Node.js Process Manager (pm2)

Installation

npm

 npm install pm2@latest -g

Yarn

 yarn global add pm2

To install Node.js and NPM you can use NVM

Start an app

The simplest way to start, daemonize and monitor your application is by using this command line:

 pm2 start app.js

Or start any other application easily

 pm2 start bashscript.sh

pm2 start python-app.py --watch

pm2 start binary-file -- --port 1520

Some options you can pass to the CLI:

# Specify an app name
--name <app_name>

# Watch and Restart app when files change
--watch

# Set memory threshold for app reload
--max-memory-restart <200MB>

# Specify log file
--log <log_path>

# Pass extra arguments to the script
-- arg1 arg2 arg3

# Delay between automatic restarts
--restart-delay <delay in ms>

# Prefix logs with time
--time

# Do not auto restart app
--no-autorestart

# Specify cron for forced restart
--cron <cron_pattern>

# Attach to application log
--no-daemon

Managing processes

Managing application state is simple here are the commands:

restart

 pm2 restart app_name

reload

pm2 reload app_name

stop

pm2 stop app_name

delete

pm2 delete app_name

Instead of app_name you can pass:

• all to act on all processes
• id to act on a specific process id

Check status, logs, metrics

Now that you have started this application, you can check its status, logs, metrics and even get the online dashboard with pm2.io.

List managed applications

List the status of all application managed by PM2:

 pm2 [list|ls|status]

Terminal Based Dashboard

Here is a realtime dashboard that fits directly into your terminal:

 pm2 monit

Output