pm2-process

You can achieve zero-downtime deployments for Node.js processes by configuring PM2 with an ecosystem.config.js file to handle clustering and auto-restart across multiple instances. This ensures continuous availability during updates.

PM2 clustering scales Node.js applications across multiple instances to fully utilize multi-core CPUs. This process management mechanism provides load-balanced execution, continuous health monitoring, and automatic restarts for production environments.

To start a clustered Node.js app, you configure an ecosystem.config.js file defining your application settings and then run the command pm2 start ecosystem.config.js. This launches your application with clustering, log routing, and graceful shutdown enabled.

Yes, PM2 is designed for server environments requiring centralized logs, metrics, and health checks. It handles log routing and operational visibility across environments while managing process monitoring and graceful shutdowns.

The best way to handle auto-restart and graceful shutdown for Node.js apps is using a process manager like PM2 to wire startup scripts and ecosystem configurations. This approach satisfies production requirements for health monitoring and zero-downtime deployments.