pm2

# PM2 Process Manager Production process manager for Node.js with built-in load balancer. ## Install ```bash npm install -g pm2 ``` ## Quick Start ```bash # Start an app pm2 start app.js pm2 start npm --name "my-app" -- start pm2 start "npm run start" --name my-app # With specific port/env pm2 start npm --name "my-app" -- start -- --port 3000 PORT=3000 pm2 start npm --name "my-app" -- start ``` ## Common Commands ```bash # List processes pm2 list pm2 ls # Logs pm2 logs # All logs pm2 logs my-app # Specific app pm2 logs --lines 100 # Last 100 lines # Control pm2 restart my-app pm2 stop my-app pm2 delete my-app pm2 reload my-app # Zero-downtime reload # Info pm2 show my-app pm2 monit # Real-time monitor ``` ## Auto-Start on Boot ```bash # Save current process list pm2 save # Generate startup script (run the output command with sudo) pm2 startup # Example output - run this: # sudo env PATH=$PATH:/opt/homebrew/bin pm2 startup launchd -u username --hp /Users/username ``` ## Next.js / Production Builds ```bash # Build first npm run build # Start production server pm2 start npm --name "my-app" -- start # Or with ecosystem file pm2 start ecosystem.config.js ``` ## Ecosystem File (ecosystem.config.js) ```javascript module.exports = { apps: [{ name: 'my-app', script: 'npm', args: 'start', cwd: '/path/to/app', env: { NODE_ENV: 'production', PORT: 3000 } }] } ``` ## Useful Flags | Flag | Description | |------|-------------| | `--name` | Process name | | `--watch` | Restart on file changes | | `-i max` | Cluster mode (all CPUs) | | `--max-memory-restart 200M` | Auto-restart on memory limit | | `--cron "0 * * * *"` | Scheduled restart | ## Cleanup ```bash pm2 delete all # Remove all processes pm2 kill # Kill PM2 daemon pm2 unstartup # Remove startup script ```