I'd like to have an init.d daemon restart my node.js app if it crashes. This script starts/stops my node app. I've had no luck getting it to restart the app if it crashes.
I'm running under CentOS. What am I missing?
#!/bin/sh
. /etc/rc.d/init.d/functions
USER="rmlxadmin"
DAEMON="/usr/bin/nodejs"
ROOT_DIR="/home/rmlxadmin"
SERVER="$ROOT_DIR/my_node_app.js"
LOG_FILE="$ROOT_DIR/app.js.log"
LOCK_FILE="/var/lock/subsys/node-server"
do_start()
{
if [ ! -f "$LOCK_FILE" ] ; then
echo -n $"Starting $SERVER: "
runuser -l "$USER" -c "$DAEMON $SERVER >> $LOG_FILE &" && echo_success || echo_failure
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch $LOCK_FILE
else
echo "$SERVER is locked."
RETVAL=1
fi
}
do_stop()
{
echo -n $"Stopping $SERVER: "
pid=`ps -aefw | grep "$DAEMON $SERVER" | grep -v " grep " | awk '{print $2}'`
kill -9 $pid > /dev/null 2>&1 && echo_success || echo_failure
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f $LOCK_FILE
}
case "$1" in
start)
do_start
;;
stop)
do_stop
;;
restart)
do_stop
do_start
;;
*)
echo "Usage: $0 {start|stop|restart}"
RETVAL=1
esac
exit $RETVAL
js Automatic restart Node. js server with nodemon. In this case, if we make any changes to the project then we will have to restart the server by killing it using CTRL+C and then typing the same command again.
If you need to restart your application while Nodemon is running manually. Instead of stopping and restarting your app, you can type rs and then enter. This action will do a quick reboot of your process. If at any point you would like to look at the available CLI options, then you can use -h.
You need to use additional tools like node-supervisor for this case.
Install node-supervisor with npm:
sudo npm install -g supervisor
Change DAEMON variable in your init.d script to node-supervisor executable: /usr/bin/supervisor. You can check this path using command 'whereis supervisor' in your system (after installation, of course).
Now supervisor will restart your application if it's crash.
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