PM2

PM2 vs Supervisor

Feature	PM2	Supervisor
Ecosystem	JavaScript	Python
Cluster Mode	✅	❌
Zero-downtime	✅	❌
Load Balancing	✅ Built-in	❌
Dashboard	✅ Built-in	❌

Installation

npm install -g pm2
pm2 --version

Quick Start

# Start app
pm2 start server.py --name snapcode --interpreter python3

# View status
pm2 status

# View logs
pm2 logs snapcode

With Config File

ecosystem.config.js

module.exports = {
  apps: [{
    name: 'snapcode',
    script: 'server.py',
    interpreter: 'python3',
    instances: 1,
    autorestart: true,
    max_memory_restart: '500M',
    env: { PORT: 8000 }
  }]
};

pm2 start ecosystem.config.js
pm2 save
pm2 startup

Management

pm2 start snapcode      # Start
pm2 stop snapcode       # Stop
pm2 restart snapcode    # Restart
pm2 reload snapcode     # Zero-downtime reload
pm2 delete snapcode     # Remove
pm2 logs snapcode       # Logs
pm2 monit               # Dashboard

Features

• ✅ Cluster mode (multiple instances)
• ✅ Zero-downtime reload
• ✅ Built-in load balancing
• ✅ Built-in monitoring dashboard
• ✅ Auto-restart on crash