How To Deploy Node.js Application with PM2 on Ubuntu 16.04

PM2 is an advanced, production process manager for Node.js applications. In this tutorial you will learn how to deploy your Node.js applications on production server using pm2 tool. PM2 helps you monitor applications, their memory and cpu uses. Also provide easy commands to stop/start/restart all apps or individual apps.

Step 1: Install Node.js

First you need to node.js ppa in our system provide by nodejs official website. We also need to install python-software-properties package if not installed already.

$ sudo apt-get install python-software-properties $ curl -sL https://deb.nodesource.com/setup_7.x | sudo -E bash - 

After adding required PPA file, lets install Nodejs package. NPM will also be installed with node.js. This command will also install many other dependent packages on your system.

$ sudo apt-get install nodejs 

Step 2: Install PM2

Now use npm to install process manager for Node.js using following command. This will install latest version of pm2 on your system.

$ sudo npm install pm2@latest -g 

Step 3: Start Application with PM2

Now create PM2 configuration file. For this tutorial I have two Node.js applications to host on production server. The source code applications are available under /var/www/parse-apps/app1 and /var/www/parse-apps/app2 directories. Create a configuration file parse-apps.config.js with following content. My both applications have index.js startup JavaScript file to run my application.

module.exports = {   apps : [{     name        : "My App 1",     script      : "index.js",     watch       : true,     merge_logs  : true,     cwd         : "/var/www/parse-apps/app1/",    },{     name        : "My App 1",     script      : "index.js",     watch       : true,     merge_logs  : true,     cwd         : "/var/www/parse-apps/app2/",   }] } 

Now use following command to start application with pm2. In below command we are passing parse-apps.config.js configuration file name. PM2 will read configuration file and start all applications and assign a uniq id.

$ pm2 start parse-apps.config.js 

Step 4: Manage Processes with PM2

To list all processes registered under PM2 using following command. This will also display status of application, process id and other useful information.

$ sudo pm2 list 

To view more details of specific process, you can use below command followed by id or process app name.

$ sudo pm2 show 1 

You can also monitor all processes cpu and memory uses in real-time.

$ sudo pm2 monit 

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