how to run node js on dedicated server?

Question

I am doing a chat app and integrating it on a website. When i execute teh command \'node index.js\' on the local server everything works fine. But when i try installing node

Answer 1

You first need to install Node in a correct way. I wrote a tutorial about it: How to get Node 6.7.0 on Linux (of course you can use newer versions, just change the version in the commands).

Basically it's something like this - change the version to the one you like:

# change dir to your home:
cd ~
# download the source:
curl -O https://nodejs.org/dist/v6.1.0/node-v6.1.0.tar.gz
# extract the archive:
tar xzvf node-v6.1.0.tar.gz
# go into the extracted dir:
cd node-v6.1.0
# configure for installation:
./configure --prefix=/opt/node-v6.1.0
# build and test:
make && make test
# install:
sudo make install
# make a symlink to that version:
sudo ln -svf /opt/node-v6.1.0 /opt/node

I recommend building Node from source and always running make test but you can also install a binary package which is faster - just make sure you understand the issues with paths and hashbang lines if you do so - more info on that and more install options are described in my tutorial.

Then you need to make sure that your application is started every time the server is restarted. I recommend using Upstart if you can.

Using Upstart, save something like this in /etc/init/YOURAPP.conf:

# When to start the service
start on runlevel [2345]

# When to stop the service
stop on runlevel [06]

# If the process quits unexpectadly trigger a respawn
respawn

# Start the process
exec start-stop-daemon --start --chuid node --make-pidfile --pidfile /www/YOURAPP/run/node-upstart.pid --exec /opt/node/bin/node -- /www/YOURAPP/app/app.js >> /www/YOURAPP/log/node-upstart.log 2>&1

Just change:

• YOURAPP to the name of your own app
• /opt/node/bin/node to your path to node
• /www/YOURAPP/app/app.js to the path of your Node app
• /www/YOURAPP/run to where you want your PID file
• /www/YOURAPP/log to where you want your logs
• --chuid node to --chuid OTHERUSER if you want it to run as a different user than node

(make sure to add a user with a name from --chuid above)

With your /etc/init/YOURAPP.conf in place you can safely restart your server and have your app still running, you can run:

start YOURAPP
restart YOURAPP
stop YOURAPP

to start, restart and stop your app - which would also happen automatically during the system boot or shutdown.

For more info see those answers about:

• Installing Node
• Running Node on servers

You can also use systemd for that but there are some differences as the system is much more complicated and often leads to some problems.