -- -a $PARAMS
}
 
stop() {
    super $PM2 delete $NAME
}
 
restart() {
    echo "Restarting $NAME"
    stop
    start
}
 
reload() {
    echo "Reloading $NAME"
    super $PM2 reload $NAME
}
 
status() {
    echo "Status for $NAME:"
    super $PM2 list
    RETVAL=$?
}
 
kill() {
    echo "Killing $NAME"
    super $PM2 kill
}
 
case "$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    status)
        status
        ;;
    restart)
        restart
        ;;
    reload)
        reload
        ;;
    force-reload)
        reload
        ;;
    kill)
        kill
        ;;
    *)
        echo "Usage: {start|stop|status|restart|reload|force-reload|kill}"
        exit 1
        ;;
esac
exit $RETVAL